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2008 Commits
| Author | SHA1 | Message | Date | |
|---|---|---|---|---|
Daniel Vetter
|
c8a04cbeed |
drm-misc-next for 5.17:
UAPI Changes: Cross-subsystem Changes: * Move 'nomodeset' kernel boot option into DRM subsystem Core Changes: * Replace several DRM_*() logging macros with drm_*() equivalents * panel: Add quirk for Lenovo Yoga Book X91F/L * ttm: Documentation fixes Driver Changes: * Cleanup nomodeset handling in drivers * Fixes * bridge/anx7625: Fix reading EDID; Fix error code * bridge/megachips: Probe both bridges before registering * vboxvideo: Fix ERR_PTR usage -----BEGIN PGP SIGNATURE----- iQEzBAABCAAdFiEEchf7rIzpz2NEoWjlaA3BHVMLeiMFAmGklRkACgkQaA3BHVML eiPweQf7B6r4Bu5XRdodHs3arqt5A7st1ZIZKOwb6SdgriisViZPdAdmgoHjBxtj rMj0eUac80ssPmtXf6si0jDx2G/QS0bOT38g/NQ2rjxiR3jt5mjbKnd4m/fwVzxw uD9Qmk/6IlLdAQa4hpgmaF5er11zHxCxhKbDYlNzQX9dPqvHKq+KjN00FWkupqTl 5CSA6wRcZuQXbEIKrueXBWz0oX9/KX8LraI/U4Ze9I4PmP6iD09Au8dgx5Mc8pUC OfA94pTdUVjg9ZHBhI4jm1LRIYKDlQcOkAPSCGgrA61dM/J0JOYmiE0fRAV0KH0S 7lzKDXqnc/KoyohI8oGFYXNbMKf2cQ== =xiFx -----END PGP SIGNATURE----- Merge tag 'drm-misc-next-2021-11-29' of git://anongit.freedesktop.org/drm/drm-misc into drm-next drm-misc-next for 5.17: UAPI Changes: Cross-subsystem Changes: * Move 'nomodeset' kernel boot option into DRM subsystem Core Changes: * Replace several DRM_*() logging macros with drm_*() equivalents * panel: Add quirk for Lenovo Yoga Book X91F/L * ttm: Documentation fixes Driver Changes: * Cleanup nomodeset handling in drivers * Fixes * bridge/anx7625: Fix reading EDID; Fix error code * bridge/megachips: Probe both bridges before registering * vboxvideo: Fix ERR_PTR usage Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> From: Thomas Zimmermann <tzimmermann@suse.de> Link: https://patchwork.freedesktop.org/patch/msgid/YaSVz15Q7dAlEevU@linux-uq9g.fritz.box |
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David Woodhouse
|
74d9555580 |
PM: hibernate: Allow ACPI hardware signature to be honoured
Theoretically, when the hardware signature in FACS changes, the OS is supposed to gracefully decline to attempt to resume from S4: "If the signature has changed, OSPM will not restore the system context and can boot from scratch" In practice, Windows doesn't do this and many laptop vendors do allow the signature to change especially when docking/undocking, so it would be a bad idea to simply comply with the specification by default in the general case. However, there are use cases where we do want the compliant behaviour and we know it's safe. Specifically, when resuming virtual machines where we know the hypervisor has changed sufficiently that resume will fail. We really want to be able to *tell* the guest kernel not to try, so it boots cleanly and doesn't just crash. This patch provides a way to opt in to the spec-compliant behaviour on the command line. A follow-up patch may do this automatically for certain "known good" machines based on a DMI match, or perhaps just for all hypervisor guests since there's no good reason a hypervisor would change the hardware_signature that it exposes to guests *unless* it wants them to obey the ACPI specification. Signed-off-by: David Woodhouse <dwmw@amazon.co.uk> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
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Paul E. McKenney
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82e310033d |
rcutorture: Enable multiple concurrent callback-flood kthreads
This commit converts the rcutorture.fwd_progress module parameter from bool to int, so that it specifies the number of callback-flood kthreads. Values less than zero specify one kthread per CPU, however, the number of kthreads executing concurrently is limited to the number of online CPUs. This commit also reverse the order of the need-resched and callback-flood operations to cause the callback flooding to happen more nearly at the same time. Cc: Neeraj Upadhyay <neeraj.iitr10@gmail.com> Signed-off-by: Paul E. McKenney <paulmck@kernel.org> |
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Mauro Carvalho Chehab
|
4383cfa18c |
Linux 5.16-rc4
-----BEGIN PGP SIGNATURE----- iQFSBAABCAA8FiEEq68RxlopcLEwq+PEeb4+QwBBGIYFAmGtOFYeHHRvcnZhbGRz QGxpbnV4LWZvdW5kYXRpb24ub3JnAAoJEHm+PkMAQRiG1hUH/1bmlOYsscJ7biqd VECr5HhTg6iRvwWUiOpU27fLuBeAM1ZdF0oLuCtzvbK2h8lfTclcHfueihK0GIvX ci8BvwpOYfUdDUWHglgvGXqICqYch3PiBVMFiRRRkzcpZdyCFCirAynLdOeusdTU 72Fi2RBaIM+U/5UVKcTx0J9WJsvFcG97lnNX5nT3dUmuoSW4WmX+h4vIe8VYFVmd 8q1gD17hPL+ThTKcZApn7IsArU1LNEGRg0tYItgMJo8AMTvsZjwR6yQgXeyuQ0Xk xp6pZwzABtnL9dfNJ95q1GhsJBX5T5XvAVjt2uR1ADbgh6TDApC1VBKICm1Nva7g uT6S0yE= =JNL8 -----END PGP SIGNATURE----- Merge tag 'v5.16-rc4' into media_tree Linux 5.16-rc4 * tag 'v5.16-rc4': (984 commits) Linux 5.16-rc4 KVM: SVM: Do not terminate SEV-ES guests on GHCB validation failure KVM: SEV: Fall back to vmalloc for SEV-ES scratch area if necessary KVM: SEV: Return appropriate error codes if SEV-ES scratch setup fails parisc: Mark cr16 CPU clocksource unstable on all SMP machines parisc: Fix "make install" on newer debian releases sched/uclamp: Fix rq->uclamp_max not set on first enqueue preempt/dynamic: Fix setup_preempt_mode() return value cifs: avoid use of dstaddr as key for fscache client cookie cifs: add server conn_id to fscache client cookie cifs: wait for tcon resource_id before getting fscache super cifs: fix missed refcounting of ipc tcon x86/xen: Add xenpv_restore_regs_and_return_to_usermode() x86/entry: Use the correct fence macro after swapgs in kernel CR3 fget: check that the fd still exists after getting a ref to it x86/entry: Add a fence for kernel entry SWAPGS in paranoid_entry() x86/sev: Fix SEV-ES INS/OUTS instructions for word, dword, and qword powercap: DTPM: Drop unused local variable from init_dtpm() io-wq: don't retry task_work creation failure on fatal conditions serial: 8250_bcm7271: UART errors after resuming from S2 ... |
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Heiko Carstens
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aa483f3ce6 |
topology/sysfs: get rid of htmldoc warning
Stephen Rothwell reported the following warning caused by commit |
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Linus Torvalds
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f80ef9e49f |
A few important documentation fixes, including breakage that comes with
v1.0 of the ReadTheDocs theme. -----BEGIN PGP SIGNATURE----- iQFDBAABCAAtFiEEIw+MvkEiF49krdp9F0NaE2wMflgFAmGuS2oPHGNvcmJldEBs d24ubmV0AAoJEBdDWhNsDH5YYsEH/jyYembdY2dydJaVKqFgAa/IOG0SC7jfq3DQ sOcPMSVq4OTwPYGiki4Gn8raNOkoR5JhXJ7mvZgFP5cQJdVnsOkEL1sDKakxRkLk SvXYg3brLOjHRjRjmmbuLyZSwFquKr3lfOOLx2neTVk/xFSgTOlWY2OVEdToQ4CE wtntgL/kfmVBJor1ScwjnX27tB1dRC0cDrsD/NpuHitw9e3QxhvBGXnLAbGZV733 1i/Ge//oD4yan/lM89et4HSbI6QCV5vdaCDtCGkZhTCXyY/AWjStcDDKPwZNjUjA NIqDg85qeUCrMqnye4Jyl7zno2C3KDPa0XtyjOmKqIdFZC4mwRc= =IXEs -----END PGP SIGNATURE----- Merge tag 'docs-5.16-3' of git://git.lwn.net/linux Pull documentation fixes from Jonathan Corbet: "A few important documentation fixes, including breakage that comes with v1.0 of the ReadTheDocs theme" * tag 'docs-5.16-3' of git://git.lwn.net/linux: Documentation: Add minimum pahole version Documentation/process: fix self reference docs: admin-guide/blockdev: Remove digraph of node-states docs: conf.py: fix support for Readthedocs v 1.0.0 |
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Heiko Carstens
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f1045056c7 |
topology/sysfs: rework book and drawer topology ifdefery
Provide default defines for the topology_book_[id|cpumask] and topology_drawer_[id|cpumask] macros just like for each other topology level. This way all topology levels are handled in a similar way. Still the the book and drawer levels are only used on s390, and also the sysfs attributes are only created on s390. However other architectures may opt in if wanted. Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Heiko Carstens <hca@linux.ibm.com> Link: https://lore.kernel.org/r/20211129130309.3256168-4-hca@linux.ibm.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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Heiko Carstens
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e795707703 |
topology/sysfs: export cluster attributes only if an architectures has support
The cluster_id and cluster_cpus topology sysfs attributes have been
added with commit
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Heiko Carstens
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2c4dcd7fd5 |
topology/sysfs: export die attributes only if an architectures has support
The die_id and die_cpus topology sysfs attributes have been added with commit |
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Paul E. McKenney
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e2c73a6860 |
rcu: Remove the RCU_FAST_NO_HZ Kconfig option
All of the uses of CONFIG_RCU_FAST_NO_HZ=y that I have seen involve systems with RCU callbacks offloaded. In this situation, all that this Kconfig option does is slow down idle entry/exit with an additional allways-taken early exit. If this is the only use case, then this Kconfig option nothing but an attractive nuisance that needs to go away. This commit therefore removes the RCU_FAST_NO_HZ Kconfig option. Signed-off-by: Paul E. McKenney <paulmck@kernel.org> |
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Paul E. McKenney
|
db4cb76861 |
doc: Remove obsolete kernel-per-CPU-kthreads RCU_FAST_NO_HZ advice
This document advises building with both CONFIG_NO_HZ=y and CONFIG_RCU_FAST_NO_HZ=y. However, CONFIG_NO_HZ=y offloads callbacks from all nohz_full CPUs, and CPUs with offloaded callbacks do not benefit from CONFIG_RCU_FAST_NO_HZ=y. Quite the opposite: CONFIG_RCU_FAST_NO_HZ=y simply adds a bit of idle entry/exit overhead. This commit therefore changes that advice to only CONFIG_NO_HZ=y. Signed-off-by: Paul E. McKenney <paulmck@kernel.org> |
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Waiman Long
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1a5620671a |
clocksource: Reduce the default clocksource_watchdog() retries to 2
With the previous patch, there is an extra watchdog read in each retry. Now the total number of clocksource reads is increased to 4 per iteration. In order to avoid increasing the clock skew check overhead, the default maximum number of retries is reduced from 3 to 2 to maintain the same 12 clocksource reads in the worst case. Suggested-by: Paul E. McKenney <paulmck@kernel.org> Signed-off-by: Waiman Long <longman@redhat.com> Signed-off-by: Paul E. McKenney <paulmck@kernel.org> |
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Akira Yokosawa
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5c81691bb6 |
docs: admin-guide/blockdev: Remove digraph of node-states
While node-states-8.dot has two digraphs, the dot(1) command can
not properly handle multiple graphs in a DOT file and the
kernel-doc page at
https://www.kernel.org/doc/html/latest/admin-guide/blockdev/drbd/figures.html
fails to render the graphs.
It turned out that the digraph of node_states can be removed.
Quote from Joel's reflection:
On reflection, the digraph node_states can be removed entirely.
It is too basic to contain any useful information. In addition
it references "ioctl_set_state". The ioctl configuration
interface for DRBD has long been removed. In fact, it was never
in the upstream version of DRBD.
Remove node_states and rename the DOT file peer_states-8.dot.
Suggested-by: Joel Colledge <joel.colledge@linbit.com>
Acked-by: Joel Colledge <joel.colledge@linbit.com>
Signed-off-by: Akira Yokosawa <akiyks@gmail.com>
Cc: Philipp Reisner <philipp.reisner@linbit.com>
Cc: Lars Ellenberg <lars.ellenberg@linbit.com>
Link: https://lore.kernel.org/r/7df04f45-8746-e666-1a9d-a998f1ab1f91@gmail.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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Finn Thain
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376e3fdecb |
m68k: Enable memtest functionality
Enable the memtest functionality and rearrange some code to prevent it from clobbering the initrd. The code to implement CONFIG_BLK_DEV_INITRD was conditional on !defined(CONFIG_SUN3). For simplicity, remove that test on the basis that m68k_ramdisk.size == 0 on Sun 3. The SLIME source code at http://sammy.net/sun3/ftp/pub/m68k/sun3/slime/slime-2.0.tar.gz indicates that no BI_RAMDISK entry is ever passed to the kernel due to #ifdef 0 around the relevant code. Cc: Mike Rapoport <rppt@kernel.org> Cc: Sam Creasey <sammy@sammy.net> Cc: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Finn Thain <fthain@linux-m68k.org> Acked-by: Mike Rapoport <rppt@linux.ibm.com> Link: https://lore.kernel.org/r/8170fe1d1c62426d82275d36ba409ecc18754292.1637274578.git.fthain@linux-m68k.org Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> |
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Takashi Iwai
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9222ba68c3 |
Input: i8042 - add deferred probe support
We've got a bug report about the non-working keyboard on ASUS ZenBook UX425UA. It seems that the PS/2 device isn't ready immediately at boot but takes some seconds to get ready. Until now, the only workaround is to defer the probe, but it's available only when the driver is a module. However, many distros, including openSUSE as in the original report, build the PS/2 input drivers into kernel, hence it won't work easily. This patch adds the support for the deferred probe for i8042 stuff as a workaround of the problem above. When the deferred probe mode is enabled and the device couldn't be probed, it'll be repeated with the standard deferred probe mechanism. The deferred probe mode is enabled either via the new option i8042.probe_defer or via the quirk table entry. As of this patch, the quirk table contains only ASUS ZenBook UX425UA. The deferred probe part is based on Fabio's initial work. BugLink: https://bugzilla.suse.com/show_bug.cgi?id=1190256 Signed-off-by: Takashi Iwai <tiwai@suse.de> Tested-by: Samuel Čavoj <samuel@cavoj.net> Link: https://lore.kernel.org/r/20211117063757.11380-1-tiwai@suse.de Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> |
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Javier Martinez Canillas
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b22a15a5ac
|
Documentation/admin-guide: Document nomodeset kernel parameter
The nomodeset kernel command line parameter is not documented. Its name is quite vague and is not intuitive what's the behaviour when it is set. Document in kernel-parameters.txt what actually happens when nomodeset is used. That way, users could know if they want to enable this option. Signed-off-by: Javier Martinez Canillas <javierm@redhat.com> Acked-by: Thomas Zimmermann <tzimmermann@suse.de> Acked-by: Jani Nikula <jani.nikula@intel.com> Acked-by: Pekka Paalanen <pekka.paalanen@collabora.com> Link: https://patchwork.freedesktop.org/patch/msgid/20211112133230.1595307-6-javierm@redhat.com |
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Cédric Le Goater
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c21ee04f11 |
powerpc/xive: Add a kernel parameter for StoreEOI
StoreEOI is activated by default on platforms supporting the feature (POWER10) and will be used as soon as firmware advertises its availability. The kernel parameter provides a way to deactivate its use. It can be still be reactivated through debugfs. Signed-off-by: Cédric Le Goater <clg@kaod.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20211105102636.1016378-10-clg@kaod.org |
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Nicholas Piggin
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0a4b4327ce |
powerpc/64s: Implement PMU override command line option
It can be useful in simulators (with very constrained environments) to allow some PMCs to run from boot so they can be sampled directly by a test harness, rather than having to run perf. A previous change freezes counters at boot by default, so provide a boot time option to un-freeze (plus a bit more flexibility). Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Reviewed-by: Athira Jajeev <atrajeev@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20211123095231.1036501-13-npiggin@gmail.com |
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Linus Torvalds
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d1c2b55d84 |
platform-drivers-x86 for v5.16-2
Various build- and bug-fixes as well as 1 hardware-id addition. The following is an automated git shortlog grouped by driver: amd-pmc: - Make CONFIG_AMD_PMC depend on RTC_CLASS dell-wmi-descriptor: - disable by default hp_accel: - Fix an error handling path in 'lis3lv02d_probe()' platform/mellanox: - mlxreg-lc: fix error code in mlxreg_lc_create_static_devices() samsung-laptop: - Fix typo in a comment think-lmi: - Abort probe on analyze failure thinkpad_acpi: - fix documentation for adaptive keyboard - Fix WWAN device disabled issue after S3 deep - Add support for dual fan control -----BEGIN PGP SIGNATURE----- iQFIBAABCAAyFiEEuvA7XScYQRpenhd+kuxHeUQDJ9wFAmGWHnoUHGhkZWdvZWRl QHJlZGhhdC5jb20ACgkQkuxHeUQDJ9wwfwf9Hrv9vdzWDnwdeGh5BiWqeTq37/YT FqYB9HzKIaZKe5MYvibZD7sQQa86Up9/fTNF+TlIj+uMjgvzLkAXWR3841aGM7Mh z4OhCCx9aJLtpBUWyzsXRmO1ArLfkUIbHMBWMpcrPbeNGIwZMRfuq3ms5wPXWgfu QzNaDJEBHQlM4aNScb1K3a2HCXJIWcFw78/A8oq7LD0iKxd11ZmOuvKR9MIeUq5s hH/UEZqeJ8MCG+lNGShYvSCYAG1UIV6qF35XLR8VSlY/FZ48AcT6bgMyrhwJPrCW yJF6GBd8YnaAJqWWwqeaQMhIi8OKIMthFBbRd4epWAYmgP00w0ROJ+4SLQ== =siB2 -----END PGP SIGNATURE----- Merge tag 'platform-drivers-x86-v5.16-2' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86 Pull x86 platform driver fixes from Hans de Goede: "Various build- and bug-fixes as well as one hardware-id addition" * tag 'platform-drivers-x86-v5.16-2' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86: platform/x86: thinkpad_acpi: fix documentation for adaptive keyboard platform/x86: thinkpad_acpi: Fix WWAN device disabled issue after S3 deep platform/x86: thinkpad_acpi: Add support for dual fan control platform/x86: think-lmi: Abort probe on analyze failure platform/x86: dell-wmi-descriptor: disable by default platform/x86: samsung-laptop: Fix typo in a comment platform/x86: hp_accel: Fix an error handling path in 'lis3lv02d_probe()' platform/x86: amd-pmc: Make CONFIG_AMD_PMC depend on RTC_CLASS platform/mellanox: mlxreg-lc: fix error code in mlxreg_lc_create_static_devices() |
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Mauro Carvalho Chehab
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0f60a29c52 |
docs: accounting: update delay-accounting.rst reference
The file name: accounting/delay-accounting.rst should be, instead: Documentation/accounting/delay-accounting.rst. Also, there's no need to use doc:`foo`, as automarkup.py will automatically handle plain text mentions to Documentation/ files. So, update its cross-reference accordingly. Fixes: |
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Vincent Bernat
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d477a907cb |
platform/x86: thinkpad_acpi: fix documentation for adaptive keyboard
The different values were offset by 1. 0 is for "home mode", 1 for "web-browser mode", etc. Moreover, the URL to the laptop's user guide did not work anymore. Signed-off-by: Vincent Bernat <vincent@bernat.ch> Link: https://lore.kernel.org/r/20211109195209.176905-1-vincent@bernat.ch Signed-off-by: Hans de Goede <hdegoede@redhat.com> |
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Dillon Min
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c9c9e2ab03 |
media: admin-guide: add stm32-dma2d description
add stm32-dma2d description for dma2d driver Signed-off-by: Dillon Min <dillon.minfei@gmail.com> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> |
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Linus Torvalds
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38764c7340 |
A slow cycle for nfsd: mainly cleanup, including Neil's patch dropping
support for a filehandle format deprecated 20 years ago, and further
xdr-related cleanup from Chuck.
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Merge tag 'nfsd-5.16' of git://linux-nfs.org/~bfields/linux
Pull nfsd updates from Bruce Fields:
"A slow cycle for nfsd: mainly cleanup, including Neil's patch dropping
support for a filehandle format deprecated 20 years ago, and further
xdr-related cleanup from Chuck"
* tag 'nfsd-5.16' of git://linux-nfs.org/~bfields/linux: (26 commits)
nfsd4: remove obselete comment
nfsd: document server-to-server-copy parameters
NFSD:fix boolreturn.cocci warning
nfsd: update create verifier comment
SUNRPC: Change return value type of .pc_encode
SUNRPC: Replace the "__be32 *p" parameter to .pc_encode
NFSD: Save location of NFSv4 COMPOUND status
SUNRPC: Change return value type of .pc_decode
SUNRPC: Replace the "__be32 *p" parameter to .pc_decode
SUNRPC: De-duplicate .pc_release() call sites
SUNRPC: Simplify the SVC dispatch code path
SUNRPC: Capture value of xdr_buf::page_base
SUNRPC: Add trace event when alloc_pages_bulk() makes no progress
svcrdma: Split svcrmda_wc_{read,write} tracepoints
svcrdma: Split the svcrdma_wc_send() tracepoint
svcrdma: Split the svcrdma_wc_receive() tracepoint
NFSD: Have legacy NFSD WRITE decoders use xdr_stream_subsegment()
SUNRPC: xdr_stream_subsegment() must handle non-zero page_bases
NFSD: Initialize pointer ni with NULL and not plain integer 0
NFSD: simplify struct nfsfh
...
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Linus Torvalds
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a41b74451b |
kernel.sys.v5.16
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Merge tag 'kernel.sys.v5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux
Pull prctl updates from Christian Brauner:
"This contains the missing prctl uapi pieces for PR_SCHED_CORE.
In order to activate core scheduling the caller is expected to specify
the scope of the new core scheduling domain.
For example, passing 2 in the 4th argument of
prctl(PR_SCHED_CORE, PR_SCHED_CORE_CREATE, <pid>, 2, 0);
would indicate that the new core scheduling domain encompasses all
tasks in the process group of <pid>. Specifying 0 would only create a
core scheduling domain for the thread identified by <pid> and 2 would
encompass the whole thread-group of <pid>.
Note, the values 0, 1, and 2 correspond to PIDTYPE_PID, PIDTYPE_TGID,
and PIDTYPE_PGID. A first version tried to expose those values
directly to which I objected because:
- PIDTYPE_* is an enum that is kernel internal which we should not
expose to userspace directly.
- PIDTYPE_* indicates what a given struct pid is used for it doesn't
express a scope.
But what the 4th argument of PR_SCHED_CORE prctl() expresses is the
scope of the operation, i.e. the scope of the core scheduling domain
at creation time. So Eugene's patch now simply introduces three new
defines PR_SCHED_CORE_SCOPE_THREAD, PR_SCHED_CORE_SCOPE_THREAD_GROUP,
and PR_SCHED_CORE_SCOPE_PROCESS_GROUP. They simply express what
happens.
This has been on the mailing list for quite a while with all relevant
scheduler folks Cced. I announced multiple times that I'd pick this up
if I don't see or her anyone else doing it. None of this touches
proper scheduler code but only concerns uapi so I think this is fine.
With core scheduling being quite common now for vm managers (e.g.
moving individual vcpu threads into their own core scheduling domain)
and container managers (e.g. moving the init process into its own core
scheduling domain and letting all created children inherit it) having
to rely on raw numbers passed as the 4th argument in prctl() is a bit
annoying and everyone is starting to come up with their own defines"
* tag 'kernel.sys.v5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux:
uapi/linux/prctl: provide macro definitions for the PR_SCHED_CORE type argument
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Linus Torvalds
|
bf98ecbbae |
xen: branch for v5.16-rc1
-----BEGIN PGP SIGNATURE----- iHUEABYIAB0WIQRTLbB6QfY48x44uB6AXGG7T9hjvgUCYYp8HgAKCRCAXGG7T9hj vmuVAP4whjbyIi4IxYEOnE6On0aD0AgUMiFa7QXrDZi6NXUQIwEAnggLFe+rEG5C Fwi/cEXSHrRgveqrgD4GYEr6l0GTxwM= =/fMa -----END PGP SIGNATURE----- Merge tag 'for-linus-5.16b-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip Pull xen updates from Juergen Gross: - a series to speed up the boot of Xen PV guests - some cleanups in Xen related code - replacement of license texts with the appropriate SPDX headers and fixing of wrong SPDX headers in Xen header files - a small series making paravirtualized interrupt masking much simpler and at the same time removing complaints of objtool - a fix for Xen ballooning hogging workqueues for too long - enablement of the Xen pciback driver for Arm - some further small fixes/enhancements * tag 'for-linus-5.16b-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip: (22 commits) xen/balloon: fix unused-variable warning xen/balloon: rename alloc/free_xenballooned_pages xen/balloon: add late_initcall_sync() for initial ballooning done x86/xen: remove 32-bit awareness from startup_xen xen: remove highmem remnants xen: allow pv-only hypercalls only with CONFIG_XEN_PV x86/xen: remove 32-bit pv leftovers xen-pciback: allow compiling on other archs than x86 x86/xen: switch initial pvops IRQ functions to dummy ones x86/xen: remove xen_have_vcpu_info_placement flag x86/pvh: add prototype for xen_pvh_init() xen: Fix implicit type conversion xen: fix wrong SPDX headers of Xen related headers xen/pvcalls-back: Remove redundant 'flush_workqueue()' calls x86/xen: Remove redundant irq_enter/exit() invocations xen-pciback: Fix return in pm_ctrl_init() xen/x86: restrict PV Dom0 identity mapping xen/x86: there's no highmem anymore in PV mode xen/x86: adjust handling of the L3 user vsyscall special page table xen/x86: adjust xen_set_fixmap() ... |
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Linus Torvalds
|
2acda7549e |
\n
-----BEGIN PGP SIGNATURE----- iQEzBAABCAAdFiEEq1nRK9aeMoq1VSgcnJ2qBz9kQNkFAmGFN6IACgkQnJ2qBz9k QNkfYwgA1w5x/CsN2IMZdx6FTuZFgbOvQpBMTry8iuOPKK3UyIkZaUirTVLKR0cm k3QbBR9/vTfQTNg5weuFJcbPZZaCXKEvlPGvDh+pumMbfTkMwL3FADweNBoZ3PzO EiRrV45AbRgSMOzsfURzCz1T53Gd8fYM3pXxmNXG+bnE7+Ea+heKgor8/jFc4U3w kAKZTfyCiheo7KxVhFGnkGI3ZhIbnbZne4seY/CE4qtv7/bmBE7bhGpmv8LT5FUn h/JBDLjFU0fzJpplXE6n/VHXeGaUwb8adnYpzojWQ0lLYFrMIZFQ0KkDK6PNwmJF MKWGqRxDkf54oeWuEAJ9t4/OorqM9A== =ltE7 -----END PGP SIGNATURE----- Merge tag 'fsnotify_for_v5.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs Pull fsnotify updates from Jan Kara: "Support for reporting filesystem errors through fanotify so that system health monitoring daemons can watch for these and act instead of scraping system logs" * tag 'fsnotify_for_v5.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs: (34 commits) samples: remove duplicate include in fs-monitor.c samples: Fix warning in fsnotify sample docs: Fix formatting of literal sections in fanotify docs samples: Make fs-monitor depend on libc and headers docs: Document the FAN_FS_ERROR event samples: Add fs error monitoring example ext4: Send notifications on error fanotify: Allow users to request FAN_FS_ERROR events fanotify: Emit generic error info for error event fanotify: Report fid info for file related file system errors fanotify: WARN_ON against too large file handles fanotify: Add helpers to decide whether to report FID/DFID fanotify: Wrap object_fh inline space in a creator macro fanotify: Support merging of error events fanotify: Support enqueueing of error events fanotify: Pre-allocate pool of error events fanotify: Reserve UAPI bits for FAN_FS_ERROR fsnotify: Support FS_ERROR event type fanotify: Require fid_mode for any non-fd event fanotify: Encode empty file handle when no inode is provided ... |
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Linus Torvalds
|
0b707e572a |
s390 updates for the 5.16 merge window
- Add support for ftrace with direct call and ftrace direct call samples. - Add support for kernel command lines longer than current 896 bytes and make its length configurable. - Add support for BEAR enhancement facility to improve last breaking event instruction tracking. - Add kprobes sanity checks and testcases to prevent kprobe in the mid of an instruction. - Allow concurrent access to /dev/hwc for the CPUMF users. - Various ftrace / jump label improvements. - Convert unwinder tests to KUnit. - Add s390_iommu_aperture kernel parameter to tweak the limits on concurrently usable DMA mappings. - Add ap.useirq AP module option which can be used to disable interrupt use. - Add add_disk() error handling support to block device drivers. - Drop arch specific and use generic implementation of strlcpy and strrchr. - Several __pa/__va usages fixes. - Various cio, crypto, pci, kernel doc and other small fixes and improvements all over the code. -----BEGIN PGP SIGNATURE----- iQEzBAABCAAdFiEE3QHqV+H2a8xAv27vjYWKoQLXFBgFAmGFW6EACgkQjYWKoQLX FBg20Qf/UbohgnKnE6vxbbH3sNTlI2dk3Cw4z3IobcsZgqXAu6AFLgLQGLk/X07F DIyUdrgSgCzLIEKLqrLrFXIOMIK44zAGaurIltNt7IrnWWlA+/YVD+YeL2gHwccq wT7KXRcrVMZQ1z18djJQ45DpPUC8ErBdL6+P+ftHck90YGFZsfMA5S7jf8X1h08U IlqdPTmY8t4unKHWVpHbxx9b+xrUuV6KTEXADsllpMV2jQoTLdDECd3vmefYR6tR 3lssgop1m/RzH5OCqvia5Sy2D5fOQObNWDMakwOkVMxOD43lmGCTHstzS2Uo2OFE QcY79lfZ5NrzKnenUdE5Fd0XJ9kSwQ== =k0Ab -----END PGP SIGNATURE----- Merge tag 's390-5.16-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux Pull s390 updates from Vasily Gorbik: - Add support for ftrace with direct call and ftrace direct call samples. - Add support for kernel command lines longer than current 896 bytes and make its length configurable. - Add support for BEAR enhancement facility to improve last breaking event instruction tracking. - Add kprobes sanity checks and testcases to prevent kprobe in the mid of an instruction. - Allow concurrent access to /dev/hwc for the CPUMF users. - Various ftrace / jump label improvements. - Convert unwinder tests to KUnit. - Add s390_iommu_aperture kernel parameter to tweak the limits on concurrently usable DMA mappings. - Add ap.useirq AP module option which can be used to disable interrupt use. - Add add_disk() error handling support to block device drivers. - Drop arch specific and use generic implementation of strlcpy and strrchr. - Several __pa/__va usages fixes. - Various cio, crypto, pci, kernel doc and other small fixes and improvements all over the code. [ Merge fixup as per https://lore.kernel.org/all/YXAqZ%2FEszRisunQw@osiris/ ] * tag 's390-5.16-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (63 commits) s390: make command line configurable s390: support command lines longer than 896 bytes s390/kexec_file: move kernel image size check s390/pci: add s390_iommu_aperture kernel parameter s390/spinlock: remove incorrect kernel doc indicator s390/string: use generic strlcpy s390/string: use generic strrchr s390/ap: function rework based on compiler warning s390/cio: make ccw_device_dma_* more robust s390/vfio-ap: s390/crypto: fix all kernel-doc warnings s390/hmcdrv: fix kernel doc comments s390/ap: new module option ap.useirq s390/cpumf: Allow multiple processes to access /dev/hwc s390/bitops: return true/false (not 1/0) from bool functions s390: add support for BEAR enhancement facility s390: introduce nospec_uses_trampoline() s390: rename last_break to pgm_last_break s390/ptrace: add last_break member to pt_regs s390/sclp: sort out physical vs virtual pointers usage s390/setup: convert start and end initrd pointers to virtual ... |
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|
Linus Torvalds
|
512b7931ad |
Merge branch 'akpm' (patches from Andrew)
Merge misc updates from Andrew Morton: "257 patches. Subsystems affected by this patch series: scripts, ocfs2, vfs, and mm (slab-generic, slab, slub, kconfig, dax, kasan, debug, pagecache, gup, swap, memcg, pagemap, mprotect, mremap, iomap, tracing, vmalloc, pagealloc, memory-failure, hugetlb, userfaultfd, vmscan, tools, memblock, oom-kill, hugetlbfs, migration, thp, readahead, nommu, ksm, vmstat, madvise, memory-hotplug, rmap, zsmalloc, highmem, zram, cleanups, kfence, and damon)" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (257 commits) mm/damon: remove return value from before_terminate callback mm/damon: fix a few spelling mistakes in comments and a pr_debug message mm/damon: simplify stop mechanism Docs/admin-guide/mm/pagemap: wordsmith page flags descriptions Docs/admin-guide/mm/damon/start: simplify the content Docs/admin-guide/mm/damon/start: fix a wrong link Docs/admin-guide/mm/damon/start: fix wrong example commands mm/damon/dbgfs: add adaptive_targets list check before enable monitor_on mm/damon: remove unnecessary variable initialization Documentation/admin-guide/mm/damon: add a document for DAMON_RECLAIM mm/damon: introduce DAMON-based Reclamation (DAMON_RECLAIM) selftests/damon: support watermarks mm/damon/dbgfs: support watermarks mm/damon/schemes: activate schemes based on a watermarks mechanism tools/selftests/damon: update for regions prioritization of schemes mm/damon/dbgfs: support prioritization weights mm/damon/vaddr,paddr: support pageout prioritization mm/damon/schemes: prioritize regions within the quotas mm/damon/selftests: support schemes quotas mm/damon/dbgfs: support quotas of schemes ... |
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SeongJae Park
|
0d16cfd46b |
Docs/admin-guide/mm/pagemap: wordsmith page flags descriptions
Some descriptions of page flags in 'pagemap.rst' are written in
assumption of none-rst, which respects every new line, as below:
7 - SLAB
page is managed by the SLAB/SLOB/SLUB/SLQB kernel memory allocator
When compound page is used, SLUB/SLQB will only set this flag on the head
Because rst ignores the new line between the first sentence and second
sentence, resulting html looks a little bit weird, as below.
7 - SLAB
page is managed by the SLAB/SLOB/SLUB/SLQB kernel memory allocator When
^
compound page is used, SLUB/SLQB will only set this flag on the head
page; SLOB will not flag it at all.
This change makes it more natural and consistent with other parts in the
rendered version.
Link: https://lkml.kernel.org/r/20211022090311.3856-5-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Peter Xu <peterx@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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|
SeongJae Park
|
b1eee3c548 |
Docs/admin-guide/mm/damon/start: simplify the content
Information in 'TL; DR' section of 'Getting Started' is duplicated in other parts of the doc. It is also asking readers to visit the access pattern visualizations gallery web site to show the results of example visualization commands, while the users of the commands can use terminal output. To make the doc simple, this removes the duplicated 'TL; DR' section and replaces the visualization example commands with versions using terminal outputs. Link: https://lkml.kernel.org/r/20211022090311.3856-4-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Peter Xu <peterx@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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SeongJae Park
|
49ce7dee10 |
Docs/admin-guide/mm/damon/start: fix a wrong link
The 'Getting Started' of DAMON is providing a link to DAMON's user interface document while saying about its user space tool's detailed usages. This fixes the link. Link: https://lkml.kernel.org/r/20211022090311.3856-3-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Peter Xu <peterx@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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SeongJae Park
|
82e3fff55d |
Docs/admin-guide/mm/damon/start: fix wrong example commands
Patch series "Fix trivial nits in Documentation/admin-guide/mm". This patchset fixes trivial nits in admin guide documents for DAMON and pagemap. This patch (of 4): Some of the example commands in DAMON getting started guide are outdated, missing sudo, or just wrong. This fixes those. Link: https://lkml.kernel.org/r/20211022090311.3856-2-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Peter Xu <peterx@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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SeongJae Park
|
bec976b691 |
Documentation/admin-guide/mm/damon: add a document for DAMON_RECLAIM
This adds an admin-guide document for DAMON-based Reclamation. Link: https://lkml.kernel.org/r/20211019150731.16699-16-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Cc: Amit Shah <amit@kernel.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: David Hildenbrand <david@redhat.com> Cc: David Rientjes <rientjes@google.com> Cc: David Woodhouse <dwmw@amazon.com> Cc: Greg Thelen <gthelen@google.com> Cc: Jonathan Cameron <Jonathan.Cameron@huawei.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Leonard Foerster <foersleo@amazon.de> Cc: Marco Elver <elver@google.com> Cc: Markus Boehme <markubo@amazon.de> Cc: Shakeel Butt <shakeelb@google.com> Cc: Shuah Khan <shuah@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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SeongJae Park
|
c638072107 |
Docs/DAMON: document physical memory monitoring support
This updates the DAMON documents for the physical memory address space monitoring support. Link: https://lkml.kernel.org/r/20211012205711.29216-8-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Cc: Amit Shah <amit@kernel.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Brendan Higgins <brendanhiggins@google.com> Cc: David Hildenbrand <david@redhat.com> Cc: David Rienjes <rientjes@google.com> Cc: David Woodhouse <dwmw@amazon.com> Cc: Greg Thelen <gthelen@google.com> Cc: Jonathan Cameron <Jonathan.Cameron@huawei.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Leonard Foerster <foersleo@amazon.de> Cc: Marco Elver <elver@google.com> Cc: Markus Boehme <markubo@amazon.de> Cc: Shakeel Butt <shakeelb@google.com> Cc: Shuah Khan <shuah@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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SeongJae Park
|
c2fe4987ed |
Docs/admin-guide/mm/damon: document 'init_regions' feature
This adds description of the 'init_regions' feature in the DAMON usage document. Link: https://lkml.kernel.org/r/20211012205711.29216-4-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Cc: Amit Shah <amit@kernel.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Brendan Higgins <brendanhiggins@google.com> Cc: David Hildenbrand <david@redhat.com> Cc: David Rienjes <rientjes@google.com> Cc: David Woodhouse <dwmw@amazon.com> Cc: Greg Thelen <gthelen@google.com> Cc: Jonathan Cameron <Jonathan.Cameron@huawei.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Leonard Foerster <foersleo@amazon.de> Cc: Marco Elver <elver@google.com> Cc: Markus Boehme <markubo@amazon.de> Cc: Shakeel Butt <shakeelb@google.com> Cc: Shuah Khan <shuah@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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SeongJae Park
|
68536f8e01 |
Docs/admin-guide/mm/damon: document DAMON-based Operation Schemes
This adds the description of DAMON-based operation schemes in the DAMON documents. Link: https://lkml.kernel.org/r/20211001125604.29660-8-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Cc: Amit Shah <amit@kernel.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: David Hildenbrand <david@redhat.com> Cc: David Rienjes <rientjes@google.com> Cc: David Woodhouse <dwmw@amazon.com> Cc: Greg Thelen <gthelen@google.com> Cc: Jonathan Cameron <Jonathan.Cameron@huawei.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Leonard Foerster <foersleo@amazon.de> Cc: Marco Elver <elver@google.com> Cc: Markus Boehme <markubo@amazon.de> Cc: Shakeel Butt <shakeelb@google.com> Cc: Shuah Khan <shuah@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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SeongJae Park
|
ad782c48df |
Documentation/vm: move user guides to admin-guide/mm/
Most memory management user guide documents are in 'admin-guide/mm/', but two of those are in 'vm/'. This moves the two docs into 'admin-guide/mm' for easier documents finding. Link: https://lkml.kernel.org/r/20210917123958.3819-2-sj@kernel.org Signed-off-by: SeongJae Park <sjpark@amazon.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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Brian Geffon
|
755804d169 |
zram: introduce an aged idle interface
This change introduces an aged idle interface to the existing idle sysfs file for zram. When CONFIG_ZRAM_MEMORY_TRACKING is enabled the idle file now also accepts an integer argument. This integer is the age (in seconds) of pages to mark as idle. The idle file still supports 'all' as it always has. This new approach allows for much more control over which pages get marked as idle. [bgeffon@google.com: use IS_ENABLED and cleanup comment] Link: https://lkml.kernel.org/r/20210924161128.1508015-1-bgeffon@google.com [bgeffon@google.com: Sergey's cleanup suggestions] Link: https://lkml.kernel.org/r/20210929143056.13067-1-bgeffon@google.com Link: https://lkml.kernel.org/r/20210923130115.1344361-1-bgeffon@google.com Signed-off-by: Brian Geffon <bgeffon@google.com> Acked-by: Minchan Kim <minchan@kernel.org> Reviewed-by: Sergey Senozhatsky <senozhatsky@chromium.org> Cc: Nitin Gupta <ngupta@vflare.org> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Suleiman Souhlal <suleiman@google.com> Cc: Jesse Barnes <jsbarnes@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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David Hildenbrand
|
9e122cc1bd |
memory-hotplug.rst: document the "auto-movable" online policy
Commit
|
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|
David Hildenbrand
|
a8db400f99 |
memory-hotplug.rst: fix wrong /sys/module/memory_hotplug/parameters/ path
We accidentially added a superfluous "s".
Link: https://lkml.kernel.org/r/20210930144117.23641-3-david@redhat.com
Fixes:
|
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|
David Hildenbrand
|
d83fe3c99d |
memory-hotplug.rst: fix two instances of "movablecore" that should be "movable_node"
Patch series "memory-hotplug.rst: document the "auto-movable" online
policy".
Now that the memory-hotplug.rst overhaul is upstream, proper
documentation for the "auto-movable" online policy, documenting all new
toggles and options. Along, two fixes for the original overhaul.
This patch (of 3):
We really want to refer to the "movable_node" kernel command line
parameter here.
Link: https://lkml.kernel.org/r/20210930144117.23641-2-david@redhat.com
Fixes:
|
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|
Zhenguo Yao
|
b5389086ad |
hugetlbfs: extend the definition of hugepages parameter to support node allocation
We can specify the number of hugepages to allocate at boot. But the hugepages is balanced in all nodes at present. In some scenarios, we only need hugepages in one node. For example: DPDK needs hugepages which are in the same node as NIC. If DPDK needs four hugepages of 1G size in node1 and system has 16 numa nodes we must reserve 64 hugepages on the kernel cmdline. But only four hugepages are used. The others should be free after boot. If the system memory is low(for example: 64G), it will be an impossible task. So extend the hugepages parameter to support specifying hugepages on a specific node. For example add following parameter: hugepagesz=1G hugepages=0:1,1:3 It will allocate 1 hugepage in node0 and 3 hugepages in node1. Link: https://lkml.kernel.org/r/20211005054729.86457-1-yaozhenguo1@gmail.com Signed-off-by: Zhenguo Yao <yaozhenguo1@gmail.com> Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com> Cc: Zhenguo Yao <yaozhenguo1@gmail.com> Cc: Dan Carpenter <dan.carpenter@oracle.com> Cc: Nathan Chancellor <nathan@kernel.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Mike Rapoport <rppt@kernel.org> Cc: Matthew Wilcox (Oracle) <willy@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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|
Baolin Wang
|
38e719ab26 |
hugetlb: support node specified when using cma for gigantic hugepages
Now the size of CMA area for gigantic hugepages runtime allocation is balanced for all online nodes, but we also want to specify the size of CMA per-node, or only one node in some cases, which are similar with patch [1]. For example, on some multi-nodes systems, each node's memory can be different, allocating the same size of CMA for each node is not suitable for the low-memory nodes. Meanwhile some workloads like DPDK mentioned by Zhenguo in patch [1] only need hugepages in one node. On the other hand, we have some machines with multiple types of memory, like DRAM and PMEM (persistent memory). On this system, we may want to specify all the hugepages only on DRAM node, or specify the proportion of DRAM node and PMEM node, to tuning the performance of the workloads. Thus this patch adds node format for 'hugetlb_cma' parameter to support specifying the size of CMA per-node. An example is as follows: hugetlb_cma=0:5G,2:5G which means allocating 5G size of CMA area on node 0 and node 2 respectively. And the users should use the node specific sysfs file to allocate the gigantic hugepages if specified the CMA size on that node. Link: https://lkml.kernel.org/r/20211005054729.86457-1-yaozhenguo1@gmail.com [1] Link: https://lkml.kernel.org/r/bb790775ca60bb8f4b26956bb3f6988f74e075c7.1634261144.git.baolin.wang@linux.alibaba.com Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com> Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com> Cc: Michal Hocko <mhocko@kernel.org> Cc: Roman Gushchin <guro@fb.com> Cc: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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|
Mike Kravetz
|
79dfc69552 |
hugetlb: add demote hugetlb page sysfs interfaces
Patch series "hugetlb: add demote/split page functionality", v4.
The concurrent use of multiple hugetlb page sizes on a single system is
becoming more common. One of the reasons is better TLB support for
gigantic page sizes on x86 hardware. In addition, hugetlb pages are
being used to back VMs in hosting environments.
When using hugetlb pages to back VMs, it is often desirable to
preallocate hugetlb pools. This avoids the delay and uncertainty of
allocating hugetlb pages at VM startup. In addition, preallocating huge
pages minimizes the issue of memory fragmentation that increases the
longer the system is up and running.
In such environments, a combination of larger and smaller hugetlb pages
are preallocated in anticipation of backing VMs of various sizes. Over
time, the preallocated pool of smaller hugetlb pages may become depleted
while larger hugetlb pages still remain. In such situations, it is
desirable to convert larger hugetlb pages to smaller hugetlb pages.
Converting larger to smaller hugetlb pages can be accomplished today by
first freeing the larger page to the buddy allocator and then allocating
the smaller pages. For example, to convert 50 GB pages on x86:
gb_pages=`cat .../hugepages-1048576kB/nr_hugepages`
m2_pages=`cat .../hugepages-2048kB/nr_hugepages`
echo $(($gb_pages - 50)) > .../hugepages-1048576kB/nr_hugepages
echo $(($m2_pages + 25600)) > .../hugepages-2048kB/nr_hugepages
On an idle system this operation is fairly reliable and results are as
expected. The number of 2MB pages is increased as expected and the time
of the operation is a second or two.
However, when there is activity on the system the following issues
arise:
1) This process can take quite some time, especially if allocation of
the smaller pages is not immediate and requires migration/compaction.
2) There is no guarantee that the total size of smaller pages allocated
will match the size of the larger page which was freed. This is
because the area freed by the larger page could quickly be
fragmented.
In a test environment with a load that continually fills the page cache
with clean pages, results such as the following can be observed:
Unexpected number of 2MB pages allocated: Expected 25600, have 19944
real 0m42.092s
user 0m0.008s
sys 0m41.467s
To address these issues, introduce the concept of hugetlb page demotion.
Demotion provides a means of 'in place' splitting of a hugetlb page to
pages of a smaller size. This avoids freeing pages to buddy and then
trying to allocate from buddy.
Page demotion is controlled via sysfs files that reside in the per-hugetlb
page size and per node directories.
- demote_size
Target page size for demotion, a smaller huge page size. File
can be written to chose a smaller huge page size if multiple are
available.
- demote
Writable number of hugetlb pages to be demoted
To demote 50 GB huge pages, one would:
cat .../hugepages-1048576kB/free_hugepages /* optional, verify free pages */
cat .../hugepages-1048576kB/demote_size /* optional, verify target size */
echo 50 > .../hugepages-1048576kB/demote
Only hugetlb pages which are free at the time of the request can be
demoted. Demotion does not add to the complexity of surplus pages and
honors reserved huge pages. Therefore, when a value is written to the
sysfs demote file, that value is only the maximum number of pages which
will be demoted. It is possible fewer will actually be demoted. The
recently introduced per-hstate mutex is used to synchronize demote
operations with other operations that modify hugetlb pools.
Real world use cases
--------------------
The above scenario describes a real world use case where hugetlb pages
are used to back VMs on x86. Both issues of long allocation times and
not necessarily getting the expected number of smaller huge pages after
a free and allocate cycle have been experienced. The occurrence of
these issues is dependent on other activity within the host and can not
be predicted.
This patch (of 5):
Two new sysfs files are added to demote hugtlb pages. These files are
both per-hugetlb page size and per node. Files are:
demote_size - The size in Kb that pages are demoted to. (read-write)
demote - The number of huge pages to demote. (write-only)
By default, demote_size is the next smallest huge page size. Valid huge
page sizes less than huge page size may be written to this file. When
huge pages are demoted, they are demoted to this size.
Writing a value to demote will result in an attempt to demote that
number of hugetlb pages to an appropriate number of demote_size pages.
NOTE: Demote interfaces are only provided for huge page sizes if there
is a smaller target demote huge page size. For example, on x86 1GB huge
pages will have demote interfaces. 2MB huge pages will not have demote
interfaces.
This patch does not provide full demote functionality. It only provides
the sysfs interfaces.
It also provides documentation for the new interfaces.
[mike.kravetz@oracle.com: n_mask initialization does not need to be protected by the mutex]
Link: https://lkml.kernel.org/r/0530e4ef-2492-5186-f919-5db68edea654@oracle.com
Link: https://lkml.kernel.org/r/20211007181918.136982-2-mike.kravetz@oracle.com
Signed-off-by: Mike Kravetz <mike.kravetz@oracle.com>
Reviewed-by: Oscar Salvador <osalvador@suse.de>
Cc: David Hildenbrand <david@redhat.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Zi Yan <ziy@nvidia.com>
Cc: Muchun Song <songmuchun@bytedance.com>
Cc: Naoya Horiguchi <naoya.horiguchi@linux.dev>
Cc: David Rientjes <rientjes@google.com>
Cc: "Aneesh Kumar K . V" <aneesh.kumar@linux.ibm.com>
Cc: Nghia Le <nghialm78@gmail.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
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Tiberiu A Georgescu
|
cbbb69d3c4 |
Documentation: update pagemap with shmem exceptions
This patch follows the discussions on previous documentation patch threads [1][2]. It presents the exception case of shared memory management from the pagemap's point of view. It briefly describes what is missing, why it is missing and alternatives to the pagemap for page info retrieval in user space. In short, the kernel does not keep track of PTEs for swapped out shared pages within the processes that references them. Thus, the proc/pid/pagemap tool cannot print the swap destination of the shared memory pages, instead setting the pagemap entry to zero for both non-allocated and swapped out pages. This can create confusion for users who need information on swapped out pages. The reasons why maintaining the PTEs of all swapped out shared pages among all processes while maintaining similar performance is not a trivial task, or a desirable change, have been discussed extensively [1][3][4][5]. There are also arguments for why this arguably missing information should eventually be exposed to the user in either a future pagemap patch, or by an alternative tool. [1]: https://marc.info/?m=162878395426774 [2]: https://lore.kernel.org/lkml/20210920164931.175411-1-tiberiu.georgescu@nutanix.com/ [3]: https://lore.kernel.org/lkml/20210730160826.63785-1-tiberiu.georgescu@nutanix.com/ [4]: https://lore.kernel.org/lkml/20210807032521.7591-1-peterx@redhat.com/ [5]: https://lore.kernel.org/lkml/20210715201651.212134-1-peterx@redhat.com/ Mention the current missing information in the pagemap and alternatives on how to retrieve it, in case someone stumbles upon unexpected behaviour. Link: https://lkml.kernel.org/r/20210923064618.157046-1-tiberiu.georgescu@nutanix.com Link: https://lkml.kernel.org/r/20210923064618.157046-2-tiberiu.georgescu@nutanix.com Signed-off-by: Tiberiu A Georgescu <tiberiu.georgescu@nutanix.com> Reviewed-by: Ivan Teterevkov <ivan.teterevkov@nutanix.com> Reviewed-by: Florian Schmidt <florian.schmidt@nutanix.com> Reviewed-by: Carl Waldspurger <carl.waldspurger@nutanix.com> Reviewed-by: Jonathan Davies <jonathan.davies@nutanix.com> Reviewed-by: Peter Xu <peterx@redhat.com> Reviewed-by: David Hildenbrand <david@redhat.com> Cc: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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Shakeel Butt
|
58056f7750 |
memcg, kmem: further deprecate kmem.limit_in_bytes
The deprecation process of kmem.limit_in_bytes started with the commit
|
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|
Juergen Gross
|
40fdea0284 |
xen/balloon: add late_initcall_sync() for initial ballooning done
When running as PVH or HVM guest with actual memory < max memory the hypervisor is using "populate on demand" in order to allow the guest to balloon down from its maximum memory size. For this to work correctly the guest must not touch more memory pages than its target memory size as otherwise the PoD cache will be exhausted and the guest is crashed as a result of that. In extreme cases ballooning down might not be finished today before the init process is started, which can consume lots of memory. In order to avoid random boot crashes in such cases, add a late init call to wait for ballooning down having finished for PVH/HVM guests. Warn on console if initial ballooning fails, panic() after stalling for more than 3 minutes per default. Add a module parameter for changing this timeout. [boris: replaced pr_info() with pr_notice()] Cc: <stable@vger.kernel.org> Reported-by: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com> Signed-off-by: Juergen Gross <jgross@suse.com> Link: https://lore.kernel.org/r/20211102091944.17487-1-jgross@suse.com Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> |
||
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Linus Torvalds
|
95faf6ba65 |
Driver core changes for 5.16-rc1
Here is the big set of driver core changes for 5.16-rc1.
All of these have been in linux-next for a while now with no reported
problems.
Included in here are:
- big update and cleanup of the sysfs abi documentation files
and scripts from Mauro. We are almost at the place where we
can properly check that the running kernel's sysfs abi is
documented fully.
- firmware loader updates
- dyndbg updates
- kernfs cleanups and fixes from Christoph
- device property updates
- component fix
- other minor driver core cleanups and fixes
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'driver-core-5.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core updates from Greg KH:
"Here is the big set of driver core changes for 5.16-rc1.
All of these have been in linux-next for a while now with no reported
problems.
Included in here are:
- big update and cleanup of the sysfs abi documentation files and
scripts from Mauro. We are almost at the place where we can
properly check that the running kernel's sysfs abi is documented
fully.
- firmware loader updates
- dyndbg updates
- kernfs cleanups and fixes from Christoph
- device property updates
- component fix
- other minor driver core cleanups and fixes"
* tag 'driver-core-5.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (122 commits)
device property: Drop redundant NULL checks
x86/build: Tuck away built-in firmware under FW_LOADER
vmlinux.lds.h: wrap built-in firmware support under FW_LOADER
firmware_loader: move struct builtin_fw to the only place used
x86/microcode: Use the firmware_loader built-in API
firmware_loader: remove old DECLARE_BUILTIN_FIRMWARE()
firmware_loader: formalize built-in firmware API
component: do not leave master devres group open after bind
dyndbg: refine verbosity 1-4 summary-detail
gpiolib: acpi: Replace custom code with device_match_acpi_handle()
i2c: acpi: Replace custom function with device_match_acpi_handle()
driver core: Provide device_match_acpi_handle() helper
dyndbg: fix spurious vNpr_info change
dyndbg: no vpr-info on empty queries
dyndbg: vpr-info on remove-module complete, not starting
device property: Add missed header in fwnode.h
Documentation: dyndbg: Improve cli param examples
dyndbg: Remove support for ddebug_query param
dyndbg: make dyndbg a known cli param
dyndbg: show module in vpr-info in dd-exec-queries
...
|
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Linus Torvalds
|
dcd68326d2 |
Devicetree updates for v5.16:
- Convert /reserved-memory bindings to schemas - Convert a bunch of NFC bindings to schemas - Convert bindings to schema: Xilinx USB, Freescale DDR controller, Arm CCI-400, UBlox Neo-6M, 1-Wire GPIO, MSI controller, ASpeed LPC, OMAP and Inside-Secure HWRNG, register-bit-led, OV5640, Silead GSL1680, Elan ekth3000, Marvell bluetooth, TI wlcore, TI bluetooth, ESP ESP8089, tlm,trusted-foundations, Microchip cap11xx, Ralink SoCs and boards, and TI sysc - New binding schemas for: msi-ranges, Aspeed UART routing controller, palmbus, Xylon LogiCVC display controller, Mediatek's MT7621 SDRAM memory controller, and Apple M1 PCIe host - Run schema checks for %.dtb targets - Improve build time when using DT_SCHEMA_FILES - Improve error message when dtschema is not found - Various doc reference fixes in MAINTAINERS - Convert architectures to common CPU h/w ID parsing function of_get_cpu_hwid(). - Allow for empty NUMA node IDs which may be hotplugged - Cleanup of __fdt_scan_reserved_mem() - Constify device_node parameters - Update dtc to upstream v1.6.1-19-g0a3a9d3449c8. Adds new checks 'node_name_vs_property_name' and 'interrupt_map'. - Enable dtc 'unit_address_format' warning by default - Fix unittest EXPECT text for gpio hog errors -----BEGIN PGP SIGNATURE----- iQJEBAABCgAuFiEEktVUI4SxYhzZyEuo+vtdtY28YcMFAmGBrj8QHHJvYmhAa2Vy bmVsLm9yZwAKCRD6+121jbxhw3M1D/9gpaVBqp+Q5hZZLWOjz/WkAsExZ71N/8Lh rn64XWYQNJ6R1PINkBtlooJy6wTCIMfNs3IEmkAVEXVEj1Nvu7uEZwYbb96B4dJ4 EiMv/Vz0EphoqnBvICT86XfNZduP1sZ5M11pdv2dNvwJrEvvi98VLDvSucvxorn8 sm5jsqWOAwroiCR+u8BWW3qH3sugL1BOAwraMoUbosZAo0SpNH4WBdcBz4+v8lUS 5N8Y8Q6dB6fEqdbVpzMblN2B9c/TEb1VYaeGXRUyQsIUQJajX3xnR8RDnTKLBtsS FAKGQORemLwVzBVKeZKbhlqXAJbl701LuKHRLiVerb9UGi+tk4AX9Rgg1Whrp7w4 UYi+k4Ozus1vDaKsemB1voabSgYYY+aNTRezltdtPz0a+eQJWPUt1xQB5m68cGO4 TZI+KfExxyGVa8iDgv4AWhvXqbR3+PUTUvel2xEIkRscWmMjXF/+oQXy8QYn2Aok S9750/3EUQCbKi9ZUjPLRzd5CuPP2E97i8V2WdOgRse3+H7pPg5IcEq7oQYe9A62 SnRFjPz1X5g4Hh3bRVmcAGmDzbZJrl9dULvYVdiUWiqzfmHxN7MXO9FIxv3NKVfp 6jgr5vVVi1ShDnCh3ns4mYUwQ7j72dsONyklbVBbNtGjeeZcv5MEeg9ZAoVvO+lh 9DNNSGSd2g== =dQa6 -----END PGP SIGNATURE----- Merge tag 'devicetree-for-5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux Pull devicetree updates from Rob Herring: - Convert /reserved-memory bindings to schemas - Convert a bunch of NFC bindings to schemas - Convert bindings to schema: Xilinx USB, Freescale DDR controller, Arm CCI-400, UBlox Neo-6M, 1-Wire GPIO, MSI controller, ASpeed LPC, OMAP and Inside-Secure HWRNG, register-bit-led, OV5640, Silead GSL1680, Elan ekth3000, Marvell bluetooth, TI wlcore, TI bluetooth, ESP ESP8089, tlm,trusted-foundations, Microchip cap11xx, Ralink SoCs and boards, and TI sysc - New binding schemas for: msi-ranges, Aspeed UART routing controller, palmbus, Xylon LogiCVC display controller, Mediatek's MT7621 SDRAM memory controller, and Apple M1 PCIe host - Run schema checks for %.dtb targets - Improve build time when using DT_SCHEMA_FILES - Improve error message when dtschema is not found - Various doc reference fixes in MAINTAINERS - Convert architectures to common CPU h/w ID parsing function of_get_cpu_hwid(). - Allow for empty NUMA node IDs which may be hotplugged - Cleanup of __fdt_scan_reserved_mem() - Constify device_node parameters - Update dtc to upstream v1.6.1-19-g0a3a9d3449c8. Adds new checks 'node_name_vs_property_name' and 'interrupt_map'. - Enable dtc 'unit_address_format' warning by default - Fix unittest EXPECT text for gpio hog errors * tag 'devicetree-for-5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (97 commits) dt-bindings: net: ti,bluetooth: Document default max-speed dt-bindings: pci: rcar-pci-ep: Document r8a7795 dt-bindings: net: qcom,ipa: IPA does support up to two iommus of/fdt: Remove of_scan_flat_dt() usage for __fdt_scan_reserved_mem() of: unittest: document intentional interrupt-map provider build warning of: unittest: fix EXPECT text for gpio hog errors of/unittest: Disable new dtc node_name_vs_property_name and interrupt_map warnings scripts/dtc: Update to upstream version v1.6.1-19-g0a3a9d3449c8 dt-bindings: arm: firmware: tlm,trusted-foundations: Convert txt bindings to yaml dt-bindings: display: tilcd: Fix endpoint addressing in example dt-bindings: input: microchip,cap11xx: Convert txt bindings to yaml dt-bindings: ufs: exynos-ufs: add exynosautov9 compatible dt-bindings: ufs: exynos-ufs: add io-coherency property dt-bindings: mips: convert Ralink SoCs and boards to schema dt-bindings: display: xilinx: Fix example with psgtr dt-bindings: net: nfc: nxp,pn544: Convert txt bindings to yaml dt-bindings: Add a help message when dtschema tools are missing dt-bindings: bus: ti-sysc: Update to use yaml binding dt-bindings: sram: Allow numbers in sram region node name dt-bindings: display: Document the Xylon LogiCVC display controller ... |
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Linus Torvalds
|
624ad333d4 |
This is a relatively unexciting cycle for documentation.
- Some small scripts/kerneldoc fixes - More Chinese translation work, but at a much reduced rate. - The tip-tree maintainer's handbook ...plus the usual array of build fixes, typo fixes, etc. -----BEGIN PGP SIGNATURE----- iQFDBAABCAAtFiEEIw+MvkEiF49krdp9F0NaE2wMflgFAmGBqbYPHGNvcmJldEBs d24ubmV0AAoJEBdDWhNsDH5YzMoH+wQwUbILvf4FB9h6l0qhbPnvcLMJtDiuIGSu Ivfc1t+Vh7/waehaYfn9erCNps6oE13Arsy0DDFZcr6vbjXFO5clFoh5jvSJsk+G zTXzZNB99SoJcZw9r8F7aJDbQNJfSXoyTTOg1mSeXNo+nkBFTSWO7QwCx5M2obaT 76+r8HQpnEYmrGePsOXriV4aOP+yJxuGgkPb+VPlPtQhA7v6dzo5hmoh5tPIzCLd Fz8ek4aAm9sPEtu1UUoA+7MALZHTFwPv6aSAuyVeNfF/UBL6M4iAwusQyLdPFfoj JPO7f+1h6a8jKTfTWGjPI3o33DtU/8nc6DgnuBaXBTKW8Dl5Exk= =q37Q -----END PGP SIGNATURE----- Merge tag 'docs-5.16' of git://git.lwn.net/linux Pull documentation updates from Jonathan Corbet: "This is a relatively unexciting cycle for documentation. - Some small scripts/kerneldoc fixes - More Chinese translation work, but at a much reduced rate. - The tip-tree maintainer's handbook ...plus the usual array of build fixes, typo fixes, etc" * tag 'docs-5.16' of git://git.lwn.net/linux: (53 commits) kernel-doc: support DECLARE_PHY_INTERFACE_MASK() docs/zh_CN: add core-api xarray translation docs/zh_CN: add core-api assoc_array translation speakup: Fix typo in documentation "boo" -> "boot" docs: submitting-patches: make section about the Link: tag more explicit docs: deprecated.rst: Clarify open-coded arithmetic with literals scripts: documentation-file-ref-check: fix bpf selftests path scripts: documentation-file-ref-check: ignore hidden files coding-style.rst: trivial: fix location of driver model macros docs: f2fs: fix text alignment docs/zh_CN add PCI pci.rst translation docs/zh_CN add PCI index.rst translation docs: translations: zh_CN: memory-hotplug.rst: fix a typo docs: translations: zn_CN: irq-affinity.rst: add a missing extension block: add documentation for inflight scripts: kernel-doc: Ignore __alloc_size() attribute docs: pdfdocs: Adjust \headheight for fancyhdr docs: UML: user_mode_linux_howto_v2 edits docs: use the lore redirector everywhere docs: proc.rst: mountinfo: align columns ... |
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|
Linus Torvalds
|
a85373fe44 |
Merge branch 'for-5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
Pull cgroup updates from Tejun Heo: - The misc controller now reports allocation rejections through misc.events instead of printking - cgroup_mutex usage is reduced to improve scalability of some operations - vhost helper threads are now assigned to the right cgroup on cgroup2 - Bug fixes * 'for-5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup: cgroup: bpf: Move wrapper for __cgroup_bpf_*() to kernel/bpf/cgroup.c cgroup: Fix rootcg cpu.stat guest double counting cgroup: no need for cgroup_mutex for /proc/cgroups cgroup: remove cgroup_mutex from cgroupstats_build cgroup: reduce dependency on cgroup_mutex cgroup: cgroup-v1: do not exclude cgrp_dfl_root cgroup: Make rebind_subsystems() disable v2 controllers all at once docs/cgroup: add entry for misc.events misc_cgroup: remove error log to avoid log flood misc_cgroup: introduce misc.events to count failures |
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Linus Torvalds
|
d7e0a795bf |
ARM:
* More progress on the protected VM front, now with the full
fixed feature set as well as the limitation of some hypercalls
after initialisation.
* Cleanup of the RAZ/WI sysreg handling, which was pointlessly
complicated
* Fixes for the vgic placement in the IPA space, together with a
bunch of selftests
* More memcg accounting of the memory allocated on behalf of a guest
* Timer and vgic selftests
* Workarounds for the Apple M1 broken vgic implementation
* KConfig cleanups
* New kvmarm.mode=none option, for those who really dislike us
RISC-V:
* New KVM port.
x86:
* New API to control TSC offset from userspace
* TSC scaling for nested hypervisors on SVM
* Switch masterclock protection from raw_spin_lock to seqcount
* Clean up function prototypes in the page fault code and avoid
repeated memslot lookups
* Convey the exit reason to userspace on emulation failure
* Configure time between NX page recovery iterations
* Expose Predictive Store Forwarding Disable CPUID leaf
* Allocate page tracking data structures lazily (if the i915
KVM-GT functionality is not compiled in)
* Cleanups, fixes and optimizations for the shadow MMU code
s390:
* SIGP Fixes
* initial preparations for lazy destroy of secure VMs
* storage key improvements/fixes
* Log the guest CPNC
Starting from this release, KVM-PPC patches will come from
Michael Ellerman's PPC tree.
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull KVM updates from Paolo Bonzini:
"ARM:
- More progress on the protected VM front, now with the full fixed
feature set as well as the limitation of some hypercalls after
initialisation.
- Cleanup of the RAZ/WI sysreg handling, which was pointlessly
complicated
- Fixes for the vgic placement in the IPA space, together with a
bunch of selftests
- More memcg accounting of the memory allocated on behalf of a guest
- Timer and vgic selftests
- Workarounds for the Apple M1 broken vgic implementation
- KConfig cleanups
- New kvmarm.mode=none option, for those who really dislike us
RISC-V:
- New KVM port.
x86:
- New API to control TSC offset from userspace
- TSC scaling for nested hypervisors on SVM
- Switch masterclock protection from raw_spin_lock to seqcount
- Clean up function prototypes in the page fault code and avoid
repeated memslot lookups
- Convey the exit reason to userspace on emulation failure
- Configure time between NX page recovery iterations
- Expose Predictive Store Forwarding Disable CPUID leaf
- Allocate page tracking data structures lazily (if the i915 KVM-GT
functionality is not compiled in)
- Cleanups, fixes and optimizations for the shadow MMU code
s390:
- SIGP Fixes
- initial preparations for lazy destroy of secure VMs
- storage key improvements/fixes
- Log the guest CPNC
Starting from this release, KVM-PPC patches will come from Michael
Ellerman's PPC tree"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (227 commits)
RISC-V: KVM: fix boolreturn.cocci warnings
RISC-V: KVM: remove unneeded semicolon
RISC-V: KVM: Fix GPA passed to __kvm_riscv_hfence_gvma_xyz() functions
RISC-V: KVM: Factor-out FP virtualization into separate sources
KVM: s390: add debug statement for diag 318 CPNC data
KVM: s390: pv: properly handle page flags for protected guests
KVM: s390: Fix handle_sske page fault handling
KVM: x86: SGX must obey the KVM_INTERNAL_ERROR_EMULATION protocol
KVM: x86: On emulation failure, convey the exit reason, etc. to userspace
KVM: x86: Get exit_reason as part of kvm_x86_ops.get_exit_info
KVM: x86: Clarify the kvm_run.emulation_failure structure layout
KVM: s390: Add a routine for setting userspace CPU state
KVM: s390: Simplify SIGP Set Arch handling
KVM: s390: pv: avoid stalls when making pages secure
KVM: s390: pv: avoid stalls for kvm_s390_pv_init_vm
KVM: s390: pv: avoid double free of sida page
KVM: s390: pv: add macros for UVC CC values
s390/mm: optimize reset_guest_reference_bit()
s390/mm: optimize set_guest_storage_key()
s390/mm: no need for pte_alloc_map_lock() if we know the pmd is present
...
|
||
|
Linus Torvalds
|
73d21a3579 |
media updates for v5.16-rc1
-----BEGIN PGP SIGNATURE----- iQIzBAABCAAdFiEE+QmuaPwR3wnBdVwACF8+vY7k4RUFAmF/qI0ACgkQCF8+vY7k 4RWt1A//QSrYq6cxSzdEB+Jr6sZ4ToD2Lhp+Iq4vBMjeWljmIXLmsez7JHqTw2us sYocQS4tHUht6Y3T+ZV7dM2KWzKZfv18qKz1h2u36QuEfGN8y3PYGcBF4MQMmVpw gznqZb8bWS2onIDKSwn5BW7VRmc/HwRk0k9lXwJ7RuN7UX6zkAWhMUlEA7MiztfF DeTQ7KTWqc6v3xzYZ8BHBSOm+GPxvG7oiZv839cFfkNWsgz2ETJYBUvBQdgoWvbC uE5P+0/U+VoksRCuKzItltJQKaUsrXPDKODtA/UvWFr8NfTN7SAa8EsWbzC/cgBo 8caHuhz++aYCfKZ6+rpwZ9oRY0BTnVXI52K0qC+NtsybU4pIDueZqwcYfo6bZr46 XQXoFELOV6wkC7dHZ0+pFC3Lrqm5qXM3tmtITHOk8Xp1aPAzvTMMj4+mL3CawnXZ YH+ViKfadGdQ7gQb6ybbxwl1bvhGdSd1Pg8twYwO8yo3UHl2KI1iPKg7s9sDJupg npUUFNacyuv1+cSgEy4xqtiO+j6eoRBjYoj/Nv2D8tF8mJ3IZsf2JS+aIVqEAvg0 d7M1IEFdvsPxgwnFMoOInr3mOZf2om6gTXVY71y01S1EbSfOqv/UG9mVZS1VMhJK Z3oigVDsujYJbGRWRomQTNhNxlsgpvGf3dTYSViLAH05CgtEIY0= =eLup -----END PGP SIGNATURE----- Merge tag 'media/v5.16-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media Pull media updates from Mauro Carvalho Chehab: - New driver for SK Hynix Hi-846 8M pixel camera - New driver for the ov13b10 camera - New driver for Renesas R-Car ISP - mtk-vcodec gained support for version 2 of decoder firmware ABI - The legacy sir_ir driver got removed - videobuf2: the vb2_mem_ops kAPI had some improvements - lots of cleanups, fixes and new features at device drivers * tag 'media/v5.16-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (328 commits) media: venus: core: Add sdm660 DT compatible and resource struct media: dt-bindings: media: venus: Add sdm660 dt schema media: venus: vdec: decoded picture buffer handling during reconfig sequence media: venus: Handle fatal errors during encoding and decoding media: venus: helpers: Add helper to mark fatal vb2 error media: venus: hfi: Check for sys error on session hfi functions media: venus: Make sys_error flag an atomic bitops media: venus: venc: Use pmruntime autosuspend media: allegro: write vui parameters for HEVC media: allegro: nal-hevc: implement generator for vui media: allegro: write correct colorspace into SPS media: allegro: extract nal value lookup functions to header media: allegro: correctly scale the bit rate in SPS media: allegro: remove external QP table media: allegro: fix row and column in response message media: allegro: add control to disable encoder buffer media: allegro: add encoder buffer support media: allegro: add pm_runtime support media: allegro: lookup VCU settings media: allegro: fix module removal if initialization failed ... |
||
|
Linus Torvalds
|
a5a9e00605 |
seccomp updates for v5.16-rc1
- set spec_store_bypass_disable & spectre_v2_user to prctl (Andrea Arcangeli) -----BEGIN PGP SIGNATURE----- iQJKBAABCgA0FiEEpcP2jyKd1g9yPm4TiXL039xtwCYFAmGAGAkWHGtlZXNjb29r QGNocm9taXVtLm9yZwAKCRCJcvTf3G3AJqOWD/4mMFp84IMa/VdCmD6PS+BhisyI i7+Hyfisg8AWpjgW4+JihU/6hfsDgs/hNNKbiIopcwc/12KV4M0QIQyF7vmceSwB uMsAX7pkobNUUisnrQVbw6boK4hrBvrV3STlVdRHvNlLeQLQIu4UN3+9UMj/qsmh 46ltdxR489oDDLXFgMkKq9auVP2t5t4fbyRmgBPLSKIXaOxIhWck3kUQwt/Rbr44 M87/Xr4iQ0w4ddiBFJz9GOHQ5Iz08ms4dBfO+e5FSl6I69Nt6q836el35c/6j4y8 r7C21WU088MSkjk75RCa3v2sq8db2CjLe+wBugq+yYC29qGgxtTiUZaoiNQCN5bL DIRfl1iU5Ge1wEKorpr3DR6DksmfJO4MNPdMo4CcVZT3Gkdi7udLHfrEI82xgdDl lh1UiJlRx4YNEcDbGBnxCzKGwauqHa2TgPNWulUPdH7OGhUL86FAV49L84uz9lCD C/+PKxDqc2XKjbgqMsbuyQ7hzB2KQK/ieEXzduoHxTxIr5vO/viENrbkUiSL8bsO 6msCVbCIjtFDvW4Ac16IOwGoflJ7vLAIuXIdAYCeN+JXqOVV+FG/MN447Y674FeH R84G6JCT82ULEXrKlwuoSSVJEwA5lzP4IwoWm/ujeUbzi1s+7m+7WRpuJe2jZm6c zPsCVkNPUrvp82L/wA== =NAsc -----END PGP SIGNATURE----- Merge tag 'seccomp-v5.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux Pull seccomp updates from Kees Cook: "These are x86-specific, but I carried these since they're also seccomp-specific. This flips the defaults for spec_store_bypass_disable and spectre_v2_user from "seccomp" to "prctl", as enough time has passed to allow system owners to have updated the defensive stances of their various workloads, and it's long overdue to unpessimize seccomp threads. Extensive rationale and details are in Andrea's main patch. Summary: - set spec_store_bypass_disable & spectre_v2_user to prctl (Andrea Arcangeli)" * tag 'seccomp-v5.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: x86: deduplicate the spectre_v2_user documentation x86: change default to spec_store_bypass_disable=prctl spectre_v2_user=prctl |
||
|
Linus Torvalds
|
8cb1ae19bf |
x86/fpu updates:
- Cleanup of extable fixup handling to be more robust, which in turn
allows to make the FPU exception fixups more robust as well.
- Change the return code for signal frame related failures from explicit
error codes to a boolean fail/success as that's all what the calling
code evaluates.
- A large refactoring of the FPU code to prepare for adding AMX support:
- Distangle the public header maze and remove especially the misnomed
kitchen sink internal.h which is despite it's name included all over
the place.
- Add a proper abstraction for the register buffer storage (struct
fpstate) which allows to dynamically size the buffer at runtime by
flipping the pointer to the buffer container from the default
container which is embedded in task_struct::tread::fpu to a
dynamically allocated container with a larger register buffer.
- Convert the code over to the new fpstate mechanism.
- Consolidate the KVM FPU handling by moving the FPU related code into
the FPU core which removes the number of exports and avoids adding
even more export when AMX has to be supported in KVM. This also
removes duplicated code which was of course unnecessary different and
incomplete in the KVM copy.
- Simplify the KVM FPU buffer handling by utilizing the new fpstate
container and just switching the buffer pointer from the user space
buffer to the KVM guest buffer when entering vcpu_run() and flipping
it back when leaving the function. This cuts the memory requirements
of a vCPU for FPU buffers in half and avoids pointless memory copy
operations.
This also solves the so far unresolved problem of adding AMX support
because the current FPU buffer handling of KVM inflicted a circular
dependency between adding AMX support to the core and to KVM. With
the new scheme of switching fpstate AMX support can be added to the
core code without affecting KVM.
- Replace various variables with proper data structures so the extra
information required for adding dynamically enabled FPU features (AMX)
can be added in one place
- Add AMX (Advanved Matrix eXtensions) support (finally):
AMX is a large XSTATE component which is going to be available with
Saphire Rapids XEON CPUs. The feature comes with an extra MSR (MSR_XFD)
which allows to trap the (first) use of an AMX related instruction,
which has two benefits:
1) It allows the kernel to control access to the feature
2) It allows the kernel to dynamically allocate the large register
state buffer instead of burdening every task with the the extra 8K
or larger state storage.
It would have been great to gain this kind of control already with
AVX512.
The support comes with the following infrastructure components:
1) arch_prctl() to
- read the supported features (equivalent to XGETBV(0))
- read the permitted features for a task
- request permission for a dynamically enabled feature
Permission is granted per process, inherited on fork() and cleared
on exec(). The permission policy of the kernel is restricted to
sigaltstack size validation, but the syscall obviously allows
further restrictions via seccomp etc.
2) A stronger sigaltstack size validation for sys_sigaltstack(2) which
takes granted permissions and the potentially resulting larger
signal frame into account. This mechanism can also be used to
enforce factual sigaltstack validation independent of dynamic
features to help with finding potential victims of the 2K
sigaltstack size constant which is broken since AVX512 support was
added.
3) Exception handling for #NM traps to catch first use of a extended
feature via a new cause MSR. If the exception was caused by the use
of such a feature, the handler checks permission for that
feature. If permission has not been granted, the handler sends a
SIGILL like the #UD handler would do if the feature would have been
disabled in XCR0. If permission has been granted, then a new fpstate
which fits the larger buffer requirement is allocated.
In the unlikely case that this allocation fails, the handler sends
SIGSEGV to the task. That's not elegant, but unavoidable as the
other discussed options of preallocation or full per task
permissions come with their own set of horrors for kernel and/or
userspace. So this is the lesser of the evils and SIGSEGV caused by
unexpected memory allocation failures is not a fundamentally new
concept either.
When allocation succeeds, the fpstate properties are filled in to
reflect the extended feature set and the resulting sizes, the
fpu::fpstate pointer is updated accordingly and the trap is disarmed
for this task permanently.
4) Enumeration and size calculations
5) Trap switching via MSR_XFD
The XFD (eXtended Feature Disable) MSR is context switched with the
same life time rules as the FPU register state itself. The mechanism
is keyed off with a static key which is default disabled so !AMX
equipped CPUs have zero overhead. On AMX enabled CPUs the overhead
is limited by comparing the tasks XFD value with a per CPU shadow
variable to avoid redundant MSR writes. In case of switching from a
AMX using task to a non AMX using task or vice versa, the extra MSR
write is obviously inevitable.
All other places which need to be aware of the variable feature sets
and resulting variable sizes are not affected at all because they
retrieve the information (feature set, sizes) unconditonally from
the fpstate properties.
6) Enable the new AMX states
Note, this is relatively new code despite the fact that AMX support is in
the works for more than a year now.
The big refactoring of the FPU code, which allowed to do a proper
integration has been started exactly 3 weeks ago. Refactoring of the
existing FPU code and of the original AMX patches took a week and has
been subject to extensive review and testing. The only fallout which has
not been caught in review and testing right away was restricted to AMX
enabled systems, which is completely irrelevant for anyone outside Intel
and their early access program. There might be dragons lurking as usual,
but so far the fine grained refactoring has held up and eventual yet
undetected fallout is bisectable and should be easily addressable before
the 5.16 release. Famous last words...
Many thanks to Chang Bae and Dave Hansen for working hard on this and
also to the various test teams at Intel who reserved extra capacity to
follow the rapid development of this closely which provides the
confidence level required to offer this rather large update for inclusion
into 5.16-rc1.
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Merge tag 'x86-fpu-2021-11-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fpu updates from Thomas Gleixner:
- Cleanup of extable fixup handling to be more robust, which in turn
allows to make the FPU exception fixups more robust as well.
- Change the return code for signal frame related failures from
explicit error codes to a boolean fail/success as that's all what the
calling code evaluates.
- A large refactoring of the FPU code to prepare for adding AMX
support:
- Distangle the public header maze and remove especially the
misnomed kitchen sink internal.h which is despite it's name
included all over the place.
- Add a proper abstraction for the register buffer storage (struct
fpstate) which allows to dynamically size the buffer at runtime
by flipping the pointer to the buffer container from the default
container which is embedded in task_struct::tread::fpu to a
dynamically allocated container with a larger register buffer.
- Convert the code over to the new fpstate mechanism.
- Consolidate the KVM FPU handling by moving the FPU related code
into the FPU core which removes the number of exports and avoids
adding even more export when AMX has to be supported in KVM.
This also removes duplicated code which was of course
unnecessary different and incomplete in the KVM copy.
- Simplify the KVM FPU buffer handling by utilizing the new
fpstate container and just switching the buffer pointer from the
user space buffer to the KVM guest buffer when entering
vcpu_run() and flipping it back when leaving the function. This
cuts the memory requirements of a vCPU for FPU buffers in half
and avoids pointless memory copy operations.
This also solves the so far unresolved problem of adding AMX
support because the current FPU buffer handling of KVM inflicted
a circular dependency between adding AMX support to the core and
to KVM. With the new scheme of switching fpstate AMX support can
be added to the core code without affecting KVM.
- Replace various variables with proper data structures so the
extra information required for adding dynamically enabled FPU
features (AMX) can be added in one place
- Add AMX (Advanced Matrix eXtensions) support (finally):
AMX is a large XSTATE component which is going to be available with
Saphire Rapids XEON CPUs. The feature comes with an extra MSR
(MSR_XFD) which allows to trap the (first) use of an AMX related
instruction, which has two benefits:
1) It allows the kernel to control access to the feature
2) It allows the kernel to dynamically allocate the large register
state buffer instead of burdening every task with the the extra
8K or larger state storage.
It would have been great to gain this kind of control already with
AVX512.
The support comes with the following infrastructure components:
1) arch_prctl() to
- read the supported features (equivalent to XGETBV(0))
- read the permitted features for a task
- request permission for a dynamically enabled feature
Permission is granted per process, inherited on fork() and
cleared on exec(). The permission policy of the kernel is
restricted to sigaltstack size validation, but the syscall
obviously allows further restrictions via seccomp etc.
2) A stronger sigaltstack size validation for sys_sigaltstack(2)
which takes granted permissions and the potentially resulting
larger signal frame into account. This mechanism can also be used
to enforce factual sigaltstack validation independent of dynamic
features to help with finding potential victims of the 2K
sigaltstack size constant which is broken since AVX512 support
was added.
3) Exception handling for #NM traps to catch first use of a extended
feature via a new cause MSR. If the exception was caused by the
use of such a feature, the handler checks permission for that
feature. If permission has not been granted, the handler sends a
SIGILL like the #UD handler would do if the feature would have
been disabled in XCR0. If permission has been granted, then a new
fpstate which fits the larger buffer requirement is allocated.
In the unlikely case that this allocation fails, the handler
sends SIGSEGV to the task. That's not elegant, but unavoidable as
the other discussed options of preallocation or full per task
permissions come with their own set of horrors for kernel and/or
userspace. So this is the lesser of the evils and SIGSEGV caused
by unexpected memory allocation failures is not a fundamentally
new concept either.
When allocation succeeds, the fpstate properties are filled in to
reflect the extended feature set and the resulting sizes, the
fpu::fpstate pointer is updated accordingly and the trap is
disarmed for this task permanently.
4) Enumeration and size calculations
5) Trap switching via MSR_XFD
The XFD (eXtended Feature Disable) MSR is context switched with
the same life time rules as the FPU register state itself. The
mechanism is keyed off with a static key which is default
disabled so !AMX equipped CPUs have zero overhead. On AMX enabled
CPUs the overhead is limited by comparing the tasks XFD value
with a per CPU shadow variable to avoid redundant MSR writes. In
case of switching from a AMX using task to a non AMX using task
or vice versa, the extra MSR write is obviously inevitable.
All other places which need to be aware of the variable feature
sets and resulting variable sizes are not affected at all because
they retrieve the information (feature set, sizes) unconditonally
from the fpstate properties.
6) Enable the new AMX states
Note, this is relatively new code despite the fact that AMX support
is in the works for more than a year now.
The big refactoring of the FPU code, which allowed to do a proper
integration has been started exactly 3 weeks ago. Refactoring of the
existing FPU code and of the original AMX patches took a week and has
been subject to extensive review and testing. The only fallout which
has not been caught in review and testing right away was restricted
to AMX enabled systems, which is completely irrelevant for anyone
outside Intel and their early access program. There might be dragons
lurking as usual, but so far the fine grained refactoring has held up
and eventual yet undetected fallout is bisectable and should be
easily addressable before the 5.16 release. Famous last words...
Many thanks to Chang Bae and Dave Hansen for working hard on this and
also to the various test teams at Intel who reserved extra capacity
to follow the rapid development of this closely which provides the
confidence level required to offer this rather large update for
inclusion into 5.16-rc1
* tag 'x86-fpu-2021-11-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (110 commits)
Documentation/x86: Add documentation for using dynamic XSTATE features
x86/fpu: Include vmalloc.h for vzalloc()
selftests/x86/amx: Add context switch test
selftests/x86/amx: Add test cases for AMX state management
x86/fpu/amx: Enable the AMX feature in 64-bit mode
x86/fpu: Add XFD handling for dynamic states
x86/fpu: Calculate the default sizes independently
x86/fpu/amx: Define AMX state components and have it used for boot-time checks
x86/fpu/xstate: Prepare XSAVE feature table for gaps in state component numbers
x86/fpu/xstate: Add fpstate_realloc()/free()
x86/fpu/xstate: Add XFD #NM handler
x86/fpu: Update XFD state where required
x86/fpu: Add sanity checks for XFD
x86/fpu: Add XFD state to fpstate
x86/msr-index: Add MSRs for XFD
x86/cpufeatures: Add eXtended Feature Disabling (XFD) feature bit
x86/fpu: Reset permission and fpstate on exec()
x86/fpu: Prepare fpu_clone() for dynamically enabled features
x86/fpu/signal: Prepare for variable sigframe length
x86/signal: Use fpu::__state_user_size for sigalt stack validation
...
|
||
|
Linus Torvalds
|
9a7e0a90a4 |
Scheduler updates:
- Revert the printk format based wchan() symbol resolution as it can leak
the raw value in case that the symbol is not resolvable.
- Make wchan() more robust and work with all kind of unwinders by
enforcing that the task stays blocked while unwinding is in progress.
- Prevent sched_fork() from accessing an invalid sched_task_group
- Improve asymmetric packing logic
- Extend scheduler statistics to RT and DL scheduling classes and add
statistics for bandwith burst to the SCHED_FAIR class.
- Properly account SCHED_IDLE entities
- Prevent a potential deadlock when initial priority is assigned to a
newly created kthread. A recent change to plug a race between cpuset and
__sched_setscheduler() introduced a new lock dependency which is now
triggered. Break the lock dependency chain by moving the priority
assignment to the thread function.
- Fix the idle time reporting in /proc/uptime for NOHZ enabled systems.
- Improve idle balancing in general and especially for NOHZ enabled
systems.
- Provide proper interfaces for live patching so it does not have to
fiddle with scheduler internals.
- Add cluster aware scheduling support.
- A small set of tweaks for RT (irqwork, wait_task_inactive(), various
scheduler options and delaying mmdrop)
- The usual small tweaks and improvements all over the place
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Merge tag 'sched-core-2021-11-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler updates from Thomas Gleixner:
- Revert the printk format based wchan() symbol resolution as it can
leak the raw value in case that the symbol is not resolvable.
- Make wchan() more robust and work with all kind of unwinders by
enforcing that the task stays blocked while unwinding is in progress.
- Prevent sched_fork() from accessing an invalid sched_task_group
- Improve asymmetric packing logic
- Extend scheduler statistics to RT and DL scheduling classes and add
statistics for bandwith burst to the SCHED_FAIR class.
- Properly account SCHED_IDLE entities
- Prevent a potential deadlock when initial priority is assigned to a
newly created kthread. A recent change to plug a race between cpuset
and __sched_setscheduler() introduced a new lock dependency which is
now triggered. Break the lock dependency chain by moving the priority
assignment to the thread function.
- Fix the idle time reporting in /proc/uptime for NOHZ enabled systems.
- Improve idle balancing in general and especially for NOHZ enabled
systems.
- Provide proper interfaces for live patching so it does not have to
fiddle with scheduler internals.
- Add cluster aware scheduling support.
- A small set of tweaks for RT (irqwork, wait_task_inactive(), various
scheduler options and delaying mmdrop)
- The usual small tweaks and improvements all over the place
* tag 'sched-core-2021-11-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (69 commits)
sched/fair: Cleanup newidle_balance
sched/fair: Remove sysctl_sched_migration_cost condition
sched/fair: Wait before decaying max_newidle_lb_cost
sched/fair: Skip update_blocked_averages if we are defering load balance
sched/fair: Account update_blocked_averages in newidle_balance cost
x86: Fix __get_wchan() for !STACKTRACE
sched,x86: Fix L2 cache mask
sched/core: Remove rq_relock()
sched: Improve wake_up_all_idle_cpus() take #2
irq_work: Also rcuwait for !IRQ_WORK_HARD_IRQ on PREEMPT_RT
irq_work: Handle some irq_work in a per-CPU thread on PREEMPT_RT
irq_work: Allow irq_work_sync() to sleep if irq_work() no IRQ support.
sched/rt: Annotate the RT balancing logic irqwork as IRQ_WORK_HARD_IRQ
sched: Add cluster scheduler level for x86
sched: Add cluster scheduler level in core and related Kconfig for ARM64
topology: Represent clusters of CPUs within a die
sched: Disable -Wunused-but-set-variable
sched: Add wrapper for get_wchan() to keep task blocked
x86: Fix get_wchan() to support the ORC unwinder
proc: Use task_is_running() for wchan in /proc/$pid/stat
...
|
||
|
J. Bruce Fields
|
6d91929a6f |
nfsd: document server-to-server-copy parameters
Signed-off-by: J. Bruce Fields <bfields@redhat.com> |
||
|
Colin Ian King
|
d64fbe9f50 |
speakup: Fix typo in documentation "boo" -> "boot"
There is a typo in the speakup documentation. Fix it. Signed-off-by: Colin Ian King <colin.i.king@gmail.com> Reviewed-by: Samuel Thibault <samuel.thibault@ens-lyon.org> Link: https://lore.kernel.org/r/20211028182319.613315-1-colin.i.king@gmail.com Signed-off-by: Jonathan Corbet <corbet@lwn.net> |
||
|
Gabriel Krisman Bertazi
|
9abeae5d44 |
docs: Fix formatting of literal sections in fanotify docs
Stephen Rothwell reported the following warning was introduced by commit
|
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|
Paolo Bonzini
|
4e33868433 |
KVM/arm64 updates for Linux 5.16
- More progress on the protected VM front, now with the full fixed feature set as well as the limitation of some hypercalls after initialisation. - Cleanup of the RAZ/WI sysreg handling, which was pointlessly complicated - Fixes for the vgic placement in the IPA space, together with a bunch of selftests - More memcg accounting of the memory allocated on behalf of a guest - Timer and vgic selftests - Workarounds for the Apple M1 broken vgic implementation - KConfig cleanups - New kvmarm.mode=none option, for those who really dislike us -----BEGIN PGP SIGNATURE----- iQJDBAABCgAtFiEEn9UcU+C1Yxj9lZw9I9DQutE9ekMFAmF7u5YPHG1hekBrZXJu ZWwub3JnAAoJECPQ0LrRPXpD6w8QAIKDLJCTqkxv5Vh4ZSmtXxg4gTZMBlg8oSQ8 sVL639aqBvFe3A6Vmz6IwBm+NT7Sm1zxkuH9qHzVR1gmXq0oLYNrIuyrzRW8PvqO hIkSRRoVsf03755TmkxwR7/2jAFxb6FhEVAy6VWdQyI44orihIPvMp8aTIq+jvU+ XoNGb/rPf9HpSUtvuaHYvZhSZBhoi5dRnkr33R1+VR69n7Axs8lm905xcl6Pt0a0 QqYZWQvFu/BXPyNflG7LUsegRF/iiV2vNTbNNowkzlV5suqxBpJAp6ApDL/gWrHv ya/6cMqicSjBIkWnawhXY98w6/5xfzK4IV/zc00FNWOlUdVP89Thqrgc8EkigS9R BGcxFFqj41snr+ensSBBIkNtV+dBX52H3rUE0F9seiTXm8QWI86JobdeNadT8tUP TXdOeCUcA+cp4Ngln18lsbOEaBkPA5H1po1nUFPHbKnVOxnqXScB7E/xF6rAbryV m+Z+oidU7MyS/Ev/Da0ww/XFx7cs2ez9EgeQvjcdFAvUMqS6kcXEExvgGYlm+KRQ GBMKPLCNHKdflMANoSpol7MZUmPJ45XoWKW1rntj2r9X+oJW2Z2hEx32xrWDJdqK ixnbjog5kNZb0CjLGsUC90lo2hpRJecaLhAjgTLYaNC1QxGPrt92eat6gnwuMTBc mpADqi7w =qBAO -----END PGP SIGNATURE----- Merge tag 'kvmarm-5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD KVM/arm64 updates for Linux 5.16 - More progress on the protected VM front, now with the full fixed feature set as well as the limitation of some hypercalls after initialisation. - Cleanup of the RAZ/WI sysreg handling, which was pointlessly complicated - Fixes for the vgic placement in the IPA space, together with a bunch of selftests - More memcg accounting of the memory allocated on behalf of a guest - Timer and vgic selftests - Workarounds for the Apple M1 broken vgic implementation - KConfig cleanups - New kvmarm.mode=none option, for those who really dislike us |
||
|
Gabriel Krisman Bertazi
|
c0baf9ac0b |
docs: Document the FAN_FS_ERROR event
Document the FAN_FS_ERROR event for user administrators and user space developers. Link: https://lore.kernel.org/r/20211025192746.66445-32-krisman@collabora.com Reviewed-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.com> Reviewed-by: Jan Kara <jack@suse.cz> Signed-off-by: Jan Kara <jack@suse.cz> |
||
|
Niklas Schnelle
|
6aefbf1cdf |
s390/pci: add s390_iommu_aperture kernel parameter
Some applications map the same memory area for DMA multiple times while also mapping significant amounts of memory. With our current DMA code these applications will run out of DMA addresses after mapping half of the available memory because the number of DMA mappings is constrained by the number of concurrently active DMA addresses we support which in turn is limited by the minimum of hardware constraints and high_memory. Limiting the number of active DMA addresses to high_memory is only a heuristic to save memory used by the iommu_bitmap and DMA page tables however. This was added under the assumption that it rarely makes sense to DMA map more than system memory. To accommodate special applications which insist on double mapping, which works on other platforms, allow specifying a factor of how many times installed memory is available as DMA address space. Use 0 as a special value to apply no constraints beyond what hardware dictates at the expense of significantly more memory use. Reviewed-by: Matthew Rosato <mjrosato@linux.ibm.com> Reviewed-by: Pierre Morel <pmorel@linux.ibm.com> Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com> |
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Thomas Gleixner
|
3aac3ebea0 |
x86/signal: Implement sigaltstack size validation
For historical reasons MINSIGSTKSZ is a constant which became already too
small with AVX512 support.
Add a mechanism to enforce strict checking of the sigaltstack size against
the real size of the FPU frame.
The strict check can be enabled via a config option and can also be
controlled via the kernel command line option 'strict_sas_size' independent
of the config switch.
Enabling it might break existing applications which allocate a too small
sigaltstack but 'work' because they never get a signal delivered. Though it
can be handy to filter out binaries which are not yet aware of
AT_MINSIGSTKSZ.
Also the upcoming support for dynamically enabled FPU features requires a
strict sanity check to ensure that:
- Enabling of a dynamic feature, which changes the sigframe size fits
into an enabled sigaltstack
- Installing a too small sigaltstack after a dynamic feature has been
added is not possible.
Implement the base check which is controlled by config and command line
options.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Chang S. Bae <chang.seok.bae@intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20211021225527.10184-3-chang.seok.bae@intel.com
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Junaid Shahid
|
4dfe4f40d8 |
kvm: x86: mmu: Make NX huge page recovery period configurable
Currently, the NX huge page recovery thread wakes up every minute and zaps 1/nx_huge_pages_recovery_ratio of the total number of split NX huge pages at a time. This is intended to ensure that only a relatively small number of pages get zapped at a time. But for very large VMs (or more specifically, VMs with a large number of executable pages), a period of 1 minute could still result in this number being too high (unless the ratio is changed significantly, but that can result in split pages lingering on for too long). This change makes the period configurable instead of fixing it at 1 minute. Users of large VMs can then adjust the period and/or the ratio to reduce the number of pages zapped at one time while still maintaining the same overall duration for cycling through the entire list. By default, KVM derives a period from the ratio such that a page will remain on the list for 1 hour on average. Signed-off-by: Junaid Shahid <junaids@google.com> Message-Id: <20211020010627.305925-1-junaids@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> |
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Jim Cromie
|
09ee10ff80 |
dyndbg: refine verbosity 1-4 summary-detail
adjust current v*pr_info() calls to fit an overview..detail scheme:
1- module level activity: add/remove, etc
2- command ingest, splitting, summary of effects.
per >control write
3- command parsing: op, flags, search terms
4- per-site change msg
can yield ~3k x 2 logs per echo "+p;-p" > command.
Summarize these 4 levels in MODULE_PARM_DESC, and update verbose=3 in Doc.
2- is new, to isolate a problem where a stress-test script (which
feeds ~4kb multi-command strings) would produce short writes,
truncating last command and causing parsing errors, which confused
test results. The script fix was to use syswrite, to deliver full
proper commands.
4- gets per-callsite "changed:" pr-infos, which are very noisy during
stress tests, and formerly obscured v1-3 messages, and overwhelmed the
static-key workload being tested.
The verbose parameter has previously seen adjustment:
commit
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Mauro Carvalho Chehab
|
fad956fc5c |
dt-bindings: reserved-memory: ramoops: update ramoops.yaml references
Changeset |
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Greg Kroah-Hartman
|
b5bc8ac25a |
Merge 5.15-rc6 into driver-core-next
We need the driver-core fixes in here as well. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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Jonathan Cameron
|
c5e22feffd |
topology: Represent clusters of CPUs within a die
Both ACPI and DT provide the ability to describe additional layers of
topology between that of individual cores and higher level constructs
such as the level at which the last level cache is shared.
In ACPI this can be represented in PPTT as a Processor Hierarchy
Node Structure [1] that is the parent of the CPU cores and in turn
has a parent Processor Hierarchy Nodes Structure representing
a higher level of topology.
For example Kunpeng 920 has 6 or 8 clusters in each NUMA node, and each
cluster has 4 cpus. All clusters share L3 cache data, but each cluster
has local L3 tag. On the other hand, each clusters will share some
internal system bus.
+-----------------------------------+ +---------+
| +------+ +------+ +--------------------------+ |
| | CPU0 | | cpu1 | | +-----------+ | |
| +------+ +------+ | | | | |
| +----+ L3 | | |
| +------+ +------+ cluster | | tag | | |
| | CPU2 | | CPU3 | | | | | |
| +------+ +------+ | +-----------+ | |
| | | |
+-----------------------------------+ | |
+-----------------------------------+ | |
| +------+ +------+ +--------------------------+ |
| | | | | | +-----------+ | |
| +------+ +------+ | | | | |
| | | L3 | | |
| +------+ +------+ +----+ tag | | |
| | | | | | | | | |
| +------+ +------+ | +-----------+ | |
| | | |
+-----------------------------------+ | L3 |
| data |
+-----------------------------------+ | |
| +------+ +------+ | +-----------+ | |
| | | | | | | | | |
| +------+ +------+ +----+ L3 | | |
| | | tag | | |
| +------+ +------+ | | | | |
| | | | | | +-----------+ | |
| +------+ +------+ +--------------------------+ |
+-----------------------------------| | |
+-----------------------------------| | |
| +------+ +------+ +--------------------------+ |
| | | | | | +-----------+ | |
| +------+ +------+ | | | | |
| +----+ L3 | | |
| +------+ +------+ | | tag | | |
| | | | | | | | | |
| +------+ +------+ | +-----------+ | |
| | | |
+-----------------------------------+ | |
+-----------------------------------+ | |
| +------+ +------+ +--------------------------+ |
| | | | | | +-----------+ | |
| +------+ +------+ | | | | |
| | | L3 | | |
| +------+ +------+ +---+ tag | | |
| | | | | | | | | |
| +------+ +------+ | +-----------+ | |
| | | |
+-----------------------------------+ | |
+-----------------------------------+ | |
| +------+ +------+ +--------------------------+ |
| | | | | | +-----------+ | |
| +------+ +------+ | | | | |
| | | L3 | | |
| +------+ +------+ +--+ tag | | |
| | | | | | | | | |
| +------+ +------+ | +-----------+ | |
| | +---------+
+-----------------------------------+
That means spreading tasks among clusters will bring more bandwidth
while packing tasks within one cluster will lead to smaller cache
synchronization latency. So both kernel and userspace will have
a chance to leverage this topology to deploy tasks accordingly to
achieve either smaller cache latency within one cluster or an even
distribution of load among clusters for higher throughput.
This patch exposes cluster topology to both kernel and userspace.
Libraried like hwloc will know cluster by cluster_cpus and related
sysfs attributes. PoC of HWLOC support at [2].
Note this patch only handle the ACPI case.
Special consideration is needed for SMT processors, where it is
necessary to move 2 levels up the hierarchy from the leaf nodes
(thus skipping the processor core level).
Note that arm64 / ACPI does not provide any means of identifying
a die level in the topology but that may be unrelate to the cluster
level.
[1] ACPI Specification 6.3 - section 5.2.29.1 processor hierarchy node
structure (Type 0)
[2] https://github.com/hisilicon/hwloc/tree/linux-cluster
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Tian Tao <tiantao6@hisilicon.com>
Signed-off-by: Barry Song <song.bao.hua@hisilicon.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210924085104.44806-2-21cnbao@gmail.com
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Andrew Halaney
|
5879f1c94d |
Documentation: dyndbg: Improve cli param examples
Jim pointed out that using $module.dyndbg= is always a more flexible choice for using dynamic debug on the command line. The $module.dyndbg style is checked at boot and handles if $module is a builtin. If it is actually a loadable module, it is handled again later when the module is loaded. If you just use dyndbg="module $module +p" dynamic debug is only enabled when $module is a builtin. It was recommended to illustrate wildcard usage as well. Suggested-by: Jim Cromie <jim.cromie@gmail.com> Signed-off-by: Andrew Halaney <ahalaney@redhat.com> Signed-off-by: Jason Baron <jbaron@akamai.com> Link: https://lore.kernel.org/r/1634139622-20667-4-git-send-email-jbaron@akamai.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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Andrew Halaney
|
9c40e1aa84 |
dyndbg: Remove support for ddebug_query param
This param has been deprecated for a very long time now, let's rip it out. Signed-off-by: Andrew Halaney <ahalaney@redhat.com> Signed-off-by: Jason Baron <jbaron@akamai.com> Link: https://lore.kernel.org/r/1634139622-20667-3-git-send-email-jbaron@akamai.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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|
Linus Torvalds
|
459ea72c6c |
Merge branch 'for-5.15-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
Pull cgroup fixes from Tejun Heo: "All documentation / comment updates" * 'for-5.15-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup: cgroupv2, docs: fix misinformation in "device controller" section cgroup/cpuset: Change references of cpuset_mutex to cpuset_rwsem docs/cgroup: remove some duplicate words |
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Marc Zyngier
|
cd67e9af77 |
Merge branch kvm-arm64/pkvm/restrict-hypercalls into kvmarm-master/next
* kvm-arm64/pkvm/restrict-hypercalls: : . : Restrict the use of some hypercalls as well as kexec once : the protected KVM mode has been initialised. : . Documentation: admin-guide: Document side effects when pKVM is enabled Signed-off-by: Marc Zyngier <maz@kernel.org> |
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Alexandru Elisei
|
53e8ce137f |
Documentation: admin-guide: Document side effects when pKVM is enabled
Recent changes to KVM for arm64 has made it impossible for the host to hibernate or use kexec when protected mode is enabled via the kernel command line. There are people who rely on kexec (for example, developers who use kexec as a quick way to test a new kernel), let's document this change in behaviour, so it doesn't catch them by surprise and we have a place to point people to if it does. Signed-off-by: Alexandru Elisei <alexandru.elisei@arm.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20211011153835.291147-1-alexandru.elisei@arm.com |
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|
Marc Zyngier
|
b6a68b97af |
KVM: arm64: Allow KVM to be disabled from the command line
Although KVM can be compiled out of the kernel, it cannot be disabled at runtime. Allow this possibility by introducing a new mode that will prevent KVM from initialising. This is useful in the (limited) circumstances where you don't want KVM to be available (what is wrong with you?), or when you want to install another hypervisor instead (good luck with that). Reviewed-by: David Brazdil <dbrazdil@google.com> Acked-by: Will Deacon <will@kernel.org> Acked-by: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Reviewed-by: Andrew Scull <ascull@google.com> Link: https://lore.kernel.org/r/20211001170553.3062988-1-maz@kernel.org |
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|
Linus Torvalds
|
3946b46cab |
xen: branch for v5.15-rc5
-----BEGIN PGP SIGNATURE----- iHUEABYIAB0WIQRTLbB6QfY48x44uB6AXGG7T9hjvgUCYWBSIwAKCRCAXGG7T9hj vrXxAP9na1EqRJ+SpWyvxHY1jMaIrbg1bgnOc+GsnWxU5liW5AEA4h1HjHtVtrzL 3vweIS6u2fanrWlYML/daQ3r6EuLPQc= =iXsP -----END PGP SIGNATURE----- Merge tag 'for-linus-5.15b-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip Pull xen fixes from Juergen Gross: - fix two minor issues in the Xen privcmd driver plus a cleanup patch for that driver - fix multiple issues related to running as PVH guest and some related earlyprintk fixes for other Xen guest types - fix an issue introduced in 5.15 the Xen balloon driver * tag 'for-linus-5.15b-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip: xen/balloon: fix cancelled balloon action xen/x86: adjust data placement x86/PVH: adjust function/data placement xen/x86: hook up xen_banner() also for PVH xen/x86: generalize preferred console model from PV to PVH Dom0 xen/x86: make "earlyprintk=xen" work for HVM/PVH DomU xen/x86: allow "earlyprintk=xen" to work for PV Dom0 xen/x86: make "earlyprintk=xen" work better for PVH Dom0 xen/x86: allow PVH Dom0 without XEN_PV=y xen/x86: prevent PVH type from getting clobbered xen/privcmd: drop "pages" parameter from xen_remap_pfn() xen/privcmd: fix error handling in mmap-resource processing xen/privcmd: replace kcalloc() by kvcalloc() when allocating empty pages |
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|
Sakari Ailus
|
566778bc1d |
media: admin-guide: Update i2c-cardlist
Add MIPI CCS compliant devices, a few Sony IMX, Hynix Hi-846 and Omnivision ov13b10 sensors and the DW9768 lens driver to the list of supported devices. Also drop SMIA since as a standard it is obsolete. Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> |
||
|
Martin Kepplinger
|
5fe23d700d |
media: Documentation: i2c-cardlist: add the Hynix hi846 sensor
Add the SK Hynix Hi-846 8M Pixel CMOS image sensor to the i2c-cardlist. Signed-off-by: Martin Kepplinger <martin.kepplinger@puri.sm> Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> |
||
|
Huaixin Chang
|
d73df887b6 |
sched/fair: Add document for burstable CFS bandwidth
Basic description of usage and effect for CFS Bandwidth Control Burst. Co-developed-by: Shanpei Chen <shanpeic@linux.alibaba.com> Signed-off-by: Shanpei Chen <shanpeic@linux.alibaba.com> Co-developed-by: Tianchen Ding <dtcccc@linux.alibaba.com> Signed-off-by: Tianchen Ding <dtcccc@linux.alibaba.com> Signed-off-by: Huaixin Chang <changhuaixin@linux.alibaba.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Daniel Jordan <daniel.m.jordan@oracle.com> Acked-by: Tejun Heo <tj@kernel.org> Link: https://lore.kernel.org/r/20210830032215.16302-3-changhuaixin@linux.alibaba.com |
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|
Jan Beulich
|
42bc9716bc |
xen/x86: make "earlyprintk=xen" work for HVM/PVH DomU
xenboot_write_console() is dealing with these quite fine so I don't see why xenboot_console_setup() would return -ENOENT in this case. Adjust documentation accordingly. Signed-off-by: Jan Beulich <jbeulich@suse.com> Reviewed-by: Juergen Gross <jgross@suse.com> Link: https://lore.kernel.org/r/3d212583-700e-8b2d-727a-845ef33ac265@suse.com Signed-off-by: Juergen Gross <jgross@suse.com> |
||
|
Jonathan Corbet
|
b718f9d919 |
Linux 5.15-rc4
-----BEGIN PGP SIGNATURE----- iQFSBAABCAA8FiEEq68RxlopcLEwq+PEeb4+QwBBGIYFAmFaG98eHHRvcnZhbGRz QGxpbnV4LWZvdW5kYXRpb24ub3JnAAoJEHm+PkMAQRiGosAH/jqy5B2BIEE39O+8 QTr3vO54SyRRuY/d98wZ+O4SPjfqfpCHuyjKt9YJpEdmzH754NC9gSPOOBegnvHI DfrWaivmJ5mdjN2h7+JVqjs58krUv98wWNa5xfvqUp5H7wF3WQg3AxsaMKS1PePD kFHfeFbxsg2gYhyhPK6gHtwLn6dEsx9bGny2bKvCh6KuJQEiUXoEcgnFzjFgLNxp T5zI1cNSCNUzwRIe+vqQRlfVR2JlSI4tiy0zNJWy9dQ5Z4HOSbFcEz5Df2N7qNYn /MqruaASmyREgo9yLHpR1BSyzrea8MCckY04ycYqKZb7gDwcrpAe4QVw2I/Fuzu9 q//PV4I= =+mYg -----END PGP SIGNATURE----- Merge tag 'v5.15-rc4' into docs-next This is needed to get a docs fix that entered via the DRM tree; testers have requested it so that PDF builds in docs-next work again. |
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Andrea Arcangeli
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d9bbdbf324 |
x86: deduplicate the spectre_v2_user documentation
This would need updating to make prctl be the new default, but it's simpler to delete it and refer to the dup. Signed-off-by: Andrea Arcangeli <aarcange@redhat.com> Signed-off-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/r/20201105001406.13005-2-aarcange@redhat.com |
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Andrea Arcangeli
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2f46993d83 |
x86: change default to spec_store_bypass_disable=prctl spectre_v2_user=prctl
Switch the kernel default of SSBD and STIBP to the ones with CONFIG_SECCOMP=n (i.e. spec_store_bypass_disable=prctl spectre_v2_user=prctl) even if CONFIG_SECCOMP=y. Several motivations listed below: - If SMT is enabled the seccomp jail can still attack the rest of the system even with spectre_v2_user=seccomp by using MDS-HT (except on XEON PHI where MDS can be tamed with SMT left enabled, but that's a special case). Setting STIBP become a very expensive window dressing after MDS-HT was discovered. - The seccomp jail cannot attack the kernel with spectre-v2-HT regardless (even if STIBP is not set), but with MDS-HT the seccomp jail can attack the kernel too. - With spec_store_bypass_disable=prctl the seccomp jail can attack the other userland (guest or host mode) using spectre-v2-HT, but the userland attack is already mitigated by both ASLR and pid namespaces for host userland and through virt isolation with libkrun or kata. (if something if somebody is worried about spectre-v2-HT it's best to mount proc with hidepid=2,gid=proc on workstations where not all apps may run under container runtimes, rather than slowing down all seccomp jails, but the best is to add pid namespaces to the seccomp jail). As opposed MDS-HT is not mitigated and the seccomp jail can still attack all other host and guest userland if SMT is enabled even with spec_store_bypass_disable=seccomp. - If full security is required then MDS-HT must also be mitigated with nosmt and then spectre_v2_user=prctl and spectre_v2_user=seccomp would become identical. - Setting spectre_v2_user=seccomp is overall lower priority than to setting javascript.options.wasm false in about:config to protect against remote wasm MDS-HT, instead of worrying about Spectre-v2-HT and STIBP which again is already statistically well mitigated by other means in userland and it's fully mitigated in kernel with retpolines (unlike the wasm assist call with MDS-HT). - SSBD is needed to prevent reading the JIT memory and the primary user being the OpenJDK. However the primary user of SSBD wouldn't be covered by spec_store_bypass_disable=seccomp because it doesn't use seccomp and the primary user also explicitly declined to set PR_SET_SPECULATION_CTRL+PR_SPEC_STORE_BYPASS despite it easily could. In fact it would need to set it only when the sandboxing mechanism is enabled for javaws applets, but it still declined it by declaring security within the same user address space as an untenable objective for their JIT, even in the sandboxing case where performance would be a lesser concern (for the record: I kind of disagree in not setting PR_SPEC_STORE_BYPASS in the sandbox case and I prefer to run javaws through a wrapper that sets PR_SPEC_STORE_BYPASS if I need). In turn it can be inferred that even if the primary user of SSBD would use seccomp, they would invoke it with SECCOMP_FILTER_FLAG_SPEC_ALLOW by now. - runc/crun already set SECCOMP_FILTER_FLAG_SPEC_ALLOW by default, k8s and podman have a default json seccomp allowlist that cannot be slowed down, so for the #1 seccomp user this change is already a noop. - systemd/sshd or other apps that use seccomp, if they really need STIBP or SSBD, they need to explicitly set the PR_SET_SPECULATION_CTRL by now. The stibp/ssbd seccomp blind catch-all approach was done probably initially with a wishful thinking objective to pretend to have a peace of mind that it could magically fix it all. That was wishful thinking before MDS-HT was discovered, but after MDS-HT has been discovered it become just window dressing. - For qemu "-sandbox" seccomp jail it wouldn't make sense to set STIBP or SSBD. SSBD doesn't help with KVM because there's no JIT (if it's needed with TCG it should be an opt-in with PR_SET_SPECULATION_CTRL+PR_SPEC_STORE_BYPASS and it shouldn't slowdown KVM for nothing). For qemu+KVM STIBP would be even more window dressing than it is for all other apps, because in the qemu+KVM case there's not only the MDS attack to worry about with SMT enabled. Even after disabling SMT, there's still a theoretical spectre-v2 attack possible within the same thread context from guest mode to host ring3 that the host kernel retpoline mitigation has no theoretical chance to mitigate. On some kernels a ibrs-always/ibrs-retpoline opt-in model is provided that will enabled IBRS in the qemu host ring3 userland which fixes this theoretical concern. Only after enabling IBRS in the host userland it would then make sense to proceed and worry about STIBP and an attack on the other host userland, but then again SMT would need to be disabled for full security anyway, so that would render STIBP again a noop. - last but not the least: the lack of "spec_store_bypass_disable=prctl spectre_v2_user=prctl" means the moment a guest boots and sshd/systemd runs, the guest kernel will write to SPEC_CTRL MSR which will make the guest vmexit forever slower, forcing KVM to issue a very slow rdmsr instruction at every vmexit. So the end result is that SPEC_CTRL MSR is only available in GCE. Most other public cloud providers don't expose SPEC_CTRL, which means that not only STIBP/SSBD isn't available, but IBPB isn't available either (which would cause no overhead to the guest or the hypervisor because it's write only and requires no reading during vmexit). So the current default already net loss in security (missing IBPB) which means most public cloud providers cannot achieve a fully secure guest with nosmt (and nosmt is enough to fully mitigate MDS-HT). It also means GCE and is unfairly penalized in performance because it provides the option to enable full security in the guest as an opt-in (i.e. nosmt and IBPB). So this change will allow all cloud providers to expose SPEC_CTRL without incurring into any hypervisor slowdown and at the same time it will remove the unfair penalization of GCE performance for doing the right thing and it'll allow to get full security with nosmt with IBPB being available (and STIBP becoming meaningless). Example to put things in prospective: the STIBP enabled in seccomp has never been about protecting apps using seccomp like sshd from an attack from a malicious userland, but to the contrary it has always been about protecting the system from an attack from sshd, after a successful remote network exploit against sshd. In fact initially it wasn't obvious STIBP would work both ways (STIBP was about preventing the task that runs with STIBP to be attacked with spectre-v2-HT, but accidentally in the STIBP case it also prevents the attack in the other direction). In the hypothetical case that sshd has been remotely exploited the last concern should be STIBP being set, because it'll be still possible to obtain info even from the kernel by using MDS if nosmt wasn't set (and if it was set, STIBP is a noop in the first place). As opposed kernel cannot leak anything with spectre-v2 HT because of retpolines and the userland is mitigated by ASLR already and ideally PID namespaces too. If something it'd be worth checking if sshd run the seccomp thread under pid namespaces too if available in the running kernel. SSBD also would be a noop for sshd, since sshd uses no JIT. If sshd prefers to keep doing the STIBP window dressing exercise, it still can even after this change of defaults by opting-in with PR_SPEC_INDIRECT_BRANCH. Ultimately setting SSBD and STIBP by default for all seccomp jails is a bad sweet spot and bad default with more cons than pros that end up reducing security in the public cloud (by giving an huge incentive to not expose SPEC_CTRL which would be needed to get full security with IBPB after setting nosmt in the guest) and by excessively hurting performance to more secure apps using seccomp that end up having to opt out with SECCOMP_FILTER_FLAG_SPEC_ALLOW. The following is the verified result of the new default with SMT enabled: (gdb) print spectre_v2_user_stibp $1 = SPECTRE_V2_USER_PRCTL (gdb) print spectre_v2_user_ibpb $2 = SPECTRE_V2_USER_PRCTL (gdb) print ssb_mode $3 = SPEC_STORE_BYPASS_PRCTL Signed-off-by: Andrea Arcangeli <aarcange@redhat.com> Signed-off-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/r/20201104235054.5678-1-aarcange@redhat.com Acked-by: Josh Poimboeuf <jpoimboe@redhat.com> Link: https://lore.kernel.org/lkml/AAA2EF2C-293D-4D5B-BFA6-FF655105CD84@redhat.com Acked-by: Waiman Long <longman@redhat.com> Link: https://lore.kernel.org/lkml/c0722838-06f7-da6b-138f-e0f26362f16a@redhat.com |
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Pedro Terra
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9b4a9b31b9 |
media: vimc: Enable set resolution at the scaler src pad
Modify the scaler subdevice to accept setting the resolution of the source pad (previously the source resolution would always be 3 times the sink for both dimensions). Now any resolution can be set at src (even smaller ones) and the sink video will be scaled to match it. Test example: With the vimc module up (using the default vimc topology) media-ctl -d platform:vimc -V '"Sensor A":0[fmt:SBGGR8_1X8/640x480]' media-ctl -d platform:vimc -V '"Debayer A":0[fmt:SBGGR8_1X8/640x480]' media-ctl -d platform:vimc -V '"Scaler":0[fmt:RGB888_1X24/640x480]' media-ctl -d platform:vimc -V '"Scaler":0[crop:(100,50)/400x150]' media-ctl -d platform:vimc -V '"Scaler":1[fmt:RGB888_1X24/300x700]' v4l2-ctl -z platform:vimc -d "RGB/YUV Capture" -v width=300,height=700 v4l2-ctl -z platform:vimc -d "Raw Capture 0" -v pixelformat=BA81 v4l2-ctl --stream-mmap --stream-count=10 -z platform:vimc -d "RGB/YUV Capture" \ --stream-to=test.raw The result will be a cropped stream that can be checked with the command ffplay -loglevel warning -v info -f rawvideo -pixel_format rgb24 \ -video_size "300x700" test.raw Co-developed-by: Gabriela Bittencourt <gabrielabittencourt00@gmail.com> Signed-off-by: Gabriela Bittencourt <gabrielabittencourt00@gmail.com> Co-developed-by: Gabriel Francisco Mandaji <gfmandaji@gmail.com> Signed-off-by: Gabriel Francisco Mandaji <gfmandaji@gmail.com> Signed-off-by: Pedro Terra <pedro@terraco.de> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> |
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Fabio Estevam
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1e6494daaf |
media: imx7.rst: Provide an example for imx6ull-evk capture
imx6ull-evk has a parallel OV5640 sensor. Provide an example for imx6ull-evk capture to improve the document. Signed-off-by: Fabio Estevam <festevam@denx.de> Acked-by: Rui Miguel Silva <rmfrfs@gmail.com> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> |
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Nícolas F. R. A. Prado
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75821f8107 |
media: ipu3.rst: Improve header formatting on tables
Use the header-rows option of the flat-table directive in order to have the first row displayed as a header. Also capitalize these headers. These changes make the tables easier to read. Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com> Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> |
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Ezequiel Garcia
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78eee7b5f1 |
media: Rename V4L2_PIX_FMT_HM12 to V4L2_PIX_FMT_NV12_16L16
The V4L2_PIX_FMT_HM12 format is actually a simple NV12 tiled format, with 16x16 linear tiles. Rename the format and move its documentation together with the other tiled NV12 formats. Keep V4L2_PIX_FMT_HM12 for application compatibility. Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> |
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Eugene Syromiatnikov
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61bc346ce6
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uapi/linux/prctl: provide macro definitions for the PR_SCHED_CORE type argument
Commit |
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Tiberiu A Georgescu
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5b32e44e8b |
Documentation: update pagemap with shmem exceptions
Mentioning the current missing information in the pagemap and alternatives on how to retrieve it, in case someone stumbles upon unexpected behaviour. Signed-off-by: Tiberiu A Georgescu <tiberiu.georgescu@nutanix.com> Reviewed-by: Ivan Teterevkov <ivan.teterevkov@nutanix.com> Reviewed-by: Florian Schmidt <florian.schmidt@nutanix.com> Reviewed-by: Carl Waldspurger <carl.waldspurger@nutanix.com> Reviewed-by: Jonathan Davies <jonathan.davies@nutanix.com> Reviewed-by: David Hildenbrand <david@redhat.com> Reviewed-by: Peter Xu <peterx@redhat.com> Link: https://lore.kernel.org/r/20210923064618.157046-2-tiberiu.georgescu@nutanix.com Signed-off-by: Jonathan Corbet <corbet@lwn.net> |
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Chunguang Xu
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4b53bb873f |
docs/cgroup: add entry for misc.events
Added descriptions of misc.events. Signed-off-by: Chunguang Xu <brookxu@tencent.com> Reviewed-by: Michal Koutný <mkoutny@suse.com> Signed-off-by: Tejun Heo <tj@kernel.org> |
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ArthurChiao
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c0002d11d7 |
cgroupv2, docs: fix misinformation in "device controller" section
Hotmail was rejected by the mailing list, switched to gmail to resend. 1. Clarify cgroup BPF program type and attach type; 2. Fix file path broken. Signed-off-by: ArthurChiao <arthurchiao@hotmail.com> Signed-off-by: Tejun Heo <tj@kernel.org> |
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Chunguang Xu
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22b1255792 |
docs/cgroup: remove some duplicate words
When I tried to add some new entries to cgroup-v2.rst, I found that the description of memory.events had some repetitive words, so I tried to delete them. Signed-off-by: Chunguang Xu <brookxu@tencent.com> Signed-off-by: Tejun Heo <tj@kernel.org> |
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Linus Torvalds
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316346243b |
Merge branch 'gcc-min-version-5.1' (make gcc-5.1 the minimum version)
Merge patch series from Nick Desaulniers to update the minimum gcc version to 5.1. This is some of the left-overs from the merge window that I didn't want to deal with yesterday, so it comes in after -rc1 but was sent before. Gcc-4.9 support has been an annoyance for some time, and with -Werror I had the choice of applying a fairly big patch from Kees Cook to remove a fair number of initializer warnings (still leaving some), or this patch series from Nick that just removes the source of the problem. The initializer cleanups might still be worth it regardless, but honestly, I preferred just tackling the problem with gcc-4.9 head-on. We've been more aggressiuve about no longer having to care about compilers that were released a long time ago, and I think it's been a good thing. I added a couple of patches on top to sort out a few left-overs now that we no longer support gcc-4.x. As noted by Arnd, as a result of this minimum compiler version upgrade we can probably change our use of '--std=gnu89' to '--std=gnu11', and finally start using local loop declarations etc. But this series does _not_ yet do that. Link: https://lore.kernel.org/all/20210909182525.372ee687@canb.auug.org.au/ Link: https://lore.kernel.org/lkml/CAK7LNASs6dvU6D3jL2GG3jW58fXfaj6VNOe55NJnTB8UPuk2pA@mail.gmail.com/ Link: https://github.com/ClangBuiltLinux/linux/issues/1438 * emailed patches from Nick Desaulniers <ndesaulniers@google.com>: Drop some straggling mentions of gcc-4.9 as being stale compiler_attributes.h: drop __has_attribute() support for gcc4 vmlinux.lds.h: remove old check for GCC 4.9 compiler-gcc.h: drop checks for older GCC versions Makefile: drop GCC < 5 -fno-var-tracking-assignments workaround arm64: remove GCC version check for ARCH_SUPPORTS_INT128 powerpc: remove GCC version check for UPD_CONSTR riscv: remove Kconfig check for GCC version for ARCH_RV64I Kconfig.debug: drop GCC 5+ version check for DWARF5 mm/ksm: remove old GCC 4.9+ check compiler.h: drop fallback overflow checkers Documentation: raise minimum supported version of GCC to 5.1 |
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Linus Torvalds
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df26327ea0 |
Drop some straggling mentions of gcc-4.9 as being stale
Fix up the admin-guide README file to the new gcc-5.1 requirement, and remove a stale comment about gcc support for the __assume_aligned__ attribute. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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Linus Torvalds
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43175623dd |
More tracing updates for 5.15:
- Add migrate-disable counter to tracing header - Fix error handling in event probes - Fix missed unlock in osnoise in error path - Fix merge issue with tools/bootconfig - Clean up bootconfig data when init memory is removed - Fix bootconfig to loop only on subkeys - Have kernel command lines override bootconfig options - Increase field counts for synthetic events - Have histograms dynamic allocate event elements to save space - Fixes in testing and documentation -----BEGIN PGP SIGNATURE----- iIoEABYIADIWIQRRSw7ePDh/lE+zeZMp5XQQmuv6qgUCYToFZBQccm9zdGVkdEBn b29kbWlzLm9yZwAKCRAp5XQQmuv6qtg5AP44U3Dn1m1lQo3y1DJ9kUP3HsAsDofS Cv7ZM9tLV2p4MQEA9KJc3/B/5BZEK1kso3uLeLT+WxJOC4YStXY19WwmjAI= =Wuo+ -----END PGP SIGNATURE----- Merge tag 'trace-v5.15-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace Pull more tracing updates from Steven Rostedt: - Add migrate-disable counter to tracing header - Fix error handling in event probes - Fix missed unlock in osnoise in error path - Fix merge issue with tools/bootconfig - Clean up bootconfig data when init memory is removed - Fix bootconfig to loop only on subkeys - Have kernel command lines override bootconfig options - Increase field counts for synthetic events - Have histograms dynamic allocate event elements to save space - Fixes in testing and documentation * tag 'trace-v5.15-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: tracing/boot: Fix to loop on only subkeys selftests/ftrace: Exclude "(fault)" in testing add/remove eprobe events tracing: Dynamically allocate the per-elt hist_elt_data array tracing: synth events: increase max fields count tools/bootconfig: Show whole test command for each test case bootconfig: Fix missing return check of xbc_node_compose_key function tools/bootconfig: Fix tracing_on option checking in ftrace2bconf.sh docs: bootconfig: Add how to use bootconfig for kernel parameters init/bootconfig: Reorder init parameter from bootconfig and cmdline init: bootconfig: Remove all bootconfig data when the init memory is removed tracing/osnoise: Fix missed cpus_read_unlock() in start_per_cpu_kthreads() tracing: Fix some alloc_event_probe() error handling bugs tracing: Add migrate-disabled counter to tracing output. |
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Linus Torvalds
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0aa2516017 |
dmaengine updates for v5.15-rc1
New drivers/devices - Support for Renesas RZ/G2L dma controller - New driver for AMD PTDMA controller Updates: - Big pile of idxd updates - Updates for Altera driver, stm32-dma, dw etc Also contains, bus_remove_return_void-5.15 to resolve dependencies -----BEGIN PGP SIGNATURE----- iQIzBAABCAAdFiEE+vs47OPLdNbVcHzyfBQHDyUjg0cFAmE4PBwACgkQfBQHDyUj g0euABAArP/f4o6yxtlPj5hwk2ZLw4QRTZEFevn0qULuwHazxGSKVhJEZVz2asYM S6I6jSvfKYwdO8/s3EVV0jkz4Uxdl4JUzakeMbEsISNF+hacgIhTxuXkgQkvAre9 N3/WQgHLRShe+P3mbX/uN4JyXSMQoWCPUy3yk5xxQvuyBy9zgiW8c5rMiwDNsG3c wF+kX8520Py1QlcK+q5wF+giklAcraPV+buAvJysOukQwxMQjSd2SIMG63Xa+cNx ssvj39au9VInfKYyVioWIUdNQcTRa8+3Ctv6eI44F77x9LfvjBsOLT/dy+BbOCCQ 7zHAlrBJ6UhpGi7WHk+Tnb4RispjdWNAdEvqWU/EHZNk2II/Lb8IJjDnu3wSuXKy AU1uiQ8b6uEY5rKj1lc7XxKw0xGArJEUt7r24z6KNQ7kiYOD4z7G759syGC5atml q5m0rY8I7zI7OGhPJIpaAOh+urdWLsdVvgywRoHrKS0NiUXVAAkfbmvHgm5WboLu INDbm/HWdqvxo2LqnBj/+NSArhvFfrQyUt/po6lYkPddbG0xARAWsjqra+X8XTvR n4P/qlydzCl9QkJGnfM6JrsKGikegNnFvXMUR9kO6Go6IGM9Ea8JD4K6GYk84+yy jrSFJCQsS54I97UIRAGrpGW6qVQUYsFiPUtSM2cCuBOwTG03Wz4= =RYbR -----END PGP SIGNATURE----- Merge tag 'dmaengine-5.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine Pull dmaengine updates from Vinod Koul: "New drivers/devices - Support for Renesas RZ/G2L dma controller - New driver for AMD PTDMA controller Updates: - Big pile of idxd updates - Updates for Altera driver, stm32-dma, dw etc" * tag 'dmaengine-5.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine: (83 commits) dmaengine: sh: fix some NULL dereferences dmaengine: sh: Fix unused initialization of pointer lmdesc MAINTAINERS: Fix AMD PTDMA DRIVER entry dmaengine: ptdma: remove PT_OFFSET to avoid redefnition dmaengine: ptdma: Add debugfs entries for PTDMA dmaengine: ptdma: register PTDMA controller as a DMA resource dmaengine: ptdma: Initial driver for the AMD PTDMA dmaengine: fsl-dpaa2-qdma: Fix spelling mistake "faile" -> "failed" dmaengine: idxd: remove interrupt disable for dev_lock dmaengine: idxd: remove interrupt disable for cmd_lock dmaengine: idxd: fix setting up priv mode for dwq dmaengine: xilinx_dma: Set DMA mask for coherent APIs dmaengine: ti: k3-psil-j721e: Add entry for CSI2RX dmaengine: sh: Add DMAC driver for RZ/G2L SoC dmaengine: Extend the dma_slave_width for 128 bytes dt-bindings: dma: Document RZ/G2L bindings dmaengine: ioat: depends on !UML dmaengine: idxd: set descriptor allocation size to threshold for swq dmaengine: idxd: make submit failure path consistent on desc freeing dmaengine: idxd: remove interrupt flag for completion list spinlock ... |
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Linus Torvalds
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9c566611ac |
More ACPI updates for 5.15-rc1
- Add ACPI support to the PCI VMD driver (Rafael Wysocki).
- Rearrange suspend-to-idle support code to reflect the platform
firmware expectations on some AMD platforms (Mario Limonciello).
- Make SSDT overlays documentation follow the code documented by it
more closely (Andy Shevchenko).
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Merge tag 'acpi-5.15-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull more ACPI updates from Rafael Wysocki:
"These add ACPI support to the PCI VMD driver, improve suspend-to-idle
support for AMD platforms and update documentation.
Specifics:
- Add ACPI support to the PCI VMD driver (Rafael Wysocki)
- Rearrange suspend-to-idle support code to reflect the platform
firmware expectations on some AMD platforms (Mario Limonciello)
- Make SSDT overlays documentation follow the code documented by it
more closely (Andy Shevchenko)"
* tag 'acpi-5.15-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
ACPI: PM: s2idle: Run both AMD and Microsoft methods if both are supported
Documentation: ACPI: Align the SSDT overlays file with the code
PCI: VMD: ACPI: Make ACPI companion lookup work for VMD bus
|
||
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Linus Torvalds
|
2d338201d5 |
Merge branch 'akpm' (patches from Andrew)
Merge more updates from Andrew Morton:
"147 patches, based on
|
||
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Masami Hiramatsu
|
26c9c72fd0 |
docs: bootconfig: Add how to use bootconfig for kernel parameters
Add a section to describe how to use the bootconfig for specifying kernel and init parameters. This is an important section because it is the reason why this document is under the admin-guide. Link: https://lkml.kernel.org/r/163077086399.222577.5881779375643977991.stgit@devnote2 Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Cc: Jonathan Corbet <corbet@lwn.net> Cc: linux-doc@vger.kernel.org Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> |
||
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SeongJae Park
|
c4ba6014ae |
Documentation: add documents for DAMON
This commit adds documents for DAMON under `Documentation/admin-guide/mm/damon/` and `Documentation/vm/damon/`. Link: https://lkml.kernel.org/r/20210716081449.22187-11-sj38.park@gmail.com Signed-off-by: SeongJae Park <sjpark@amazon.de> Reviewed-by: Fernand Sieber <sieberf@amazon.com> Reviewed-by: Markus Boehme <markubo@amazon.de> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Amit Shah <amit@kernel.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Brendan Higgins <brendanhiggins@google.com> Cc: David Hildenbrand <david@redhat.com> Cc: David Rientjes <rientjes@google.com> Cc: David Woodhouse <dwmw@amazon.com> Cc: Fan Du <fan.du@intel.com> Cc: Greg Kroah-Hartman <greg@kroah.com> Cc: Greg Thelen <gthelen@google.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Joe Perches <joe@perches.com> Cc: Jonathan Cameron <Jonathan.Cameron@huawei.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Leonard Foerster <foersleo@amazon.de> Cc: Marco Elver <elver@google.com> Cc: Maximilian Heyne <mheyne@amazon.de> Cc: Mel Gorman <mgorman@suse.de> Cc: Minchan Kim <minchan@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rik van Riel <riel@surriel.com> Cc: Shakeel Butt <shakeelb@google.com> Cc: Shuah Khan <shuah@kernel.org> Cc: Steven Rostedt (VMware) <rostedt@goodmis.org> Cc: Vladimir Davydov <vdavydov.dev@gmail.com> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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David Hildenbrand
|
ac3332c447 |
memory-hotplug.rst: complete admin-guide overhaul
The memory hot(un)plug documentation is outdated and incomplete. Most of the content dates back to 2007, so it's time for a major overhaul. Let's rewrite, reorganize and update most parts of the documentation. In addition to memory hot(un)plug, also add some details regarding ZONE_MOVABLE, with memory hotunplug being one of its main consumers. Drop the file history, that information can more reliably be had from the git log. The style of the document is also properly fixed that e.g., "restview" renders it cleanly now. In the future, we might add some more details about virt users like virtio-mem, the XEN balloon, the Hyper-V balloon and ppc64 dlpar. Link: https://lkml.kernel.org/r/20210707073205.3835-3-david@redhat.com Signed-off-by: David Hildenbrand <david@redhat.com> Acked-by: Michal Hocko <mhocko@suse.com> Reviewed-by: Mike Rapoport <rppt@linux.ibm.com> Reviewed-by: Oscar Salvador <osalvador@suse.de> Cc: Mike Kravetz <mike.kravetz@oracle.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Anshuman Khandual <anshuman.khandual@arm.com> Cc: Muchun Song <songmuchun@bytedance.com> Cc: Pavel Tatashin <pasha.tatashin@soleen.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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David Hildenbrand
|
df82bf5a9f |
memory-hotplug.rst: remove locking details from admin-guide
Patch series "memory-hotplug.rst: complete admin-guide overhaul", v3. This patch (of 2): We have the same content at Documentation/core-api/memory-hotplug.rst and it doesn't fit into the admin-guide. The documentation was accidentially duplicated when merging. Link: https://lkml.kernel.org/r/20210707073205.3835-1-david@redhat.com Link: https://lkml.kernel.org/r/20210707073205.3835-2-david@redhat.com Signed-off-by: David Hildenbrand <david@redhat.com> Acked-by: Mike Rapoport <rppt@linux.ibm.com> Acked-by: Michal Hocko <mhocko@suse.com> Reviewed-by: Oscar Salvador <osalvador@suse.de> Cc: Mike Kravetz <mike.kravetz@oracle.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Anshuman Khandual <anshuman.khandual@arm.com> Cc: Muchun Song <songmuchun@bytedance.com> Cc: Pavel Tatashin <pasha.tatashin@soleen.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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Linus Torvalds
|
69a5c49a91 |
IOMMU Updates for Linux v5.15
Including:
- New DART IOMMU driver for Apple Silicon M1 chips.
- Optimizations for iommu_[map/unmap] performance
- Selective TLB flush support for the AMD IOMMU driver to make
it more efficient on emulated IOMMUs.
- Rework IOVA setup and default domain type setting to move more
code out of IOMMU drivers and to support runtime switching
between certain types of default domains.
- VT-d Updates from Lu Baolu:
- Update the virtual command related registers
- Enable Intel IOMMU scalable mode by default
- Preset A/D bits for user space DMA usage
- Allow devices to have more than 32 outstanding PRs
- Various cleanups
- ARM SMMU Updates from Will Deacon:
- SMMUv3: Minor optimisation to avoid zeroing struct members on CMD submission
- SMMUv3: Increased use of batched commands to reduce submission latency
- SMMUv3: Refactoring in preparation for ECMDQ support
- SMMUv2: Fix races when probing devices with identical StreamIDs
- SMMUv2: Optimise walk cache flushing for Qualcomm implementations
- SMMUv2: Allow deep sleep states for some Qualcomm SoCs with shared clocks
- Various smaller optimizations, cleanups, and fixes
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Merge tag 'iommu-updates-v5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
Pull iommu updates from Joerg Roedel:
- New DART IOMMU driver for Apple Silicon M1 chips
- Optimizations for iommu_[map/unmap] performance
- Selective TLB flush support for the AMD IOMMU driver to make it more
efficient on emulated IOMMUs
- Rework IOVA setup and default domain type setting to move more code
out of IOMMU drivers and to support runtime switching between certain
types of default domains
- VT-d Updates from Lu Baolu:
- Update the virtual command related registers
- Enable Intel IOMMU scalable mode by default
- Preset A/D bits for user space DMA usage
- Allow devices to have more than 32 outstanding PRs
- Various cleanups
- ARM SMMU Updates from Will Deacon:
SMMUv3:
- Minor optimisation to avoid zeroing struct members on CMD submission
- Increased use of batched commands to reduce submission latency
- Refactoring in preparation for ECMDQ support
SMMUv2:
- Fix races when probing devices with identical StreamIDs
- Optimise walk cache flushing for Qualcomm implementations
- Allow deep sleep states for some Qualcomm SoCs with shared clocks
- Various smaller optimizations, cleanups, and fixes
* tag 'iommu-updates-v5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (85 commits)
iommu/io-pgtable: Abstract iommu_iotlb_gather access
iommu/arm-smmu: Fix missing unlock on error in arm_smmu_device_group()
iommu/vt-d: Add present bit check in pasid entry setup helpers
iommu/vt-d: Use pasid_pte_is_present() helper function
iommu/vt-d: Drop the kernel doc annotation
iommu/vt-d: Allow devices to have more than 32 outstanding PRs
iommu/vt-d: Preset A/D bits for user space DMA usage
iommu/vt-d: Enable Intel IOMMU scalable mode by default
iommu/vt-d: Refactor Kconfig a bit
iommu/vt-d: Remove unnecessary oom message
iommu/vt-d: Update the virtual command related registers
iommu: Allow enabling non-strict mode dynamically
iommu: Merge strictness and domain type configs
iommu: Only log strictness for DMA domains
iommu: Expose DMA domain strictness via sysfs
iommu: Express DMA strictness via the domain type
iommu/vt-d: Prepare for multiple DMA domain types
iommu/arm-smmu: Prepare for multiple DMA domain types
iommu/amd: Prepare for multiple DMA domain types
iommu: Introduce explicit type for non-strict DMA domains
...
|
||
|
Linus Torvalds
|
14726903c8 |
Merge branch 'akpm' (patches from Andrew)
Merge misc updates from Andrew Morton: "173 patches. Subsystems affected by this series: ia64, ocfs2, block, and mm (debug, pagecache, gup, swap, shmem, memcg, selftests, pagemap, mremap, bootmem, sparsemem, vmalloc, kasan, pagealloc, memory-failure, hugetlb, userfaultfd, vmscan, compaction, mempolicy, memblock, oom-kill, migration, ksm, percpu, vmstat, and madvise)" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (173 commits) mm/madvise: add MADV_WILLNEED to process_madvise() mm/vmstat: remove unneeded return value mm/vmstat: simplify the array size calculation mm/vmstat: correct some wrong comments mm/percpu,c: remove obsolete comments of pcpu_chunk_populated() selftests: vm: add COW time test for KSM pages selftests: vm: add KSM merging time test mm: KSM: fix data type selftests: vm: add KSM merging across nodes test selftests: vm: add KSM zero page merging test selftests: vm: add KSM unmerge test selftests: vm: add KSM merge test mm/migrate: correct kernel-doc notation mm: wire up syscall process_mrelease mm: introduce process_mrelease system call memblock: make memblock_find_in_range method private mm/mempolicy.c: use in_task() in mempolicy_slab_node() mm/mempolicy: unify the create() func for bind/interleave/prefer-many policies mm/mempolicy: advertise new MPOL_PREFERRED_MANY mm/hugetlb: add support for mempolicy MPOL_PREFERRED_MANY ... |
||
|
Ben Widawsky
|
a38a59fdfa |
mm/mempolicy: advertise new MPOL_PREFERRED_MANY
Adds a new mode to the existing mempolicy modes, MPOL_PREFERRED_MANY. MPOL_PREFERRED_MANY will be adequately documented in the internal admin-guide with this patch. Eventually, the man pages for mbind(2), get_mempolicy(2), set_mempolicy(2) and numactl(8) will also have text about this mode. Those shall contain the canonical reference. NUMA systems continue to become more prevalent. New technologies like PMEM make finer grain control over memory access patterns increasingly desirable. MPOL_PREFERRED_MANY allows userspace to specify a set of nodes that will be tried first when performing allocations. If those allocations fail, all remaining nodes will be tried. It's a straight forward API which solves many of the presumptive needs of system administrators wanting to optimize workloads on such machines. The mode will work either per VMA, or per thread. [Michal Hocko: refine kernel doc for MPOL_PREFERRED_MANY] Link: https://lore.kernel.org/r/20200630212517.308045-13-ben.widawsky@intel.com Link: https://lkml.kernel.org/r/1627970362-61305-5-git-send-email-feng.tang@intel.com Signed-off-by: Ben Widawsky <ben.widawsky@intel.com> Signed-off-by: Feng Tang <feng.tang@intel.com> Acked-by: Michal Hocko <mhocko@suse.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: David Rientjes <rientjes@google.com> Cc: Huang Ying <ying.huang@intel.com> Cc: Mel Gorman <mgorman@techsingularity.net> Cc: Michal Hocko <mhocko@kernel.org> Cc: Mike Kravetz <mike.kravetz@oracle.com> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
||
|
Charan Teja Reddy
|
65d759c8f9 |
mm: compaction: support triggering of proactive compaction by user
The proactive compaction[1] gets triggered for every 500msec and run compaction on the node for COMPACTION_HPAGE_ORDER (usually order-9) pages based on the value set to sysctl.compaction_proactiveness. Triggering the compaction for every 500msec in search of COMPACTION_HPAGE_ORDER pages is not needed for all applications, especially on the embedded system usecases which may have few MB's of RAM. Enabling the proactive compaction in its state will endup in running almost always on such systems. Other side, proactive compaction can still be very much useful for getting a set of higher order pages in some controllable manner(controlled by using the sysctl.compaction_proactiveness). So, on systems where enabling the proactive compaction always may proove not required, can trigger the same from user space on write to its sysctl interface. As an example, say app launcher decide to launch the memory heavy application which can be launched fast if it gets more higher order pages thus launcher can prepare the system in advance by triggering the proactive compaction from userspace. This triggering of proactive compaction is done on a write to sysctl.compaction_proactiveness by user. [1]https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=facdaa917c4d5a376d09d25865f5a863f906234a [akpm@linux-foundation.org: tweak vm.rst, per Mike] Link: https://lkml.kernel.org/r/1627653207-12317-1-git-send-email-charante@codeaurora.org Signed-off-by: Charan Teja Reddy <charante@codeaurora.org> Acked-by: Vlastimil Babka <vbabka@suse.cz> Acked-by: Rafael Aquini <aquini@redhat.com> Cc: Mike Rapoport <rppt@kernel.org> Cc: Luis Chamberlain <mcgrof@kernel.org> Cc: Kees Cook <keescook@chromium.org> Cc: Iurii Zaikin <yzaikin@google.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Mel Gorman <mgorman@techsingularity.net> Cc: Nitin Gupta <nigupta@nvidia.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Khalid Aziz <khalid.aziz@oracle.com> Cc: David Rientjes <rientjes@google.com> Cc: Vinayak Menon <vinmenon@codeaurora.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
||
|
Linus Torvalds
|
23852bec53 |
RDMA v5.15 merge window Pull Request
- Various cleanup and small features for rtrs
- kmap_local_page() conversions
- Driver updates and fixes for: efa, rxe, mlx5, hfi1, qed, hns
- Cache the IB subnet prefix
- Rework how CRC is calcuated in rxe
- Clean reference counting in iwpm's netlink
- Pull object allocation and lifecycle for user QPs to the uverbs core
code
- Several small hns features and continued general code cleanups
- Fix the scatterlist confusion of orig_nents/nents introduced in an
earlier patch creating the append operation
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma
Pull rdma updates from Jason Gunthorpe:
"This is quite a small cycle, no major series stands out. The HNS and
rxe drivers saw the most activity this cycle, with rxe being broken
for a good chunk of time. The significant deleted line count is due to
a SPDX cleanup series.
Summary:
- Various cleanup and small features for rtrs
- kmap_local_page() conversions
- Driver updates and fixes for: efa, rxe, mlx5, hfi1, qed, hns
- Cache the IB subnet prefix
- Rework how CRC is calcuated in rxe
- Clean reference counting in iwpm's netlink
- Pull object allocation and lifecycle for user QPs to the uverbs
core code
- Several small hns features and continued general code cleanups
- Fix the scatterlist confusion of orig_nents/nents introduced in an
earlier patch creating the append operation"
* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma: (90 commits)
RDMA/mlx5: Relax DCS QP creation checks
RDMA/hns: Delete unnecessary blank lines.
RDMA/hns: Encapsulate the qp db as a function
RDMA/hns: Adjust the order in which irq are requested and enabled
RDMA/hns: Remove RST2RST error prints for hw v1
RDMA/hns: Remove dqpn filling when modify qp from Init to Init
RDMA/hns: Fix QP's resp incomplete assignment
RDMA/hns: Fix query destination qpn
RDMA/hfi1: Convert to SPDX identifier
IB/rdmavt: Convert to SPDX identifier
RDMA/hns: Bugfix for incorrect association between dip_idx and dgid
RDMA/hns: Bugfix for the missing assignment for dip_idx
RDMA/hns: Bugfix for data type of dip_idx
RDMA/hns: Fix incorrect lsn field
RDMA/irdma: Remove the repeated declaration
RDMA/core/sa_query: Retry SA queries
RDMA: Use the sg_table directly and remove the opencoded version from umem
lib/scatterlist: Fix wrong update of orig_nents
lib/scatterlist: Provide a dedicated function to support table append
RDMA/hns: Delete unused hns bitmap interface
...
|
||
|
Linus Torvalds
|
7ba88a2a09 |
platform-drivers-x86 for v5.15-1
Highlights:
- Move all the Intel drivers into their own subdir(s) (mostly Kate's work)
- New meraki-mx100 platform driver
- Asus WMI driver enhancements, including
/sys/firmware/acpi/platform_profile support
- New BIOS SAR driver for Intel M.2 WWAM modems
- Alder Lake support for the Intel PMC driver
- A whole bunch of cleanups + fixes all over the place
The following is an automated git shortlog grouped by driver:
BIOS SAR driver for Intel M.2 Modem:
- BIOS SAR driver for Intel M.2 Modem
ISST:
- use semi-colons instead of commas
- Fix optimization with use of numa
Replace deprecated CPU-hotplug functions.:
- Replace deprecated CPU-hotplug functions.
Update Mario Limonciello's email address in the docs:
- Update Mario Limonciello's email address in the docs
acer-wmi:
- Add Turbo Mode support for Acer PH315-53
add meraki-mx100 platform driver:
- add meraki-mx100 platform driver
asus-nb-wmi:
- Add tablet_mode_sw=lid-flip quirk for the TP200s
- Allow configuring SW_TABLET_MODE method with a module option
asus-wmi:
- Fix "unsigned 'retval' is never less than zero" smatch warning
- Delete impossible condition
- Add support for platform_profile
- Add egpu enable method
- Add dgpu disable method
- Add panel overdrive functionality
dell-smbios:
- Remove unused dmi_system_id table
dell-smbios-wmi:
- Add missing kfree in error-exit from run_smbios_call
- Avoid false-positive memcpy() warning
dell-smo8800:
- Convert to be a platform driver
dual_accel_detect:
- Use the new i2c_acpi_client_count() helper
gigabyte-wmi:
- add support for B450M S2H V2
- add support for X570 GAMING X
hp_accel:
- Convert to be a platform driver
- Remove _INI method call
i2c:
- acpi: Add an i2c_acpi_client_count() helper function
i2c-multi-instantiate:
- Use the new i2c_acpi_client_count() helper
ideapad-laptop:
- Fix Legion 5 Fn lock LED
intel-hid:
- Move to intel sub-directory
intel-rst:
- Move to intel sub-directory
intel-smartconnect:
- Move to intel sub-directory
intel-uncore-frequency:
- Move to intel sub-directory
intel-vbtn:
- Move to intel sub-directory
intel-wmi-sbl-fw-update:
- Move to intel sub-directory
intel-wmi-thunderbolt:
- Move to intel sub-directory
intel_atomisp2:
- Move to intel sub-directory
intel_bxtwc_tmu:
- Move to intel sub-directory
intel_cht_int33fe:
- Use the new i2c_acpi_client_count() helper
intel_chtdc_ti_pwrbtn:
- Move to intel sub-directory
intel_int0002_vgpio:
- Move to intel sub-directory
intel_mrfld_pwrbtn:
- Move to intel sub-directory
intel_oaktrail:
- Move to intel sub-directory
intel_pmc_core:
- Move to intel sub-directory
- Prevent possibile overflow
intel_pmt_telemetry:
- Ignore zero sized entries
intel_punit_ipc:
- Move to intel sub-directory
intel_scu_ipc:
- Fix doc of intel_scu_ipc_dev_command_with_size()
intel_speed_select_if:
- Move to intel sub-directory
intel_telemetry:
- Move to intel sub-directory
intel_turbo_max_3:
- Move to intel sub-directory
lg-laptop:
- Use correct event for keyboard backlight FN-key
- Use correct event for touchpad toggle FN-key
- Support for battery charge limit on newer models
platform/mellanox:
- mlxbf-pmc: fix kernel-doc notation
platform/surface:
- aggregator: Use y instead of objs in Makefile
- surface3_power: Use i2c_acpi_get_i2c_resource() helper
platform/x86/intel:
- pmc/core: Add GBE Package C10 fix for Alder Lake PCH
- pmc/core: Add Alder Lake low power mode support for pmc core
- pmc/core: Add Latency Tolerance Reporting (LTR) support to Alder Lake
- pmc/core: Add Alderlake support to pmc core driver
- int3472: Use y instead of objs in Makefile
- pmt: Use y instead of objs in Makefile
- int33fe: Use y instead of objs in Makefile
- Move Intel PMT drivers to new subfolder
thermal/drivers/intel:
- Move intel_menlow to thermal drivers
think-lmi:
- add debug_cmd
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Merge tag 'platform-drivers-x86-v5.15-1' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86
Pull x86 platform driver updates from Hans de Goede:
"Highlights:
- Move all the Intel drivers into their own subdir(s) (mostly Kate's
work)
- New meraki-mx100 platform driver
- Asus WMI driver enhancements, including support for
/sys/firmware/acpi/platform_profile
- New BIOS SAR driver for Intel M.2 WWAM modems
- Alder Lake support for the Intel PMC driver
- A whole bunch of cleanups + fixes all over the place"
* tag 'platform-drivers-x86-v5.15-1' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86: (65 commits)
platform/x86: dell-smbios-wmi: Add missing kfree in error-exit from run_smbios_call
platform/x86: dell-smbios-wmi: Avoid false-positive memcpy() warning
platform/x86: ISST: use semi-colons instead of commas
platform/x86: asus-wmi: Fix "unsigned 'retval' is never less than zero" smatch warning
platform/x86: asus-wmi: Delete impossible condition
platform/x86: hp_accel: Convert to be a platform driver
platform/x86: hp_accel: Remove _INI method call
platform/mellanox: mlxbf-pmc: fix kernel-doc notation
platform/x86/intel: pmc/core: Add GBE Package C10 fix for Alder Lake PCH
platform/x86/intel: pmc/core: Add Alder Lake low power mode support for pmc core
platform/x86/intel: pmc/core: Add Latency Tolerance Reporting (LTR) support to Alder Lake
platform/x86/intel: pmc/core: Add Alderlake support to pmc core driver
platform/x86: intel-wmi-thunderbolt: Move to intel sub-directory
platform/x86: intel-wmi-sbl-fw-update: Move to intel sub-directory
platform/x86: intel-vbtn: Move to intel sub-directory
platform/x86: intel_oaktrail: Move to intel sub-directory
platform/x86: intel_int0002_vgpio: Move to intel sub-directory
platform/x86: intel-hid: Move to intel sub-directory
platform/x86: intel_atomisp2: Move to intel sub-directory
platform/x86: intel_speed_select_if: Move to intel sub-directory
...
|
||
|
Andy Shevchenko
|
17b121ad0c |
Documentation: ACPI: Align the SSDT overlays file with the code
This updates the following: 1) The ASL code to follow latest ACPI requirements, i.e. - static buffer to be defined outside of the method - The _ADR and _HID shouldn't be together for the same device 2) EFI section relies on the additional kernel configuration option, i.e. CONFIG_EFI_CUSTOM_SSDT_OVERLAYS 3) Refer to ACPI machine language as AML (capitalized) 4) Miscellaneous amendments Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
||
|
Linus Torvalds
|
4ac6d90867 |
Yet another set of documentation changes:
- A reworking of PDF generation to yield better results for documents
using CJK fonts in particular.
- A new set of translations into traditional Chinese, a dialect for which
I am assured there is a community of interested readers.
- A lot more regular Chinese translation work as well.
...plus the usual assortment of updates, fixes, typo tweaks, etc.
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Merge tag 'docs-5.15' of git://git.lwn.net/linux
Pull documentation updates from Jonathan Corbet:
"Yet another set of documentation changes:
- A reworking of PDF generation to yield better results for documents
using CJK fonts in particular.
- A new set of translations into traditional Chinese, a dialect for
which I am assured there is a community of interested readers.
- A lot more regular Chinese translation work as well.
... plus the usual assortment of updates, fixes, typo tweaks, etc"
* tag 'docs-5.15' of git://git.lwn.net/linux: (55 commits)
docs: sphinx-requirements: Move sphinx_rtd_theme to top
docs: pdfdocs: Enable language-specific font choice of zh_TW translations
docs: pdfdocs: Teach xeCJK about character classes of quotation marks
docs: pdfdocs: Permit AutoFakeSlant for CJK fonts
docs: pdfdocs: One-half spacing for CJK translations
docs: pdfdocs: Add conf.py local to translations for ascii-art alignment
docs: pdfdocs: Preserve inter-phrase space in Korean translations
docs: pdfdocs: Choose Serif font as CJK mainfont if possible
docs: pdfdocs: Add CJK-language-specific font settings
docs: pdfdocs: Refactor config for CJK document
scripts/kernel-doc: Override -Werror from KCFLAGS with KDOC_WERROR
docs/zh_CN: Add zh_CN/accounting/psi.rst
doc: align Italian translation
Documentation/features/vm: riscv supports THP now
docs/zh_CN: add infiniband user_verbs translation
docs/zh_CN: add infiniband user_mad translation
docs/zh_CN: add infiniband tag_matching translation
docs/zh_CN: add infiniband sysfs translation
docs/zh_CN: add infiniband opa_vnic translation
docs/zh_CN: add infiniband ipoib translation
...
|
||
|
Linus Torvalds
|
df43d90382 |
printk changes for 5.15
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||
|
Linus Torvalds
|
57c78a234e |
arm64 updates for 5.15:
- Support for 32-bit tasks on asymmetric AArch32 systems (on top of the scheduler changes merged via the tip tree). - More entry.S clean-ups and conversion to C. - MTE updates: allow a preferred tag checking mode to be set per CPU (the overhead of synchronous mode is smaller for some CPUs than others); optimisations for kernel entry/exit path; optionally disable MTE on the kernel command line. - Kselftest improvements for SVE and signal handling, PtrAuth. - Fix unlikely race where a TLBI could use stale ASID on an ASID roll-over (found by inspection). - Miscellaneous fixes: disable trapping of PMSNEVFR_EL1 to higher exception levels; drop unnecessary sigdelsetmask() call in the signal32 handling; remove BUG_ON when failing to allocate SVE state (just signal the process); SYM_CODE annotations. - Other trivial clean-ups: use macros instead of magic numbers, remove redundant returns, typos. -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEE5RElWfyWxS+3PLO2a9axLQDIXvEFAmEuYkoACgkQa9axLQDI XvEWVw/9HSWbccLrQ68ulaqZkL4r6lL2RqvZ2p6fkIRW7bX1JS4UJjWe3+VBg5Ed DQ1A5cHC5ZndQ4gCRsUhcq7IMXBSj3twMzK7yxBk3zh8tbhVrIOONsKMurMw1NyM OmoyTJ01i2ZrkDs0OU3fBlvIHPxBjKbOZqykOJHjrB2rwBSbsyUw2KvpM7ha8DOf O7gKViDrdAhumdIL9rsMvSiIPoJLCxvqeu55c3saVu1JrUR6ENu7lMu3jt4WrfK3 m5gf76IFbgxXvlLiC8RJW7OYaXZ+COb7RA/yP/lK+Y0ug9PwqTpzXDwqvAp8nBIv y7DK0umcBwfDWmwnRO+ZzNPjOGTHnOnjC07WNBPn3v03pMeJ8v8RnvzHkliek31P r6uFWBxWO/O0sBbSpR+4tzgNfir0RkMajwL5pxQCEMoPCucStYQQl8zIeJeJecpT DKIyKzfFw6O59gdhE6dCj2wXH8YmKUoSUPCAXpKGzK/oYVOGVQTZSZjIC++ydFWv AOXz77etPidk3/Tl15Ena7fkkMkxX9UM8dTjOFS64mSWlEyzE6FtfAgm2rIEOaG7 ps6IjVzVves39SC+yry8T2L6gsxPnanRfwKKCWHkovQzNFgs5Qt51Fd5eIeI1jZ0 uEZhd19FN4136QhjWJOeXL/eyj0bv1WLX/mUln95sHnKyf4je9w= =X6Wm -----END PGP SIGNATURE----- Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux Pull arm64 updates from Catalin Marinas: - Support for 32-bit tasks on asymmetric AArch32 systems (on top of the scheduler changes merged via the tip tree). - More entry.S clean-ups and conversion to C. - MTE updates: allow a preferred tag checking mode to be set per CPU (the overhead of synchronous mode is smaller for some CPUs than others); optimisations for kernel entry/exit path; optionally disable MTE on the kernel command line. - Kselftest improvements for SVE and signal handling, PtrAuth. - Fix unlikely race where a TLBI could use stale ASID on an ASID roll-over (found by inspection). - Miscellaneous fixes: disable trapping of PMSNEVFR_EL1 to higher exception levels; drop unnecessary sigdelsetmask() call in the signal32 handling; remove BUG_ON when failing to allocate SVE state (just signal the process); SYM_CODE annotations. - Other trivial clean-ups: use macros instead of magic numbers, remove redundant returns, typos. * tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (56 commits) arm64: Do not trap PMSNEVFR_EL1 arm64: mm: fix comment typo of pud_offset_phys() arm64: signal32: Drop pointless call to sigdelsetmask() arm64/sve: Better handle failure to allocate SVE register storage arm64: Document the requirement for SCR_EL3.HCE arm64: head: avoid over-mapping in map_memory arm64/sve: Add a comment documenting the binutils needed for SVE asm arm64/sve: Add some comments for sve_save/load_state() kselftest/arm64: signal: Add a TODO list for signal handling tests kselftest/arm64: signal: Add test case for SVE register state in signals kselftest/arm64: signal: Verify that signals can't change the SVE vector length kselftest/arm64: signal: Check SVE signal frame shows expected vector length kselftest/arm64: signal: Support signal frames with SVE register data kselftest/arm64: signal: Add SVE to the set of features we can check for arm64: replace in_irq() with in_hardirq() kselftest/arm64: pac: Fix skipping of tests on systems without PAC Documentation: arm64: describe asymmetric 32-bit support arm64: Remove logic to kill 32-bit tasks on 64-bit-only cores arm64: Hook up cmdline parameter to allow mismatched 32-bit EL0 arm64: Advertise CPUs capable of running 32-bit applications in sysfs ... |
||
|
Linus Torvalds
|
ba1dc7f273 |
Char / Misc driver changes for 5.15-rc1
Here is the big set of char/misc driver changes for 5.15-rc1. Lots of different driver subsystems are being updated in here, notably: - mhi subsystem update - fpga subsystem update - coresight/hwtracing subsystem update - interconnect subsystem update - nvmem subsystem update - parport drivers update - phy subsystem update - soundwire subsystem update and there are some other char/misc drivers being updated as well: - binder driver additions - new misc drivers - lkdtm driver updates - mei driver updates - sram driver updates - other minor driver updates. Note, there are no habanna labs driver updates in this pull request, that will probably come later before -rc1 is out in a different request. All of these have been in linux-next for a while with no reported problems. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> -----BEGIN PGP SIGNATURE----- iG0EABECAC0WIQT0tgzFv3jCIUoxPcsxR9QN2y37KQUCYS+Kyw8cZ3JlZ0Brcm9h aC5jb20ACgkQMUfUDdst+ymlpACg0JM+hSeo8T5GtwZksZ1QXXQfh8sAoK6Dt6xF e62OQuuMFT0Un0qOflZk =emH+ -----END PGP SIGNATURE----- Merge tag 'char-misc-5.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc Pull char / misc driver updates from Greg KH: "Here is the big set of char/misc driver changes for 5.15-rc1. Lots of different driver subsystems are being updated in here, notably: - mhi subsystem update - fpga subsystem update - coresight/hwtracing subsystem update - interconnect subsystem update - nvmem subsystem update - parport drivers update - phy subsystem update - soundwire subsystem update and there are some other char/misc drivers being updated as well: - binder driver additions - new misc drivers - lkdtm driver updates - mei driver updates - sram driver updates - other minor driver updates. Note, there are no habanalabs driver updates in this pull request, that will probably come later before -rc1 is out in a different request. All of these have been in linux-next for a while with no reported problems" * tag 'char-misc-5.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (169 commits) Revert "bus: mhi: Add inbound buffers allocation flag" misc/pvpanic: fix set driver data VMCI: fix NULL pointer dereference when unmapping queue pair char: mware: fix returnvar.cocci warnings parport: remove non-zero check on count soundwire: cadence: do not extend reset delay soundwire: intel: conditionally exit clock stop mode on system suspend soundwire: intel: skip suspend/resume/wake when link was not started soundwire: intel: fix potential race condition during power down phy: qcom-qmp: Add support for SM6115 UFS phy dt-bindings: phy: qcom,qmp: Add SM6115 UFS PHY bindings phy: qmp: Provide unique clock names for DP clocks lkdtm: remove IDE_CORE_CP crashpoint lkdtm: replace SCSI_DISPATCH_CMD with SCSI_QUEUE_RQ coresight: Replace deprecated CPU-hotplug functions. Documentation: coresight: Add documentation for CoreSight config coresight: syscfg: Add initial configfs support coresight: config: Add preloaded configurations coresight: etm4x: Add complex configuration handlers to etmv4 coresight: etm-perf: Update to activate selected configuration ... |
||
|
Linus Torvalds
|
9e9fb7655e |
Core:
- Enable memcg accounting for various networking objects.
BPF:
- Introduce bpf timers.
- Add perf link and opaque bpf_cookie which the program can read
out again, to be used in libbpf-based USDT library.
- Add bpf_task_pt_regs() helper to access user space pt_regs
in kprobes, to help user space stack unwinding.
- Add support for UNIX sockets for BPF sockmap.
- Extend BPF iterator support for UNIX domain sockets.
- Allow BPF TCP congestion control progs and bpf iterators to call
bpf_setsockopt(), e.g. to switch to another congestion control
algorithm.
Protocols:
- Support IOAM Pre-allocated Trace with IPv6.
- Support Management Component Transport Protocol.
- bridge: multicast: add vlan support.
- netfilter: add hooks for the SRv6 lightweight tunnel driver.
- tcp:
- enable mid-stream window clamping (by user space or BPF)
- allow data-less, empty-cookie SYN with TFO_SERVER_COOKIE_NOT_REQD
- more accurate DSACK processing for RACK-TLP
- mptcp:
- add full mesh path manager option
- add partial support for MP_FAIL
- improve use of backup subflows
- optimize option processing
- af_unix: add OOB notification support.
- ipv6: add IFLA_INET6_RA_MTU to expose MTU value advertised by
the router.
- mac80211: Target Wake Time support in AP mode.
- can: j1939: extend UAPI to notify about RX status.
Driver APIs:
- Add page frag support in page pool API.
- Many improvements to the DSA (distributed switch) APIs.
- ethtool: extend IRQ coalesce uAPI with timer reset modes.
- devlink: control which auxiliary devices are created.
- Support CAN PHYs via the generic PHY subsystem.
- Proper cross-chip support for tag_8021q.
- Allow TX forwarding for the software bridge data path to be
offloaded to capable devices.
Drivers:
- veth: more flexible channels number configuration.
- openvswitch: introduce per-cpu upcall dispatch.
- Add internet mix (IMIX) mode to pktgen.
- Transparently handle XDP operations in the bonding driver.
- Add LiteETH network driver.
- Renesas (ravb):
- support Gigabit Ethernet IP
- NXP Ethernet switch (sja1105)
- fast aging support
- support for "H" switch topologies
- traffic termination for ports under VLAN-aware bridge
- Intel 1G Ethernet
- support getcrosststamp() with PCIe PTM (Precision Time
Measurement) for better time sync
- support Credit-Based Shaper (CBS) offload, enabling HW traffic
prioritization and bandwidth reservation
- Broadcom Ethernet (bnxt)
- support pulse-per-second output
- support larger Rx rings
- Mellanox Ethernet (mlx5)
- support ethtool RSS contexts and MQPRIO channel mode
- support LAG offload with bridging
- support devlink rate limit API
- support packet sampling on tunnels
- Huawei Ethernet (hns3):
- basic devlink support
- add extended IRQ coalescing support
- report extended link state
- Netronome Ethernet (nfp):
- add conntrack offload support
- Broadcom WiFi (brcmfmac):
- add WPA3 Personal with FT to supported cipher suites
- support 43752 SDIO device
- Intel WiFi (iwlwifi):
- support scanning hidden 6GHz networks
- support for a new hardware family (Bz)
- Xen pv driver:
- harden netfront against malicious backends
- Qualcomm mobile
- ipa: refactor power management and enable automatic suspend
- mhi: move MBIM to WWAN subsystem interfaces
Refactor:
- Ambient BPF run context and cgroup storage cleanup.
- Compat rework for ndo_ioctl.
Old code removal:
- prism54 remove the obsoleted driver, deprecated by the p54 driver.
- wan: remove sbni/granch driver.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Merge tag 'net-next-5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next
Pull networking updates from Jakub Kicinski:
"Core:
- Enable memcg accounting for various networking objects.
BPF:
- Introduce bpf timers.
- Add perf link and opaque bpf_cookie which the program can read out
again, to be used in libbpf-based USDT library.
- Add bpf_task_pt_regs() helper to access user space pt_regs in
kprobes, to help user space stack unwinding.
- Add support for UNIX sockets for BPF sockmap.
- Extend BPF iterator support for UNIX domain sockets.
- Allow BPF TCP congestion control progs and bpf iterators to call
bpf_setsockopt(), e.g. to switch to another congestion control
algorithm.
Protocols:
- Support IOAM Pre-allocated Trace with IPv6.
- Support Management Component Transport Protocol.
- bridge: multicast: add vlan support.
- netfilter: add hooks for the SRv6 lightweight tunnel driver.
- tcp:
- enable mid-stream window clamping (by user space or BPF)
- allow data-less, empty-cookie SYN with TFO_SERVER_COOKIE_NOT_REQD
- more accurate DSACK processing for RACK-TLP
- mptcp:
- add full mesh path manager option
- add partial support for MP_FAIL
- improve use of backup subflows
- optimize option processing
- af_unix: add OOB notification support.
- ipv6: add IFLA_INET6_RA_MTU to expose MTU value advertised by the
router.
- mac80211: Target Wake Time support in AP mode.
- can: j1939: extend UAPI to notify about RX status.
Driver APIs:
- Add page frag support in page pool API.
- Many improvements to the DSA (distributed switch) APIs.
- ethtool: extend IRQ coalesce uAPI with timer reset modes.
- devlink: control which auxiliary devices are created.
- Support CAN PHYs via the generic PHY subsystem.
- Proper cross-chip support for tag_8021q.
- Allow TX forwarding for the software bridge data path to be
offloaded to capable devices.
Drivers:
- veth: more flexible channels number configuration.
- openvswitch: introduce per-cpu upcall dispatch.
- Add internet mix (IMIX) mode to pktgen.
- Transparently handle XDP operations in the bonding driver.
- Add LiteETH network driver.
- Renesas (ravb):
- support Gigabit Ethernet IP
- NXP Ethernet switch (sja1105):
- fast aging support
- support for "H" switch topologies
- traffic termination for ports under VLAN-aware bridge
- Intel 1G Ethernet
- support getcrosststamp() with PCIe PTM (Precision Time
Measurement) for better time sync
- support Credit-Based Shaper (CBS) offload, enabling HW traffic
prioritization and bandwidth reservation
- Broadcom Ethernet (bnxt)
- support pulse-per-second output
- support larger Rx rings
- Mellanox Ethernet (mlx5)
- support ethtool RSS contexts and MQPRIO channel mode
- support LAG offload with bridging
- support devlink rate limit API
- support packet sampling on tunnels
- Huawei Ethernet (hns3):
- basic devlink support
- add extended IRQ coalescing support
- report extended link state
- Netronome Ethernet (nfp):
- add conntrack offload support
- Broadcom WiFi (brcmfmac):
- add WPA3 Personal with FT to supported cipher suites
- support 43752 SDIO device
- Intel WiFi (iwlwifi):
- support scanning hidden 6GHz networks
- support for a new hardware family (Bz)
- Xen pv driver:
- harden netfront against malicious backends
- Qualcomm mobile
- ipa: refactor power management and enable automatic suspend
- mhi: move MBIM to WWAN subsystem interfaces
Refactor:
- Ambient BPF run context and cgroup storage cleanup.
- Compat rework for ndo_ioctl.
Old code removal:
- prism54 remove the obsoleted driver, deprecated by the p54 driver.
- wan: remove sbni/granch driver"
* tag 'net-next-5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1715 commits)
net: Add depends on OF_NET for LiteX's LiteETH
ipv6: seg6: remove duplicated include
net: hns3: remove unnecessary spaces
net: hns3: add some required spaces
net: hns3: clean up a type mismatch warning
net: hns3: refine function hns3_set_default_feature()
ipv6: remove duplicated 'net/lwtunnel.h' include
net: w5100: check return value after calling platform_get_resource()
net/mlxbf_gige: Make use of devm_platform_ioremap_resourcexxx()
net: mdio: mscc-miim: Make use of the helper function devm_platform_ioremap_resource()
net: mdio-ipq4019: Make use of devm_platform_ioremap_resource()
fou: remove sparse errors
ipv4: fix endianness issue in inet_rtm_getroute_build_skb()
octeontx2-af: Set proper errorcode for IPv4 checksum errors
octeontx2-af: Fix static code analyzer reported issues
octeontx2-af: Fix mailbox errors in nix_rss_flowkey_cfg
octeontx2-af: Fix loop in free and unmap counter
af_unix: fix potential NULL deref in unix_dgram_connect()
dpaa2-eth: Replace strlcpy with strscpy
octeontx2-af: Use NDC TX for transmit packet data
...
|
||
|
Linus Torvalds
|
69dc8010b8 |
Merge branch 'for-5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
Pull cgroup updates from Tejun Heo:
"Two cpuset behavior changes:
- cpuset on cgroup2 is changed to enable memory migration based on
nodemask by default.
- A notification is generated when cpuset partition state changes.
All other patches are minor fixes and cleanups"
* 'for-5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
cgroup: Avoid compiler warnings with no subsystems
cgroup/cpuset: Avoid memory migration when nodemasks match
cgroup/cpuset: Enable memory migration for cpuset v2
cgroup/cpuset: Enable event notification when partition state changes
cgroup: cgroup-v1: clean up kernel-doc notation
cgroup: Replace deprecated CPU-hotplug functions.
cgroup/cpuset: Fix violation of cpuset locking rule
cgroup/cpuset: Fix a partition bug with hotplug
cgroup/cpuset: Miscellaneous code cleanup
cgroup: remove cgroup_mount from comments
|
||
|
Linus Torvalds
|
efa916af13 |
- Add DM infrastructure for IMA-based remote attestion. These changes
are the basis for deploying DM-based storage in a "cloud" that must validate configurations end-users run to maintain trust. These DM changes allow supported DM targets' configurations to be measured via IMA. But the policy and enforcement (of which configurations are valid) is managed by something outside the kernel (e.g. Keylime). - Fix DM crypt scalability regression on systems with many cpus due to percpu_counter spinlock contention in crypt_page_alloc(). - Use in_hardirq() instead of deprecated in_irq() in DM crypt. - Add event counters to DM writecache to allow users to further assess how the writecache is performing. - Various code cleanup in DM writecache's main IO mapping function. -----BEGIN PGP SIGNATURE----- iQEzBAABCAAdFiEEJfWUX4UqZ4x1O2wixSPxCi2dA1oFAmEuWG0ACgkQxSPxCi2d A1rZIgf+JSSR2/DBg4j9w0oVsay+rfFB+tyZLVvHFEraukDbxOKy7Dck1GZybQBq mFTqCWKQHOvME4nf4swIY/klPi3VhPNyWDY/hI/FAFaiTskLqjxhQQc1+cECLkMx ittIKYvWgcg7kflCuN6LiUslTB/P4Lo6GmNqMOhFn3nkN5hg76xaxPK+JCMGLgTM qs+mbZfB1Z51G+cDlU0E5WCn37k/jqqwhb8NN90Zozgi7ByQEO01bd2EkSsYT0T/ ZrDOWP8M8u14QHAV0e8n9e6a/d5atIV5g/+XrDbVDvzwtq7eI+ojBNHDBpcgxiH7 /AVb9AM4Pd87ExWMbsBxr3Hgbc5+dQ== =yIsi -----END PGP SIGNATURE----- Merge tag 'for-5.15/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm Pull device mapper updates from Mike Snitzer: - Add DM infrastructure for IMA-based remote attestion. These changes are the basis for deploying DM-based storage in a "cloud" that must validate configurations end-users run to maintain trust. These DM changes allow supported DM targets' configurations to be measured via IMA. But the policy and enforcement (of which configurations are valid) is managed by something outside the kernel (e.g. Keylime). - Fix DM crypt scalability regression on systems with many cpus due to percpu_counter spinlock contention in crypt_page_alloc(). - Use in_hardirq() instead of deprecated in_irq() in DM crypt. - Add event counters to DM writecache to allow users to further assess how the writecache is performing. - Various code cleanup in DM writecache's main IO mapping function. * tag 'for-5.15/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm: dm crypt: use in_hardirq() instead of deprecated in_irq() dm ima: update dm documentation for ima measurement support dm ima: update dm target attributes for ima measurements dm ima: add a warning in dm_init if duplicate ima events are not measured dm ima: prefix ima event name related to device mapper with dm_ dm ima: add version info to dm related events in ima log dm ima: prefix dm table hashes in ima log with hash algorithm dm crypt: Avoid percpu_counter spinlock contention in crypt_page_alloc() dm: add documentation for IMA measurement support dm: update target status functions to support IMA measurement dm ima: measure data on device rename dm ima: measure data on table clear dm ima: measure data on device remove dm ima: measure data on device resume dm ima: measure data on table load dm writecache: add event counters dm writecache: report invalid return from writecache_map helpers dm writecache: further writecache_map() cleanup dm writecache: factor out writecache_map_remap_origin() dm writecache: split up writecache_map() to improve code readability |
||
|
Catalin Marinas
|
65266a7c6a |
Merge remote-tracking branch 'tip/sched/arm64' into for-next/core
* tip/sched/arm64: (785 commits) Documentation: arm64: describe asymmetric 32-bit support arm64: Remove logic to kill 32-bit tasks on 64-bit-only cores arm64: Hook up cmdline parameter to allow mismatched 32-bit EL0 arm64: Advertise CPUs capable of running 32-bit applications in sysfs arm64: Prevent offlining first CPU with 32-bit EL0 on mismatched system arm64: exec: Adjust affinity for compat tasks with mismatched 32-bit EL0 arm64: Implement task_cpu_possible_mask() sched: Introduce dl_task_check_affinity() to check proposed affinity sched: Allow task CPU affinity to be restricted on asymmetric systems sched: Split the guts of sched_setaffinity() into a helper function sched: Introduce task_struct::user_cpus_ptr to track requested affinity sched: Reject CPU affinity changes based on task_cpu_possible_mask() cpuset: Cleanup cpuset_cpus_allowed_fallback() use in select_fallback_rq() cpuset: Honour task_cpu_possible_mask() in guarantee_online_cpus() cpuset: Don't use the cpu_possible_mask as a last resort for cgroup v1 sched: Introduce task_cpu_possible_mask() to limit fallback rq selection sched: Cgroup SCHED_IDLE support sched/topology: Skip updating masks for non-online nodes Linux 5.14-rc6 lib: use PFN_PHYS() in devmem_is_allowed() ... |
||
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Linus Torvalds
|
bed9166741 |
A set of updates for the 86 reboot code:
- Limit the Dell Optiplex 990 quirk to early BIOS versions to avoid the
full 'power cycle' alike reboot which is required for the buggy BIOSes.
- Update documentation for the reboot=pci command line option and
document how DMI platform quirks can be overridden.
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Merge tag 'x86-misc-2021-08-30' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull misc x86 updates from Thomas Gleixner:
"A set of updates for the x86 reboot code:
- Limit the Dell Optiplex 990 quirk to early BIOS versions to avoid
the full 'power cycle' alike reboot which is required for the buggy
BIOSes.
- Update documentation for the reboot=pci command line option and
document how DMI platform quirks can be overridden"
* tag 'x86-misc-2021-08-30' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/reboot: Limit Dell Optiplex 990 quirk to early BIOS versions
x86/reboot: Document how to override DMI platform quirks
x86/reboot: Document the "reboot=pci" option
|
||
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Petr Mladek
|
baa99c9267 | Merge branch 'for-5.15-verbose-console' into for-linus | ||
|
Tushar Sugandhi
|
17bfa96851 |
dm ima: update dm documentation for ima measurement support
The ima documentation for measuring DM targets (dm-ima.rst) is missing the attribute information for the targets - 'cache', 'integrity', 'multipath', and 'snapshot'. It is also missing the grammar for various DM events and targets, which can help the attestation servers to determine what data to expect for a given DM device. Further, the documentation needs to be updated to incorporate code changes made to DM ima events and targets as part of this patch series. For instance, prefixing the event names with "dm_", adding the DM version to events, prefixing the table hashes in the ima log with the hash algorithm etc. There are warnings reported by 'make htmldocs' on dm-ima.rst, which need to be fixed. And lastly, the expected behavior needs to be documented when the configuration CONFIG_IMA_DISABLE_HTABLE is disabled. Update the documentation to add examples for 'cache', 'integrity', 'multipath', and 'snapshot' targets. Add the grammar for various DM events and targets in Backus Naur form, so that the attestation servers can interpret and act on the ima measurements for DM target. Fix htmldocs warnings in dm-ima.rst. Update the documentation to be consistent with the code changes that are part of this patch series. Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Tushar Sugandhi <tusharsu@linux.microsoft.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com> |
||
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Will Deacon
|
702f438726 |
Documentation: arm64: describe asymmetric 32-bit support
Document support for running 32-bit tasks on asymmetric 32-bit systems and its impact on the user ABI when enabled. Signed-off-by: Will Deacon <will@kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lore.kernel.org/r/20210730112443.23245-17-will@kernel.org |
||
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Will Deacon
|
ead7de462a |
arm64: Hook up cmdline parameter to allow mismatched 32-bit EL0
Allow systems with mismatched 32-bit support at EL0 to run 32-bit applications based on a new kernel parameter. Signed-off-by: Will Deacon <will@kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Link: https://lore.kernel.org/r/20210730112443.23245-15-will@kernel.org |
||
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Matan Ziv-Av
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ae26278829 |
platform/x86: lg-laptop: Use correct event for keyboard backlight FN-key
Use led_classdev_notify_brightness_hw_changed() instead of F16 key. Signed-off-by: Matan Ziv-Av <matan@svgalib.org> Link: https://lore.kernel.org/r/2196990f167efe6a42d51fb85f4db4cdf4d9e80e.1629291912.git.matan@svgalib.org Reviewed-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Hans de Goede <hdegoede@redhat.com> |
||
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Matan Ziv-Av
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85973bf4c1 |
platform/x86: lg-laptop: Use correct event for touchpad toggle FN-key
Send F21 which is the standard for this key, instead of F13. Signed-off-by: Matan Ziv-Av <matan@svgalib.org> Link: https://lore.kernel.org/r/b847895c1f170e2e59df5757a4d603d28149f648.1629291912.git.matan@svgalib.org Reviewed-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Hans de Goede <hdegoede@redhat.com> |
||
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Lu Baolu
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792fb43ce2 |
iommu/vt-d: Enable Intel IOMMU scalable mode by default
The commit
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||
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Robin Murphy
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e96763ec42 |
iommu: Merge strictness and domain type configs
To parallel the sysfs behaviour, merge the new build-time option for DMA domain strictness into the default domain type choice. Suggested-by: Joerg Roedel <joro@8bytes.org> Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com> Reviewed-by: Jean-Philippe Brucker <jean-philippe@linaro.org> Reviewed-by: John Garry <john.garry@huawei.com> Signed-off-by: Robin Murphy <robin.murphy@arm.com> Link: https://lore.kernel.org/r/d04af35b9c0f2a1d39605d7a9b451f5e1f0c7736.1628682049.git.robin.murphy@arm.com Signed-off-by: Joerg Roedel <jroedel@suse.de> |
||
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Waiman Long
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ee9707e859 |
cgroup/cpuset: Enable memory migration for cpuset v2
When a user changes cpuset.cpus, each task in a v2 cpuset will be moved to one of the new cpus if it is not there already. For memory, however, they won't be migrated to the new nodes when cpuset.mems changes. This is an inconsistency in behavior. In cpuset v1, there is a memory_migrate control file to enable such behavior by setting the CS_MEMORY_MIGRATE flag. Make it the default for cpuset v2 so that we have a consistent set of behavior for both cpus and memory. There is certainly a cost to make memory migration the default, but it is a one time cost that shouldn't really matter as long as cpuset.mems isn't changed frequenty. Update the cgroup-v2.rst file to document the new behavior and recommend against changing cpuset.mems frequently. Since there won't be any concurrent access to the newly allocated cpuset structure in cpuset_css_alloc(), we can use the cheaper non-atomic __set_bit() instead of the more expensive atomic set_bit(). Signed-off-by: Waiman Long <longman@redhat.com> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by: Tejun Heo <tj@kernel.org> |
||
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Paul Gortmaker
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12febc1818 |
x86/reboot: Document how to override DMI platform quirks
commit
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||
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Tushar Sugandhi
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00d43995f0 |
dm: add documentation for IMA measurement support
To interpret various DM target measurement data in IMA logs, a separate documentation page is needed under Documentation/admin-guide/device-mapper. Add documentation to help system administrators and attestation client/server component owners to interpret the measurement data generated by various DM targets, on various device/table state changes. Signed-off-by: Tushar Sugandhi <tusharsu@linux.microsoft.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com> |
||
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Mikulas Patocka
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e3a35d0340 |
dm writecache: add event counters
Add 10 counters for various events (hit, miss, etc) and export them in the status line (accessed from userspace with "dmsetup status"). Also add a message "clear_stats" that resets these counters. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com> |
||
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Yee Lee
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7a062ce318 |
arm64/cpufeature: Optionally disable MTE via command-line
MTE support needs to be optionally disabled in runtime for HW issue workaround, FW development and some evaluation works on system resource and performance. This patch makes two changes: (1) moves init of tag-allocation bits(ATA/ATA0) to cpu_enable_mte() as not cached in TLB. (2) allows ID_AA64PFR1_EL1.MTE to be overridden on its shadow value by giving "arm64.nomte" on cmdline. When the feature value is off, ATA and TCF will not set and the related functionalities are accordingly suppressed. Suggested-by: Catalin Marinas <catalin.marinas@arm.com> Suggested-by: Marc Zyngier <maz@kernel.org> Suggested-by: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: Yee Lee <yee.lee@mediatek.com> Link: https://lore.kernel.org/r/20210803070824.7586-2-yee.lee@mediatek.com Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> |
||
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Arnd Bergmann
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72bcad5393 |
wan: remove sbni/granch driver
The driver was merged in 1999 and has only ever seen treewide cleanups since then, with no indication whatsoever that anyone has actually had access to hardware for testing the patches. >From the information in the link below, it appears that the hardware is for some leased line system in Russia that has since been discontinued, and useless without any remote end to connect to. As the driver still feels like a Linux-2.2 era artifact today, it appears that the best way forward is to just delete it. Link: https://www.tms.ru/%D0%90%D0%B4%D0%B0%D0%BF%D1%82%D0%B5%D1%80_%D0%B4%D0%BB%D1%8F_%D0%B2%D1%8B%D0%B4%D0%B5%D0%BB%D0%B5%D0%BD%D0%BD%D1%8B%D1%85_%D0%BB%D0%B8%D0%BD%D0%B8%D0%B9_Granch_SBNI12-10 Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: David S. Miller <davem@davemloft.net> |
||
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Leon Romanovsky
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8d7e415d55 |
docs: Fix infiniband uverbs minor number
Starting from the beginning of infiniband subsystem, the uverbs char devices start from 192 as a minor number, see commit |
||
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Dmitry Safonov
|
10102a890b |
printk: Add printk.console_no_auto_verbose boot parameter
console_verbose() increases console loglevel to CONSOLE_LOGLEVEL_MOTORMOUTH, which provides more information to debug a panic/oops. Unfortunately, in Arista we maintain some DUTs (Device Under Test) that are configured to have 9600 baud rate. While verbose console messages have their value to post-analyze crashes, on such setup they: - may prevent panic/oops messages being printed - take too long to flush on console resulting in watchdog reboot In all our setups we use kdump which saves dmesg buffer after panic, so in reality those extra messages on console provide no additional value, but rather add risk of not getting to __crash_kexec(). Provide printk.console_no_auto_verbose boot parameter, which allows to switch off printk being verbose on oops/panic/lockdep. Cc: Andrew Morton <akpm@linux-foundation.org> Cc: John Ogness <john.ogness@linutronix.de> Cc: Petr Mladek <pmladek@suse.com> Cc: Sergey Senozhatsky <senozhatsky@chromium.org> Cc: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Dmitry Safonov <dima@arista.com> Suggested-by: Petr Mladek <pmladek@suse.com> Reviewed-by: Sergey Senozhatsky <senozhatsky@chromium.org> Reviewed-by: Petr Mladek <pmladek@suse.com> Tested-by: Petr Mladek <pmladek@suse.com> Signed-off-by: Petr Mladek <pmladek@suse.com> Link: https://lore.kernel.org/r/20210727130635.675184-3-dima@arista.com |
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Dave Jiang
|
ade8a86b51 |
dmaengine: idxd: Set defaults for GRPCFG traffic class
Set GRPCFG traffic class to value of 1 for best performance on current generation of accelerators. Also add override option to allow experimentation. Sysfs knobs are disabled for DSA/IAX gen1 devices. Signed-off-by: Dave Jiang <dave.jiang@intel.com> Link: https://lore.kernel.org/r/162681373005.1968485.3761065664382799202.stgit@djiang5-desk3.ch.intel.com Signed-off-by: Vinod Koul <vkoul@kernel.org> |
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Balbir Singh
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b7fe54f6c2 |
Documentation: Add L1D flushing Documentation
Add documentation of l1d flushing, explain the need for the feature and how it can be used. Signed-off-by: Balbir Singh <sblbir@amazon.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Link: https://lore.kernel.org/r/20210108121056.21940-6-sblbir@amazon.com |
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Zhen Lei
|
712d8f2058 |
iommu: Enhance IOMMU default DMA mode build options
First, add build options IOMMU_DEFAULT_{LAZY|STRICT}, so that we have the
opportunity to set {lazy|strict} mode as default at build time. Then put
the two config options in an choice, as they are mutually exclusive.
[jpg: Make choice between strict and lazy only (and not passthrough)]
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Link: https://lore.kernel.org/r/1626088340-5838-4-git-send-email-john.garry@huawei.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
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John Garry
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1d479f160c |
iommu: Deprecate Intel and AMD cmdline methods to enable strict mode
Now that the x86 drivers support iommu.strict, deprecate the custom methods. Signed-off-by: John Garry <john.garry@huawei.com> Acked-by: Robin Murphy <robin.murphy@arm.com> Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com> Link: https://lore.kernel.org/r/1626088340-5838-2-git-send-email-john.garry@huawei.com Signed-off-by: Joerg Roedel <jroedel@suse.de> |
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Yang Xu
|
d5caec394a |
admin-guide/cputopology.rst: Remove non-existed cpu-hotplug.txt
Since kernel commit
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Fabio M. De Francesco
|
ce48ee81a1 |
admin-guide/hw-vuln: Rephrase a section of core-scheduling.rst
Rephrase the "For MDS" section in core-scheduling.rst for the purpose of making it clearer what is meant by "kernel memory is still considered untrusted". Suggested-by: Vineeth Pillai <Vineeth.Pillai@microsoft.com> Signed-off-by: Fabio M. De Francesco <fmdefrancesco@gmail.com> Reviewed-by: Joel Fernandes (Google) <joelaf@google.com> Link: https://lore.kernel.org/r/20210721190250.26095-1-fmdefrancesco@gmail.com Signed-off-by: Jonathan Corbet <corbet@lwn.net> |
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Carlos Llamas
|
06e1721d2a |
docs: binderfs: add section about feature files
Document how binder feature files can be used to determine whether a feature is supported by the binder driver. "oneway_spam_detection" is used as an example as it is the first available feature file. Acked-by: Christian Brauner <christian.brauner@ubuntu.com> Signed-off-by: Carlos Llamas <cmllamas@google.com> Link: https://lore.kernel.org/r/20210715031805.1725878-2-cmllamas@google.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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|
Cengiz Can
|
f1285c68e1 |
Documentation: sysrq: convert to third person
Two parts of the sysrq documentation have sentences written from a first person's point of view. Documentation is generally written from a third person's view in a formal way. Convert those senteces to be less personal and generic. Signed-off-by: Cengiz Can <cengiz@kernel.wtf> Link: https://lore.kernel.org/r/20210629141508.52229-1-cengiz@kernel.wtf Signed-off-by: Jonathan Corbet <corbet@lwn.net> |
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Linus Torvalds
|
79160a603b |
USB / Thunderbolt patches for 5.14-rc1
Here is the big set of USB and Thunderbolt patches for 5.14-rc1. Nothing major here just lots of little changes for new hardware and features. Highlights are: - more USB 4 support added to the thunderbolt core - build warning fixes all over the place - usb-serial driver updates and new device support - mtu3 driver updates - gadget driver updates - dwc3 driver updates - dwc2 driver updates - isp1760 host driver updates - musb driver updates - lots of other tiny things. Full details are in the shortlog. All of these have been in linux-next for a while now with no reported issues. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> -----BEGIN PGP SIGNATURE----- iG0EABECAC0WIQT0tgzFv3jCIUoxPcsxR9QN2y37KQUCYOM3EA8cZ3JlZ0Brcm9h aC5jb20ACgkQMUfUDdst+ynGewCeMg7YvtCnqFBNebC+GfKpFTgWxO4AnAppjSrZ RPGQgfZdWmx7daCXWbSK =u68a -----END PGP SIGNATURE----- Merge tag 'usb-5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb Pull USB / Thunderbolt updates from Greg KH: "Here is the big set of USB and Thunderbolt patches for 5.14-rc1. Nothing major here just lots of little changes for new hardware and features. Highlights are: - more USB 4 support added to the thunderbolt core - build warning fixes all over the place - usb-serial driver updates and new device support - mtu3 driver updates - gadget driver updates - dwc3 driver updates - dwc2 driver updates - isp1760 host driver updates - musb driver updates - lots of other tiny things. Full details are in the shortlog. All of these have been in linux-next for a while now with no reported issues" * tag 'usb-5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (223 commits) phy: qcom-qusb2: Add configuration for SM4250 and SM6115 dt-bindings: phy: qcom,qusb2: document sm4250/6115 compatible dt-bindings: usb: qcom,dwc3: Add bindings for sm6115/4250 USB: cdc-acm: blacklist Heimann USB Appset device usb: xhci-mtk: allow multiple Start-Split in a microframe usb: ftdi-elan: remove redundant continue statement in a while-loop usb: class: cdc-wdm: return the correct errno code xhci: remove redundant continue statement usb: dwc3: Fix debugfs creation flow usb: gadget: hid: fix error return code in hid_bind() usb: gadget: eem: fix echo command packet response issue usb: gadget: f_hid: fix endianness issue with descriptors Revert "USB: misc: Add onboard_usb_hub driver" Revert "of/platform: Add stubs for of_platform_device_create/destroy()" Revert "usb: host: xhci-plat: Create platform device for onboard hubs in probe()" Revert "arm64: dts: qcom: sc7180-trogdor: Add nodes for onboard USB hub" xhci: solve a double free problem while doing s4 xhci: handle failed buffer copy to URB sg list and fix a W=1 copiler warning xhci: Add adaptive interrupt rate for isoch TRBs with XHCI_AVOID_BEI quirk xhci: Remove unused defines for ERST_SIZE and ERST_ENTRIES ... |
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Linus Torvalds
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c932ed0adb |
TTY / Serial patches for 5.14-rc1
Here is the big set of tty and serial driver patches for 5.14-rc1. A bit more than normal, but nothing major, lots of cleanups. Highlights are: - lots of tty api cleanups and mxser driver cleanups from Jiri - build warning fixes - various serial driver updates - coding style cleanups - various tty driver minor fixes and updates - removal of broken and disable r3964 line discipline (finally!) All of these have been in linux-next for a while with no reported issues. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> -----BEGIN PGP SIGNATURE----- iG0EABECAC0WIQT0tgzFv3jCIUoxPcsxR9QN2y37KQUCYOM4qQ8cZ3JlZ0Brcm9h aC5jb20ACgkQMUfUDdst+ylKvQCfbh+OmTkDlDlDhSWlxuV05M1XTXoAoLUcLZru s5JCnwSZztQQLMDHj7Pd =Zupm -----END PGP SIGNATURE----- Merge tag 'tty-5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty Pull tty / serial updates from Greg KH: "Here is the big set of tty and serial driver patches for 5.14-rc1. A bit more than normal, but nothing major, lots of cleanups. Highlights are: - lots of tty api cleanups and mxser driver cleanups from Jiri - build warning fixes - various serial driver updates - coding style cleanups - various tty driver minor fixes and updates - removal of broken and disable r3964 line discipline (finally!) All of these have been in linux-next for a while with no reported issues" * tag 'tty-5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (227 commits) serial: mvebu-uart: remove unused member nb from struct mvebu_uart arm64: dts: marvell: armada-37xx: Fix reg for standard variant of UART dt-bindings: mvebu-uart: fix documentation serial: mvebu-uart: correctly calculate minimal possible baudrate serial: mvebu-uart: do not allow changing baudrate when uartclk is not available serial: mvebu-uart: fix calculation of clock divisor tty: make linux/tty_flip.h self-contained serial: Prefer unsigned int to bare use of unsigned serial: 8250: 8250_omap: Fix possible interrupt storm on K3 SoCs serial: qcom_geni_serial: use DT aliases according to DT bindings Revert "tty: serial: Add UART driver for Cortina-Access platform" tty: serial: Add UART driver for Cortina-Access platform MAINTAINERS: add me back as mxser maintainer mxser: Documentation, fix typos mxser: Documentation, make the docs up-to-date mxser: Documentation, remove traces of callout device mxser: introduce mxser_16550A_or_MUST helper mxser: rename flags to old_speed in mxser_set_serial_info mxser: use port variable in mxser_set_serial_info mxser: access info->MCR under info->slock ... |
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Linus Torvalds
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28e92f9903 |
Merge branch 'core-rcu-2021.07.04' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu
Pull RCU updates from Paul McKenney: - Bitmap parsing support for "all" as an alias for all bits - Documentation updates - Miscellaneous fixes, including some that overlap into mm and lockdep - kvfree_rcu() updates - mem_dump_obj() updates, with acks from one of the slab-allocator maintainers - RCU NOCB CPU updates, including limited deoffloading - SRCU updates - Tasks-RCU updates - Torture-test updates * 'core-rcu-2021.07.04' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu: (78 commits) tasks-rcu: Make show_rcu_tasks_gp_kthreads() be static inline rcu-tasks: Make ksoftirqd provide RCU Tasks quiescent states rcu: Add missing __releases() annotation rcu: Remove obsolete rcu_read_unlock() deadlock commentary rcu: Improve comments describing RCU read-side critical sections rcu: Create an unrcu_pointer() to remove __rcu from a pointer srcu: Early test SRCU polling start rcu: Fix various typos in comments rcu/nocb: Unify timers rcu/nocb: Prepare for fine-grained deferred wakeup rcu/nocb: Only cancel nocb timer if not polling rcu/nocb: Delete bypass_timer upon nocb_gp wakeup rcu/nocb: Cancel nocb_timer upon nocb_gp wakeup rcu/nocb: Allow de-offloading rdp leader rcu/nocb: Directly call __wake_nocb_gp() from bypass timer rcu: Don't penalize priority boosting when there is nothing to boost rcu: Point to documentation of ordering guarantees rcu: Make rcu_gp_cleanup() be noinline for tracing rcu: Restrict RCU_STRICT_GRACE_PERIOD to at most four CPUs rcu: Make show_rcu_gp_kthreads() dump rcu_node structures blocking GP ... |
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Linus Torvalds
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757fa80f4e |
Tracing updates for 5.14:
- Added option for per CPU threads to the hwlat tracer
- Have hwlat tracer handle hotplug CPUs
- New tracer: osnoise, that detects latency caused by interrupts, softirqs
and scheduling of other tasks.
- Added timerlat tracer that creates a thread and measures in detail what
sources of latency it has for wake ups.
- Removed the "success" field of the sched_wakeup trace event.
This has been hardcoded as "1" since 2015, no tooling should be looking
at it now. If one exists, we can revert this commit, fix that tool and
try to remove it again in the future.
- tgid mapping fixed to handle more than PID_MAX_DEFAULT pids/tgids.
- New boot command line option "tp_printk_stop", as tp_printk causes trace
events to write to console. When user space starts, this can easily live
lock the system. Having a boot option to stop just after boot up is
useful to prevent that from happening.
- Have ftrace_dump_on_oops boot command line option take numbers that match
the numbers shown in /proc/sys/kernel/ftrace_dump_on_oops.
- Bootconfig clean ups, fixes and enhancements.
- New ktest script that tests bootconfig options.
- Add tracepoint_probe_register_may_exist() to register a tracepoint
without triggering a WARN*() if it already exists. BPF has a path from
user space that can do this. All other paths are considered a bug.
- Small clean ups and fixes
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Merge tag 'trace-v5.14' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull tracing updates from Steven Rostedt:
- Added option for per CPU threads to the hwlat tracer
- Have hwlat tracer handle hotplug CPUs
- New tracer: osnoise, that detects latency caused by interrupts,
softirqs and scheduling of other tasks.
- Added timerlat tracer that creates a thread and measures in detail
what sources of latency it has for wake ups.
- Removed the "success" field of the sched_wakeup trace event. This has
been hardcoded as "1" since 2015, no tooling should be looking at it
now. If one exists, we can revert this commit, fix that tool and try
to remove it again in the future.
- tgid mapping fixed to handle more than PID_MAX_DEFAULT pids/tgids.
- New boot command line option "tp_printk_stop", as tp_printk causes
trace events to write to console. When user space starts, this can
easily live lock the system. Having a boot option to stop just after
boot up is useful to prevent that from happening.
- Have ftrace_dump_on_oops boot command line option take numbers that
match the numbers shown in /proc/sys/kernel/ftrace_dump_on_oops.
- Bootconfig clean ups, fixes and enhancements.
- New ktest script that tests bootconfig options.
- Add tracepoint_probe_register_may_exist() to register a tracepoint
without triggering a WARN*() if it already exists. BPF has a path
from user space that can do this. All other paths are considered a
bug.
- Small clean ups and fixes
* tag 'trace-v5.14' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: (49 commits)
tracing: Resize tgid_map to pid_max, not PID_MAX_DEFAULT
tracing: Simplify & fix saved_tgids logic
treewide: Add missing semicolons to __assign_str uses
tracing: Change variable type as bool for clean-up
trace/timerlat: Fix indentation on timerlat_main()
trace/osnoise: Make 'noise' variable s64 in run_osnoise()
tracepoint: Add tracepoint_probe_register_may_exist() for BPF tracing
tracing: Fix spelling in osnoise tracer "interferences" -> "interference"
Documentation: Fix a typo on trace/osnoise-tracer
trace/osnoise: Fix return value on osnoise_init_hotplug_support
trace/osnoise: Make interval u64 on osnoise_main
trace/osnoise: Fix 'no previous prototype' warnings
tracing: Have osnoise_main() add a quiescent state for task rcu
seq_buf: Make trace_seq_putmem_hex() support data longer than 8
seq_buf: Fix overflow in seq_buf_putmem_hex()
trace/osnoise: Support hotplug operations
trace/hwlat: Support hotplug operations
trace/hwlat: Protect kdata->kthread with get/put_online_cpus
trace: Add timerlat tracer
trace: Add osnoise tracer
...
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Linus Torvalds
|
cd3eb7efaa |
IOMMU Updates for Linux v5.14
Including:
- SMMU Updates from Will Deacon:
- SMMUv3: Support stalling faults for platform devices
- SMMUv3: Decrease defaults sizes for the event and PRI queues
- SMMUv2: Support for a new '->probe_finalize' hook, needed by Nvidia
- SMMUv2: Even more Qualcomm compatible strings
- SMMUv2: Avoid Adreno TTBR1 quirk for DB820C platform
- Intel VT-d updates from Lu Baolu:
- Convert Intel IOMMU to use sva_lib helpers in iommu core
- ftrace and debugfs supports for page fault handling
- Support asynchronous nested capabilities
- Various misc cleanups
- Support for new VIOT ACPI table to make the VirtIO IOMMU:
available on x86
- Add the amd_iommu=force_enable command line option to
enable the IOMMU on platforms where they are known to cause
problems
- Support for version 2 of the Rockchip IOMMU
- Various smaller fixes, cleanups and refactorings
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Merge tag 'iommu-updates-v5.14' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
Pull iommu updates from Joerg Roedel:
- SMMU Updates from Will Deacon:
- SMMUv3:
- Support stalling faults for platform devices
- Decrease defaults sizes for the event and PRI queues
- SMMUv2:
- Support for a new '->probe_finalize' hook, needed by Nvidia
- Even more Qualcomm compatible strings
- Avoid Adreno TTBR1 quirk for DB820C platform
- Intel VT-d updates from Lu Baolu:
- Convert Intel IOMMU to use sva_lib helpers in iommu core
- ftrace and debugfs supports for page fault handling
- Support asynchronous nested capabilities
- Various misc cleanups
- Support for new VIOT ACPI table to make the VirtIO IOMMU
available on x86
- Add the amd_iommu=force_enable command line option to enable
the IOMMU on platforms where they are known to cause problems
- Support for version 2 of the Rockchip IOMMU
- Various smaller fixes, cleanups and refactorings
* tag 'iommu-updates-v5.14' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (66 commits)
iommu/virtio: Enable x86 support
iommu/dma: Pass address limit rather than size to iommu_setup_dma_ops()
ACPI: Add driver for the VIOT table
ACPI: Move IOMMU setup code out of IORT
ACPI: arm64: Move DMA setup operations out of IORT
iommu/vt-d: Fix dereference of pointer info before it is null checked
iommu: Update "iommu.strict" documentation
iommu/arm-smmu: Check smmu->impl pointer before dereferencing
iommu/arm-smmu-v3: Remove unnecessary oom message
iommu/arm-smmu: Fix arm_smmu_device refcount leak in address translation
iommu/arm-smmu: Fix arm_smmu_device refcount leak when arm_smmu_rpm_get fails
iommu/vt-d: Fix linker error on 32-bit
iommu/vt-d: No need to typecast
iommu/vt-d: Define counter explicitly as unsigned int
iommu/vt-d: Remove unnecessary braces
iommu/vt-d: Removed unused iommu_count in dmar domain
iommu/vt-d: Use bitfields for DMAR capabilities
iommu/vt-d: Use DEVICE_ATTR_RO macro
iommu/vt-d: Fix out-bounds-warning in intel/svm.c
iommu/vt-d: Add PRQ handling latency sampling
...
|
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Linus Torvalds
|
71bd934101 |
Merge branch 'akpm' (patches from Andrew)
Merge more updates from Andrew Morton: "190 patches. Subsystems affected by this patch series: mm (hugetlb, userfaultfd, vmscan, kconfig, proc, z3fold, zbud, ras, mempolicy, memblock, migration, thp, nommu, kconfig, madvise, memory-hotplug, zswap, zsmalloc, zram, cleanups, kfence, and hmm), procfs, sysctl, misc, core-kernel, lib, lz4, checkpatch, init, kprobes, nilfs2, hfs, signals, exec, kcov, selftests, compress/decompress, and ipc" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (190 commits) ipc/util.c: use binary search for max_idx ipc/sem.c: use READ_ONCE()/WRITE_ONCE() for use_global_lock ipc: use kmalloc for msg_queue and shmid_kernel ipc sem: use kvmalloc for sem_undo allocation lib/decompressors: remove set but not used variabled 'level' selftests/vm/pkeys: exercise x86 XSAVE init state selftests/vm/pkeys: refill shadow register after implicit kernel write selftests/vm/pkeys: handle negative sys_pkey_alloc() return code selftests/vm/pkeys: fix alloc_random_pkey() to make it really, really random kcov: add __no_sanitize_coverage to fix noinstr for all architectures exec: remove checks in __register_bimfmt() x86: signal: don't do sas_ss_reset() until we are certain that sigframe won't be abandoned hfsplus: report create_date to kstat.btime hfsplus: remove unnecessary oom message nilfs2: remove redundant continue statement in a while-loop kprobes: remove duplicated strong free_insn_page in x86 and s390 init: print out unknown kernel parameters checkpatch: do not complain about positive return values starting with EPOLL checkpatch: improve the indented label test checkpatch: scripts/spdxcheck.py now requires python3 ... |
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Linus Torvalds
|
3dbdb38e28 |
Merge branch 'for-5.14' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
Pull cgroup updates from Tejun Heo: - cgroup.kill is added which implements atomic killing of the whole subtree. Down the line, this should be able to replace the multiple userland implementations of "keep killing till empty". - PSI can now be turned off at boot time to avoid overhead for configurations which don't care about PSI. * 'for-5.14' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup: cgroup: make per-cgroup pressure stall tracking configurable cgroup: Fix kernel-doc cgroup: inline cgroup_task_freeze() tests/cgroup: test cgroup.kill tests/cgroup: move cg_wait_for(), cg_prepare_for_wait() tests/cgroup: use cgroup.kill in cg_killall() docs/cgroup: add entry for cgroup.kill cgroup: introduce cgroup.kill |
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Axel Rasmussen
|
964ab0040f |
userfaultfd/shmem: advertise shmem minor fault support
Now that the feature is fully implemented (the faulting path hooks exist so userspace is notified, and the ioctl to resolve such faults is available), advertise this as a supported feature. Link: https://lkml.kernel.org/r/20210503180737.2487560-6-axelrasmussen@google.com Signed-off-by: Axel Rasmussen <axelrasmussen@google.com> Acked-by: Hugh Dickins <hughd@google.com> Acked-by: Peter Xu <peterx@redhat.com> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Brian Geffon <bgeffon@google.com> Cc: "Dr . David Alan Gilbert" <dgilbert@redhat.com> Cc: Jerome Glisse <jglisse@redhat.com> Cc: Joe Perches <joe@perches.com> Cc: Kirill A. Shutemov <kirill@shutemov.name> Cc: Lokesh Gidra <lokeshgidra@google.com> Cc: Mike Kravetz <mike.kravetz@oracle.com> Cc: Mike Rapoport <rppt@linux.vnet.ibm.com> Cc: Mina Almasry <almasrymina@google.com> Cc: Oliver Upton <oupton@google.com> Cc: Shaohua Li <shli@fb.com> Cc: Shuah Khan <shuah@kernel.org> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Wang Qing <wangqing@vivo.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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Peter Xu
|
fb8e37f35a |
mm/pagemap: export uffd-wp protection information
Export the PTE/PMD status of uffd-wp to pagemap too. Link: https://lkml.kernel.org/r/20210428225030.9708-6-peterx@redhat.com Signed-off-by: Peter Xu <peterx@redhat.com> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Axel Rasmussen <axelrasmussen@google.com> Cc: Brian Geffon <bgeffon@google.com> Cc: "Dr . David Alan Gilbert" <dgilbert@redhat.com> Cc: Hugh Dickins <hughd@google.com> Cc: Jerome Glisse <jglisse@redhat.com> Cc: Joe Perches <joe@perches.com> Cc: Kirill A. Shutemov <kirill@shutemov.name> Cc: Lokesh Gidra <lokeshgidra@google.com> Cc: Mike Kravetz <mike.kravetz@oracle.com> Cc: Mike Rapoport <rppt@linux.vnet.ibm.com> Cc: Mina Almasry <almasrymina@google.com> Cc: Oliver Upton <oupton@google.com> Cc: Shaohua Li <shli@fb.com> Cc: Shuah Khan <shuah@kernel.org> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Wang Qing <wangqing@vivo.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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Muchun Song
|
e6d41f12df |
mm: hugetlb: introduce CONFIG_HUGETLB_PAGE_FREE_VMEMMAP_DEFAULT_ON
When using HUGETLB_PAGE_FREE_VMEMMAP, the freeing unused vmemmap pages associated with each HugeTLB page is default off. Now the vmemmap is PMD mapped. So there is no side effect when this feature is enabled with no HugeTLB pages in the system. Someone may want to enable this feature in the compiler time instead of using boot command line. So add a config to make it default on when someone do not want to enable it via command line. Link: https://lkml.kernel.org/r/20210616094915.34432-4-songmuchun@bytedance.com Signed-off-by: Muchun Song <songmuchun@bytedance.com> Cc: Chen Huang <chenhuang5@huawei.com> Cc: David Hildenbrand <david@redhat.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Michal Hocko <mhocko@suse.com> Cc: Mike Kravetz <mike.kravetz@oracle.com> Cc: Oscar Salvador <osalvador@suse.de> Cc: Xiongchun Duan <duanxiongchun@bytedance.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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Muchun Song
|
2d7a21715f |
mm: sparsemem: use huge PMD mapping for vmemmap pages
The preparation of splitting huge PMD mapping of vmemmap pages is ready, so switch the mapping from PTE to PMD. Link: https://lkml.kernel.org/r/20210616094915.34432-3-songmuchun@bytedance.com Signed-off-by: Muchun Song <songmuchun@bytedance.com> Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com> Cc: Chen Huang <chenhuang5@huawei.com> Cc: David Hildenbrand <david@redhat.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Michal Hocko <mhocko@suse.com> Cc: Oscar Salvador <osalvador@suse.de> Cc: Xiongchun Duan <duanxiongchun@bytedance.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
||
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Muchun Song
|
4bab4964a5 |
mm: memory_hotplug: disable memmap_on_memory when hugetlb_free_vmemmap enabled
The parameter of memory_hotplug.memmap_on_memory is not compatible with hugetlb_free_vmemmap. So disable it when hugetlb_free_vmemmap is enabled. [akpm@linux-foundation.org: remove unneeded include, per Oscar] Link: https://lkml.kernel.org/r/20210510030027.56044-9-songmuchun@bytedance.com Signed-off-by: Muchun Song <songmuchun@bytedance.com> Acked-by: Mike Kravetz <mike.kravetz@oracle.com> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Andy Lutomirski <luto@kernel.org> Cc: Anshuman Khandual <anshuman.khandual@arm.com> Cc: Balbir Singh <bsingharora@gmail.com> Cc: Barry Song <song.bao.hua@hisilicon.com> Cc: Bodeddula Balasubramaniam <bodeddub@amazon.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Chen Huang <chenhuang5@huawei.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: David Hildenbrand <david@redhat.com> Cc: David Rientjes <rientjes@google.com> Cc: HORIGUCHI NAOYA <naoya.horiguchi@nec.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Joao Martins <joao.m.martins@oracle.com> Cc: Joerg Roedel <jroedel@suse.de> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Matthew Wilcox <willy@infradead.org> Cc: Miaohe Lin <linmiaohe@huawei.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Mina Almasry <almasrymina@google.com> Cc: Oliver Neukum <oneukum@suse.com> Cc: Oscar Salvador <osalvador@suse.de> Cc: Paul E. McKenney <paulmck@kernel.org> Cc: Pawan Gupta <pawan.kumar.gupta@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Xiongchun Duan <duanxiongchun@bytedance.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
||
|
Muchun Song
|
e9fdff87e8 |
mm: hugetlb: add a kernel parameter hugetlb_free_vmemmap
Add a kernel parameter hugetlb_free_vmemmap to enable the feature of freeing unused vmemmap pages associated with each hugetlb page on boot. We disable PMD mapping of vmemmap pages for x86-64 arch when this feature is enabled. Because vmemmap_remap_free() depends on vmemmap being base page mapped. Link: https://lkml.kernel.org/r/20210510030027.56044-8-songmuchun@bytedance.com Signed-off-by: Muchun Song <songmuchun@bytedance.com> Reviewed-by: Oscar Salvador <osalvador@suse.de> Reviewed-by: Barry Song <song.bao.hua@hisilicon.com> Reviewed-by: Miaohe Lin <linmiaohe@huawei.com> Tested-by: Chen Huang <chenhuang5@huawei.com> Tested-by: Bodeddula Balasubramaniam <bodeddub@amazon.com> Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Andy Lutomirski <luto@kernel.org> Cc: Anshuman Khandual <anshuman.khandual@arm.com> Cc: Balbir Singh <bsingharora@gmail.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: David Hildenbrand <david@redhat.com> Cc: David Rientjes <rientjes@google.com> Cc: HORIGUCHI NAOYA <naoya.horiguchi@nec.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Joao Martins <joao.m.martins@oracle.com> Cc: Joerg Roedel <jroedel@suse.de> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Matthew Wilcox <willy@infradead.org> Cc: Michal Hocko <mhocko@suse.com> Cc: Mina Almasry <almasrymina@google.com> Cc: Oliver Neukum <oneukum@suse.com> Cc: Paul E. McKenney <paulmck@kernel.org> Cc: Pawan Gupta <pawan.kumar.gupta@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Xiongchun Duan <duanxiongchun@bytedance.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
||
|
Muchun Song
|
ad2fa3717b |
mm: hugetlb: alloc the vmemmap pages associated with each HugeTLB page
When we free a HugeTLB page to the buddy allocator, we need to allocate
the vmemmap pages associated with it. However, we may not be able to
allocate the vmemmap pages when the system is under memory pressure. In
this case, we just refuse to free the HugeTLB page. This changes behavior
in some corner cases as listed below:
1) Failing to free a huge page triggered by the user (decrease nr_pages).
User needs to try again later.
2) Failing to free a surplus huge page when freed by the application.
Try again later when freeing a huge page next time.
3) Failing to dissolve a free huge page on ZONE_MOVABLE via
offline_pages().
This can happen when we have plenty of ZONE_MOVABLE memory, but
not enough kernel memory to allocate vmemmmap pages. We may even
be able to migrate huge page contents, but will not be able to
dissolve the source huge page. This will prevent an offline
operation and is unfortunate as memory offlining is expected to
succeed on movable zones. Users that depend on memory hotplug
to succeed for movable zones should carefully consider whether the
memory savings gained from this feature are worth the risk of
possibly not being able to offline memory in certain situations.
4) Failing to dissolve a huge page on CMA/ZONE_MOVABLE via
alloc_contig_range() - once we have that handling in place. Mainly
affects CMA and virtio-mem.
Similar to 3). virito-mem will handle migration errors gracefully.
CMA might be able to fallback on other free areas within the CMA
region.
Vmemmap pages are allocated from the page freeing context. In order for
those allocations to be not disruptive (e.g. trigger oom killer)
__GFP_NORETRY is used. hugetlb_lock is dropped for the allocation because
a non sleeping allocation would be too fragile and it could fail too
easily under memory pressure. GFP_ATOMIC or other modes to access memory
reserves is not used because we want to prevent consuming reserves under
heavy hugetlb freeing.
[mike.kravetz@oracle.com: fix dissolve_free_huge_page use of tail/head page]
Link: https://lkml.kernel.org/r/20210527231225.226987-1-mike.kravetz@oracle.com
[willy@infradead.org: fix alloc_vmemmap_page_list documentation warning]
Link: https://lkml.kernel.org/r/20210615200242.1716568-6-willy@infradead.org
Link: https://lkml.kernel.org/r/20210510030027.56044-7-songmuchun@bytedance.com
Signed-off-by: Muchun Song <songmuchun@bytedance.com>
Signed-off-by: Mike Kravetz <mike.kravetz@oracle.com>
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
Reviewed-by: Oscar Salvador <osalvador@suse.de>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Balbir Singh <bsingharora@gmail.com>
Cc: Barry Song <song.bao.hua@hisilicon.com>
Cc: Bodeddula Balasubramaniam <bodeddub@amazon.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Chen Huang <chenhuang5@huawei.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: David Rientjes <rientjes@google.com>
Cc: HORIGUCHI NAOYA <naoya.horiguchi@nec.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Joao Martins <joao.m.martins@oracle.com>
Cc: Joerg Roedel <jroedel@suse.de>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Miaohe Lin <linmiaohe@huawei.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mina Almasry <almasrymina@google.com>
Cc: Oliver Neukum <oneukum@suse.com>
Cc: Paul E. McKenney <paulmck@kernel.org>
Cc: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Xiongchun Duan <duanxiongchun@bytedance.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
||
|
Linus Torvalds
|
2cfa582be8 |
- Various DM persistent-data library improvements and fixes that
benefit both the DM thinp and cache targets. - A few small DM kcopyd efficiency improvements. - Significant zoned related block core, DM core and DM zoned target changes that culminate with adding zoned append emulation (which is required to properly fix DM crypt's zoned support). - Various DM writecache target changes that improve efficiency. Adds an optional "metadata_only" feature that only promotes bios flagged with REQ_META. But the most significant improvement is writecache's ability to pause writeback, for a confiurable time, if/when the working set is larger than the cache (and the cache is full) -- this ensures performance is no worse than the slower origin device. -----BEGIN PGP SIGNATURE----- iQEzBAABCAAdFiEEJfWUX4UqZ4x1O2wixSPxCi2dA1oFAmDcpWgACgkQxSPxCi2d A1pD0AgAmySdpJxQBzBMOqnKaClErfxiWXDtvzBxFupG/jmqaN/k/kCFdKyDk89M 9r2rlv4+teZReEGjqjJ0umQgbX62x5y6f7vy4CeoE/+EQAUiZYXNARW8Uubu/Sgy mmvsgAdiuJqfJCX5TiQDwZIdll/QV8isteddMpOdrdM0fpCNlTvRao4S9UE2Rfni fPoPu7KNGDhKORvy/NloYFSHuxTaOSv6A44z15T2SoXPw9hLloFoXegE9Vrcfr/j gwLX3ponp4+K91BzPWz0QIQ7Wh+7O4xrmcXtBIvuIGNcfV+oGMZMtq/zEX8T6sDh GDlclxh/76iGgvINAQ437mXBINbPYQ== =8dUv -----END PGP SIGNATURE----- Merge tag 'for-5.14/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm Pull device mapper updates from Mike Snitzer: - Various DM persistent-data library improvements and fixes that benefit both the DM thinp and cache targets. - A few small DM kcopyd efficiency improvements. - Significant zoned related block core, DM core and DM zoned target changes that culminate with adding zoned append emulation (which is required to properly fix DM crypt's zoned support). - Various DM writecache target changes that improve efficiency. Adds an optional "metadata_only" feature that only promotes bios flagged with REQ_META. But the most significant improvement is writecache's ability to pause writeback, for a confiurable time, if/when the working set is larger than the cache (and the cache is full) -- this ensures performance is no worse than the slower origin device. * tag 'for-5.14/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm: (35 commits) dm writecache: make writeback pause configurable dm writecache: pause writeback if cache full and origin being written directly dm io tracker: factor out IO tracker dm btree remove: assign new_root only when removal succeeds dm zone: fix dm_revalidate_zones() memory allocation dm ps io affinity: remove redundant continue statement dm writecache: add optional "metadata_only" parameter dm writecache: add "cleaner" and "max_age" to Documentation dm writecache: write at least 4k when committing dm writecache: flush origin device when writing and cache is full dm writecache: have ssd writeback wait if the kcopyd workqueue is busy dm writecache: use list_move instead of list_del/list_add in writecache_writeback() dm writecache: commit just one block, not a full page dm writecache: remove unused gfp_t argument from wc_add_block() dm crypt: Fix zoned block device support dm: introduce zone append emulation dm: rearrange core declarations for extended use from dm-zone.c block: introduce BIO_ZONE_WRITE_LOCKED bio flag block: introduce bio zone helpers block: improve handling of all zones reset operation ... |
||
|
Linus Torvalds
|
df668a5fe4 |
for-5.14/block-2021-06-29
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|
Linus Torvalds
|
65090f30ab |
Merge branch 'akpm' (patches from Andrew)
Merge misc updates from Andrew Morton: "191 patches. Subsystems affected by this patch series: kthread, ia64, scripts, ntfs, squashfs, ocfs2, kernel/watchdog, and mm (gup, pagealloc, slab, slub, kmemleak, dax, debug, pagecache, gup, swap, memcg, pagemap, mprotect, bootmem, dma, tracing, vmalloc, kasan, initialization, pagealloc, and memory-failure)" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (191 commits) mm,hwpoison: make get_hwpoison_page() call get_any_page() mm,hwpoison: send SIGBUS with error virutal address mm/page_alloc: split pcp->high across all online CPUs for cpuless nodes mm/page_alloc: allow high-order pages to be stored on the per-cpu lists mm: replace CONFIG_FLAT_NODE_MEM_MAP with CONFIG_FLATMEM mm: replace CONFIG_NEED_MULTIPLE_NODES with CONFIG_NUMA docs: remove description of DISCONTIGMEM arch, mm: remove stale mentions of DISCONIGMEM mm: remove CONFIG_DISCONTIGMEM m68k: remove support for DISCONTIGMEM arc: remove support for DISCONTIGMEM arc: update comment about HIGHMEM implementation alpha: remove DISCONTIGMEM and NUMA mm/page_alloc: move free_the_page mm/page_alloc: fix counting of managed_pages mm/page_alloc: improve memmap_pages dbg msg mm: drop SECTION_SHIFT in code comments mm/page_alloc: introduce vm.percpu_pagelist_high_fraction mm/page_alloc: limit the number of pages on PCP lists when reclaim is active mm/page_alloc: scale the number of pages that are batch freed ... |
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|
Linus Torvalds
|
5e6928249b |
ACPI updates for 5.14-rc1
- Update ACPICA code in the kernel to upstrea revision 20210604
including the following changes:
* Add defines for the CXL Host Bridge Structureand and add the
CFMWS structure definition to CEDT (Alison Schofield).
* iASL: Finish support for the IVRS ACPI table (Bob Moore).
* iASL: Add support for the SVKL table (Bob Moore).
* iASL: Add full support for RGRT ACPI table (Bob Moore).
* iASL: Add support for the BDAT ACPI table (Bob Moore).
* iASL: add disassembler support for PRMT (Erik Kaneda).
* Fix memory leak caused by _CID repair function (Erik Kaneda).
* Add support for PlatformRtMechanism OpRegion (Erik Kaneda).
* Add PRMT module header to facilitate parsing (Erik Kaneda).
* Add _PLD panel positions (Fabian Wüthrich).
* MADT: add Multiprocessor Wakeup Mailbox Structure and the
SVKL table headers (Kuppuswamy Sathyanarayanan).
* Use ACPI_FALLTHROUGH (Wei Ming Chen).
- Add preliminary support for the Platform Runtime Mechanism (PRM)
to allow the AML interpreter to call PRM functions (Erik Kaneda).
- Address some issues related to the handling of device dependencies
reported by _DEP in the ACPI device enumeration code and clean up
some related pieces of it (Rafael Wysocki).
- Improve the tracking of states of ACPI power resources (Rafael
Wysocki).
- Improve ACPI support for suspend-to-idle on AMD systems (Alex
Deucher, Mario Limonciello, Pratik Vishwakarma).
- Continue the unification and cleanup of message printing in the
ACPI code (Hanjun Guo, Heiner Kallweit).
- Fix possible buffer overrun issue with the description_show()
sysfs attribute method (Krzysztof Wilczyński).
- Improve the acpi_mask_gpe kernel command line parameter handling
and clean up the core ACPI code related to sysfs (Andy Shevchenko,
Baokun Li, Clayton Casciato).
- Postpone bringing devices in the general ACPI PM domain to D0
during resume from system-wide suspend until they are really
needed (Dmitry Torokhov).
- Make the ACPI processor driver fix up C-state latency if not
ordered (Mario Limonciello).
- Add support for identifying devices depening on the given one
that are not its direct descendants with the help of _DEP (Daniel
Scally).
- Extend the checks related to ACPI IRQ overrides on x86 in order to
avoid false-positives (Hui Wang).
- Add battery DPTF participant for Intel SoCs (Sumeet Pawnikar).
- Rearrange the ACPI fan driver and device power management code to
use a common list of device IDs (Rafael Wysocki).
- Fix clang CFI violation in the ACPI BGRT table parsing code and
clean it up (Nathan Chancellor).
- Add GPE-related quirks for some laptops to the EC driver (Chris
Chiu, Zhang Rui).
- Make the ACPI PPTT table parsing code populate the cache-id
value if present in the firmware (James Morse).
- Remove redundant clearing of context->ret.pointer from
acpi_run_osc() (Hans de Goede).
- Add missing acpi_put_table() in acpi_init_fpdt() (Jing Xiangfeng).
- Make ACPI APEI handle ARM Processor Error CPER records like
Memory Error ones to avoid user space task lockups (Xiaofei Tan).
- Stop warning about disabled ACPI in APEI (Jon Hunter).
- Fix fall-through warning for Clang in the SBSHC driver (Gustavo A.
R. Silva).
- Add custom DSDT file as Makefile prerequisite (Richard Fitzgerald).
- Initialize local variable to avoid garbage being returned (Colin
Ian King).
- Simplify assorted pieces of code, address assorted coding style
and documentation issues and comment typos (Baokun Li, Christophe
JAILLET, Clayton Casciato, Liu Shixin, Shaokun Zhang, Wei Yongjun,
Yang Li, Zhen Lei).
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Merge tag 'acpi-5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull ACPI updates from Rafael Wysocki:
"These update the ACPICA code in the kernel to the 20210604 upstream
revision, add preliminary support for the Platform Runtime Mechanism
(PRM), address issues related to the handling of device dependencies
in the ACPI device eunmeration code, improve the tracking of ACPI
power resource states, improve the ACPI support for suspend-to-idle on
AMD systems, continue the unification of message printing in the ACPI
code, address assorted issues and clean up the code in a number of
places.
Specifics:
- Update ACPICA code in the kernel to upstrea revision 20210604
including the following changes:
- Add defines for the CXL Host Bridge Structureand and add the
CFMWS structure definition to CEDT (Alison Schofield).
- iASL: Finish support for the IVRS ACPI table (Bob Moore).
- iASL: Add support for the SVKL table (Bob Moore).
- iASL: Add full support for RGRT ACPI table (Bob Moore).
- iASL: Add support for the BDAT ACPI table (Bob Moore).
- iASL: add disassembler support for PRMT (Erik Kaneda).
- Fix memory leak caused by _CID repair function (Erik Kaneda).
- Add support for PlatformRtMechanism OpRegion (Erik Kaneda).
- Add PRMT module header to facilitate parsing (Erik Kaneda).
- Add _PLD panel positions (Fabian Wüthrich).
- MADT: add Multiprocessor Wakeup Mailbox Structure and the SVKL
table headers (Kuppuswamy Sathyanarayanan).
- Use ACPI_FALLTHROUGH (Wei Ming Chen).
- Add preliminary support for the Platform Runtime Mechanism (PRM) to
allow the AML interpreter to call PRM functions (Erik Kaneda).
- Address some issues related to the handling of device dependencies
reported by _DEP in the ACPI device enumeration code and clean up
some related pieces of it (Rafael Wysocki).
- Improve the tracking of states of ACPI power resources (Rafael
Wysocki).
- Improve ACPI support for suspend-to-idle on AMD systems (Alex
Deucher, Mario Limonciello, Pratik Vishwakarma).
- Continue the unification and cleanup of message printing in the
ACPI code (Hanjun Guo, Heiner Kallweit).
- Fix possible buffer overrun issue with the description_show() sysfs
attribute method (Krzysztof Wilczyński).
- Improve the acpi_mask_gpe kernel command line parameter handling
and clean up the core ACPI code related to sysfs (Andy Shevchenko,
Baokun Li, Clayton Casciato).
- Postpone bringing devices in the general ACPI PM domain to D0
during resume from system-wide suspend until they are really needed
(Dmitry Torokhov).
- Make the ACPI processor driver fix up C-state latency if not
ordered (Mario Limonciello).
- Add support for identifying devices depening on the given one that
are not its direct descendants with the help of _DEP (Daniel
Scally).
- Extend the checks related to ACPI IRQ overrides on x86 in order to
avoid false-positives (Hui Wang).
- Add battery DPTF participant for Intel SoCs (Sumeet Pawnikar).
- Rearrange the ACPI fan driver and device power management code to
use a common list of device IDs (Rafael Wysocki).
- Fix clang CFI violation in the ACPI BGRT table parsing code and
clean it up (Nathan Chancellor).
- Add GPE-related quirks for some laptops to the EC driver (Chris
Chiu, Zhang Rui).
- Make the ACPI PPTT table parsing code populate the cache-id value
if present in the firmware (James Morse).
- Remove redundant clearing of context->ret.pointer from
acpi_run_osc() (Hans de Goede).
- Add missing acpi_put_table() in acpi_init_fpdt() (Jing Xiangfeng).
- Make ACPI APEI handle ARM Processor Error CPER records like Memory
Error ones to avoid user space task lockups (Xiaofei Tan).
- Stop warning about disabled ACPI in APEI (Jon Hunter).
- Fix fall-through warning for Clang in the SBSHC driver (Gustavo A.
R. Silva).
- Add custom DSDT file as Makefile prerequisite (Richard Fitzgerald).
- Initialize local variable to avoid garbage being returned (Colin
Ian King).
- Simplify assorted pieces of code, address assorted coding style and
documentation issues and comment typos (Baokun Li, Christophe
JAILLET, Clayton Casciato, Liu Shixin, Shaokun Zhang, Wei Yongjun,
Yang Li, Zhen Lei)"
* tag 'acpi-5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (97 commits)
ACPI: PM: postpone bringing devices to D0 unless we need them
ACPI: tables: Add custom DSDT file as makefile prerequisite
ACPI: bgrt: Use sysfs_emit
ACPI: bgrt: Fix CFI violation
ACPI: EC: trust DSDT GPE for certain HP laptop
ACPI: scan: Simplify acpi_table_events_fn()
ACPI: PM: Adjust behavior for field problems on AMD systems
ACPI: PM: s2idle: Add support for new Microsoft UUID
ACPI: PM: s2idle: Add support for multiple func mask
ACPI: PM: s2idle: Refactor common code
ACPI: PM: s2idle: Use correct revision id
ACPI: sysfs: Remove tailing return statement in void function
ACPI: sysfs: Use __ATTR_RO() and __ATTR_RW() macros
ACPI: sysfs: Sort headers alphabetically
ACPI: sysfs: Refactor param_get_trace_state() to drop dead code
ACPI: sysfs: Unify pattern of memory allocations
ACPI: sysfs: Allow bitmap list to be supplied to acpi_mask_gpe
ACPI: sysfs: Make sparse happy about address space in use
ACPI: scan: Fix race related to dropping dependencies
ACPI: scan: Reorganize acpi_device_add()
...
|
||
|
Linus Torvalds
|
3563f55ce6 |
Power management updates for 5.14-rc1
- Make intel_pstate support hybrid processors using abstract
performance units in the HWP interface (Rafael Wysocki).
- Add Icelake servers and Cometlake support in no-HWP mode to
intel_pstate (Giovanni Gherdovich).
- Make cpufreq_online() error path be consistent with the CPU
device removal path in cpufreq (Rafael Wysocki).
- Clean up 3 cpufreq drivers and the statistics code (Hailong Liu,
Randy Dunlap, Shaokun Zhang).
- Make intel_idle use special idle state parameters for C6 when
package C-states are disabled (Chen Yu).
- Rework the TEO (timer events oriented) cpuidle governor to address
some theoretical shortcomings in it (Rafael Wysocki).
- Drop unneeded semicolon from the TEO governor (Wan Jiabing).
- Modify the runtime PM framework to accept unassigned suspend
and resume callback pointers (Ulf Hansson).
- Improve pm_runtime_get_sync() documentation (Krzysztof Kozlowski).
- Improve device performance states support in the generic power
domains (genpd) framework (Ulf Hansson).
- Fix some documentation issues in genpd (Yang Yingliang).
- Make the operating performance points (OPP) framework use the
required-opps DT property in use cases that are not related to
genpd (Hsin-Yi Wang).
- Make lazy_link_required_opp_table() use list_del_init instead of
list_del/INIT_LIST_HEAD (Yang Yingliang).
- Simplify wake IRQs handling in the core system-wide sleep support
code and clean up some coding style inconsistencies in it (Tian
Tao, Zhen Lei).
- Add cooling support to the tegra30 devfreq driver and improve its
DT bindings (Dmitry Osipenko).
- Fix some assorted issues in the devfreq core and drivers (Chanwoo
Choi, Dong Aisheng, YueHaibing).
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Merge tag 'pm-5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management updates from Rafael Wysocki:
"These add hybrid processors support to the intel_pstate driver and
make it work with more processor models when HWP is disabled, make the
intel_idle driver use special C6 idle state paremeters when package
C-states are disabled, add cooling support to the tegra30 devfreq
driver, rework the TEO (timer events oriented) cpuidle governor,
extend the OPP (operating performance points) framework to use the
required-opps DT property in more cases, fix some issues and clean up
a number of assorted pieces of code.
Specifics:
- Make intel_pstate support hybrid processors using abstract
performance units in the HWP interface (Rafael Wysocki).
- Add Icelake servers and Cometlake support in no-HWP mode to
intel_pstate (Giovanni Gherdovich).
- Make cpufreq_online() error path be consistent with the CPU device
removal path in cpufreq (Rafael Wysocki).
- Clean up 3 cpufreq drivers and the statistics code (Hailong Liu,
Randy Dunlap, Shaokun Zhang).
- Make intel_idle use special idle state parameters for C6 when
package C-states are disabled (Chen Yu).
- Rework the TEO (timer events oriented) cpuidle governor to address
some theoretical shortcomings in it (Rafael Wysocki).
- Drop unneeded semicolon from the TEO governor (Wan Jiabing).
- Modify the runtime PM framework to accept unassigned suspend and
resume callback pointers (Ulf Hansson).
- Improve pm_runtime_get_sync() documentation (Krzysztof Kozlowski).
- Improve device performance states support in the generic power
domains (genpd) framework (Ulf Hansson).
- Fix some documentation issues in genpd (Yang Yingliang).
- Make the operating performance points (OPP) framework use the
required-opps DT property in use cases that are not related to
genpd (Hsin-Yi Wang).
- Make lazy_link_required_opp_table() use list_del_init instead of
list_del/INIT_LIST_HEAD (Yang Yingliang).
- Simplify wake IRQs handling in the core system-wide sleep support
code and clean up some coding style inconsistencies in it (Tian
Tao, Zhen Lei).
- Add cooling support to the tegra30 devfreq driver and improve its
DT bindings (Dmitry Osipenko).
- Fix some assorted issues in the devfreq core and drivers (Chanwoo
Choi, Dong Aisheng, YueHaibing)"
* tag 'pm-5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (39 commits)
PM / devfreq: passive: Fix get_target_freq when not using required-opp
cpufreq: Make cpufreq_online() call driver->offline() on errors
opp: Allow required-opps to be used for non genpd use cases
cpuidle: teo: remove unneeded semicolon in teo_select()
dt-bindings: devfreq: tegra30-actmon: Add cooling-cells
dt-bindings: devfreq: tegra30-actmon: Convert to schema
PM / devfreq: userspace: Use DEVICE_ATTR_RW macro
PM: runtime: Clarify documentation when callbacks are unassigned
PM: runtime: Allow unassigned ->runtime_suspend|resume callbacks
PM: runtime: Improve path in rpm_idle() when no callback
PM: hibernate: remove leading spaces before tabs
PM: sleep: remove trailing spaces and tabs
PM: domains: Drop/restore performance state votes for devices at runtime PM
PM: domains: Return early if perf state is already set for the device
PM: domains: Split code in dev_pm_genpd_set_performance_state()
cpuidle: teo: Use kerneldoc documentation in admin-guide
cpuidle: teo: Rework most recent idle duration values treatment
cpuidle: teo: Change the main idle state selection logic
cpuidle: teo: Cosmetic modification of teo_select()
cpuidle: teo: Cosmetic modifications of teo_update()
...
|
||
|
Linus Torvalds
|
a941a0349c |
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Merge tag 'timers-core-2021-06-29' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer updates from Thomas Gleixner:
"Time and clocksource/clockevent related updates:
Core changes:
- Infrastructure to support per CPU "broadcast" devices for per CPU
clockevent devices which stop in deep idle states. This allows us
to utilize the more efficient architected timer on certain ARM SoCs
for normal operation instead of permanentely using the slow to
access SoC specific clockevent device.
- Print the name of the broadcast/wakeup device in /proc/timer_list
- Make the clocksource watchdog more robust against delays between
reading the current active clocksource and the watchdog
clocksource. Such delays can be caused by NMIs, SMIs and vCPU
preemption.
Handle this by reading the watchdog clocksource twice, i.e. before
and after reading the current active clocksource. In case that the
two watchdog reads shows an excessive time delta, the read sequence
is repeated up to 3 times.
- Improve the debug output and add a test module for the watchdog
mechanism.
- Reimplementation of the venerable time64_to_tm() function with a
faster and significantly smaller version. Straight from the source,
i.e. the author of the related research paper contributed this!
Driver changes:
- No new drivers, not even new device tree bindings!
- Fixes, improvements and cleanups and all over the place"
* tag 'timers-core-2021-06-29' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (30 commits)
time/kunit: Add missing MODULE_LICENSE()
time: Improve performance of time64_to_tm()
clockevents: Use list_move() instead of list_del()/list_add()
clocksource: Print deviation in nanoseconds when a clocksource becomes unstable
clocksource: Provide kernel module to test clocksource watchdog
clocksource: Reduce clocksource-skew threshold
clocksource: Limit number of CPUs checked for clock synchronization
clocksource: Check per-CPU clock synchronization when marked unstable
clocksource: Retry clock read if long delays detected
clockevents: Add missing parameter documentation
clocksource/drivers/timer-ti-dm: Drop unnecessary restore
clocksource/arm_arch_timer: Improve Allwinner A64 timer workaround
clocksource/drivers/arm_global_timer: Remove duplicated argument in arm_global_timer
clocksource/drivers/arm_global_timer: Make symbol 'gt_clk_rate_change_nb' static
arm: zynq: don't disable CONFIG_ARM_GLOBAL_TIMER due to CONFIG_CPU_FREQ anymore
clocksource/drivers/arm_global_timer: Implement rate compensation whenever source clock changes
clocksource/drivers/ingenic: Rename unreasonable array names
clocksource/drivers/timer-ti-dm: Save and restore timer TIOCP_CFG
clocksource/drivers/mediatek: Ack and disable interrupts on suspend
clocksource/drivers/samsung_pwm: Constify source IO memory
...
|
||
|
Mike Rapoport
|
48d9f3355a |
docs: remove description of DISCONTIGMEM
Remove description of DISCONTIGMEM from the "Memory Models" document and update VM sysctl description so that it won't mention DISCONIGMEM. Link: https://lkml.kernel.org/r/20210608091316.3622-8-rppt@kernel.org Signed-off-by: Mike Rapoport <rppt@linux.ibm.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: David Hildenbrand <david@redhat.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Matt Turner <mattst88@gmail.com> Cc: Richard Henderson <rth@twiddle.net> Cc: Vineet Gupta <vgupta@synopsys.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
||
|
Mel Gorman
|
74f4482209 |
mm/page_alloc: introduce vm.percpu_pagelist_high_fraction
This introduces a new sysctl vm.percpu_pagelist_high_fraction. It is
similar to the old vm.percpu_pagelist_fraction. The old sysctl increased
both pcp->batch and pcp->high with the higher pcp->high potentially
reducing zone->lock contention. However, the higher pcp->batch value also
potentially increased allocation latency while the PCP was refilled. This
sysctl only adjusts pcp->high so that zone->lock contention is potentially
reduced but allocation latency during a PCP refill remains the same.
# grep -E "high:|batch" /proc/zoneinfo | tail -2
high: 649
batch: 63
# sysctl vm.percpu_pagelist_high_fraction=8
# grep -E "high:|batch" /proc/zoneinfo | tail -2
high: 35071
batch: 63
# sysctl vm.percpu_pagelist_high_fraction=64
high: 4383
batch: 63
# sysctl vm.percpu_pagelist_high_fraction=0
high: 649
batch: 63
[mgorman@techsingularity.net: fix documentation]
Link: https://lkml.kernel.org/r/20210528151010.GQ30378@techsingularity.net
Link: https://lkml.kernel.org/r/20210525080119.5455-7-mgorman@techsingularity.net
Signed-off-by: Mel Gorman <mgorman@techsingularity.net>
Acked-by: Dave Hansen <dave.hansen@linux.intel.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Hillf Danton <hdanton@sina.com>
Cc: Michal Hocko <mhocko@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
||
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Mel Gorman
|
bbbecb35a4 |
mm/page_alloc: delete vm.percpu_pagelist_fraction
Patch series "Calculate pcp->high based on zone sizes and active CPUs", v2. The per-cpu page allocator (PCP) is meant to reduce contention on the zone lock but the sizing of batch and high is archaic and neither takes the zone size into account or the number of CPUs local to a zone. With larger zones and more CPUs per node, the contention is getting worse. Furthermore, the fact that vm.percpu_pagelist_fraction adjusts both batch and high values means that the sysctl can reduce zone lock contention but also increase allocation latencies. This series disassociates pcp->high from pcp->batch and then scales pcp->high based on the size of the local zone with limited impact to reclaim and accounting for active CPUs but leaves pcp->batch static. It also adapts the number of pages that can be on the pcp list based on recent freeing patterns. The motivation is partially to adjust to larger memory sizes but is also driven by the fact that large batches of page freeing via release_pages() often shows zone contention as a major part of the problem. Another is a bug report based on an older kernel where a multi-terabyte process can takes several minutes to exit. A workaround was to use vm.percpu_pagelist_fraction to increase the pcp->high value but testing indicated that a production workload could not use the same values because of an increase in allocation latencies. Unfortunately, I cannot reproduce this test case myself as the multi-terabyte machines are in active use but it should alleviate the problem. The series aims to address both and partially acts as a pre-requisite. pcp only works with order-0 which is useless for SLUB (when using high orders) and THP (unconditionally). To store high-order pages on PCP, the pcp->high values need to be increased first. This patch (of 6): The vm.percpu_pagelist_fraction is used to increase the batch and high limits for the per-cpu page allocator (PCP). The intent behind the sysctl is to reduce zone lock acquisition when allocating/freeing pages but it has a problem. While it can decrease contention, it can also increase latency on the allocation side due to unreasonably large batch sizes. This leads to games where an administrator adjusts percpu_pagelist_fraction on the fly to work around contention and allocation latency problems. This series aims to alleviate the problems with zone lock contention while avoiding the allocation-side latency problems. For the purposes of review, it's easier to remove this sysctl now and reintroduce a similar sysctl later in the series that deals only with pcp->high. Link: https://lkml.kernel.org/r/20210525080119.5455-1-mgorman@techsingularity.net Link: https://lkml.kernel.org/r/20210525080119.5455-2-mgorman@techsingularity.net Signed-off-by: Mel Gorman <mgorman@techsingularity.net> Acked-by: Dave Hansen <dave.hansen@linux.intel.com> Acked-by: Vlastimil Babka <vbabka@suse.cz> Cc: Hillf Danton <hdanton@sina.com> Cc: Michal Hocko <mhocko@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
||
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Gavin Shan
|
f58780a8e3 |
mm/page_reporting: export reporting order as module parameter
The macro PAGE_REPORTING_MIN_ORDER is defined as the page reporting threshold. It can't be adjusted at runtime. This introduces a variable (@page_reporting_order) to replace the marcro (PAGE_REPORTING_MIN_ORDER). MAX_ORDER is assigned to it initially, meaning the page reporting is disabled. It will be specified by driver if valid one is provided. Otherwise, it will fall back to @pageblock_order. It's also exported so that the page reporting order can be adjusted at runtime. Link: https://lkml.kernel.org/r/20210625014710.42954-3-gshan@redhat.com Signed-off-by: Gavin Shan <gshan@redhat.com> Suggested-by: David Hildenbrand <david@redhat.com> Reviewed-by: Alexander Duyck <alexanderduyck@fb.com> Cc: Anshuman Khandual <anshuman.khandual@arm.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: "Michael S. Tsirkin" <mst@redhat.com> Cc: Will Deacon <will@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
||
|
Wang Qing
|
256f7a6791 |
doc: watchdog: modify the doc related to "watchdog/%u"
"watchdog/%u" threads has be replaced by cpu_stop_work. The current description is extremely misleading. Link: https://lkml.kernel.org/r/1619687073-24686-5-git-send-email-wangqing@vivo.com Signed-off-by: Wang Qing <wangqing@vivo.com> Reviewed-by: Petr Mladek <pmladek@suse.com> Cc: "Guilherme G. Piccoli" <gpiccoli@canonical.com> Cc: Joe Perches <joe@perches.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Kees Cook <keescook@chromium.org> Cc: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Cc: Qais Yousef <qais.yousef@arm.com> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: Santosh Sivaraj <santosh@fossix.org> Cc: Stephen Kitt <steve@sk2.org> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
||
|
Wang Qing
|
e55fda8cdc |
doc: watchdog: modify the explanation related to watchdog thread
"watchdog/%u" threads has be replaced by cpu_stop_work. The current description is extremely misleading. Link: https://lkml.kernel.org/r/1619687073-24686-4-git-send-email-wangqing@vivo.com Signed-off-by: Wang Qing <wangqing@vivo.com> Reviewed-by: Petr Mladek <pmladek@suse.com> Cc: "Guilherme G. Piccoli" <gpiccoli@canonical.com> Cc: Joe Perches <joe@perches.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Kees Cook <keescook@chromium.org> Cc: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Cc: Qais Yousef <qais.yousef@arm.com> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: Santosh Sivaraj <santosh@fossix.org> Cc: Stephen Kitt <steve@sk2.org> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
||
|
Rafael J. Wysocki
|
ed562d280c |
Merge branches 'pm-cpufreq' and 'pm-cpuidle'
* pm-cpufreq: cpufreq: Make cpufreq_online() call driver->offline() on errors cpufreq: loongson2: Remove unused linux/sched.h headers cpufreq: sh: Remove unused linux/sched.h headers cpufreq: stats: Clean up local variable in cpufreq_stats_create_table() cpufreq: intel_pstate: hybrid: Fix build with CONFIG_ACPI unset cpufreq: sc520_freq: add 'fallthrough' to one case cpufreq: intel_pstate: Add Cometlake support in no-HWP mode cpufreq: intel_pstate: Add Icelake servers support in no-HWP mode cpufreq: intel_pstate: hybrid: CPU-specific scaling factor cpufreq: intel_pstate: hybrid: Avoid exposing two global attributes * pm-cpuidle: cpuidle: teo: remove unneeded semicolon in teo_select() cpuidle: teo: Use kerneldoc documentation in admin-guide cpuidle: teo: Rework most recent idle duration values treatment cpuidle: teo: Change the main idle state selection logic cpuidle: teo: Cosmetic modification of teo_select() cpuidle: teo: Cosmetic modifications of teo_update() intel_idle: Adjust the SKX C6 parameters if PC6 is disabled |
||
|
Linus Torvalds
|
07bdc0746a |
pstore updates for v5.14-rc1
Use normal block device I/O path for pstore/blk. (Christoph Hellwig, Kees Cook, Pu Lehui) -----BEGIN PGP SIGNATURE----- iQJKBAABCgA0FiEEpcP2jyKd1g9yPm4TiXL039xtwCYFAmDaKjAWHGtlZXNjb29r QGNocm9taXVtLm9yZwAKCRCJcvTf3G3AJj5HEACHiIyjZoWDGtpdaV/GumREeKoH UaeqCDZHNjC0AsMGSPuyifAvUHplFH9LPEHsQuvob9kSyuns2ZMDzEeWVIQzDSYI yFAaxjqP+H9mwR0QLWZFyOv/RySPahMX8cQJyRe9mt3rBWMrK/dVI51GOG69qad7 Eb1Z4GCXz05EToWdqUK5DHlTNirbZdyAfeqdWR9Ir4zrK47SFLe4SDf7mzoySCXc 8U2yAJkaSQGwX+aVh0pgPM+nkYmf26O4iqW+G3blTKap4nxwefUJHxtYkSaiBQPH rqNVo9hnk4LnXxJQudPmuVWMahK4OszeSpApmcok3jCZ5+/2ZPPxFYiLE4kGquTh ulMVlECDMcc3WC7+HLYmbbg78l1K4fTTdSlcg9uXN0c6M4X+0WgLvifCJyVADQkF twwGu06bszqCjbg+dCrabI/e/nDltcc6/T9jVFYmEwckVu0OVP9Y8DndELxngqi1 NTm+h7ArCQQtO+vm7Eeg08fqZBj4jGCXLGyPB0qI/k+YMbhq3YrGX4uoajpFUz5s 2k1M/JwOhqPPUiZJqGCxXKkXKDbrmiE2aLRoiSsSwlxL/8bqCCaXi0sc58pWUGci 93RWEWF6fZnfD4oLnzmWrQpYJHpzckoqzn8DmPQx9ztRjixN3RX/fcpyRdaaYPq9 btlK81xRoPVyqmH+7A== =ul9O -----END PGP SIGNATURE----- Merge tag 'pstore-v5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux Pull pstore updates from Kees Cook: "Use normal block device I/O path for pstore/blk. (Christoph Hellwig, Kees Cook, Pu Lehui)" * tag 'pstore-v5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: pstore/blk: Include zone in pstore_device_info pstore/blk: Fix kerndoc and redundancy on blkdev param pstore/blk: Use the normal block device I/O path pstore/blk: Move verify_size() macro out of function pstore/blk: Improve failure reporting |
||
|
Linus Torvalds
|
233a806b00 |
This was a reasonably active cycle for documentation; this pull includes:
- Some kernel-doc cleanups. That script is still regex onslaught from
hell, but it has gotten a little better.
- Improvements to the checkpatch docs, which are also used by the tool
itself.
- A major update to the pathname lookup documentation.
- Elimination of :doc: markup, since our automarkup magic can create
references from filenames without all the extra noise.
- The flurry of Chinese translation activity continues.
Plus, of course, the usual collection of updates, typo fixes, and warning
fixes.
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Merge tag 'docs-5.14' of git://git.lwn.net/linux
Pull documentation updates from Jonathan Corbet:
"This was a reasonably active cycle for documentation; this includes:
- Some kernel-doc cleanups. That script is still regex onslaught from
hell, but it has gotten a little better.
- Improvements to the checkpatch docs, which are also used by the
tool itself.
- A major update to the pathname lookup documentation.
- Elimination of :doc: markup, since our automarkup magic can create
references from filenames without all the extra noise.
- The flurry of Chinese translation activity continues.
Plus, of course, the usual collection of updates, typo fixes, and
warning fixes"
* tag 'docs-5.14' of git://git.lwn.net/linux: (115 commits)
docs: path-lookup: use bare function() rather than literals
docs: path-lookup: update symlink description
docs: path-lookup: update get_link() ->follow_link description
docs: path-lookup: update WALK_GET, WALK_PUT desc
docs: path-lookup: no get_link()
docs: path-lookup: update i_op->put_link and cookie description
docs: path-lookup: i_op->follow_link replaced with i_op->get_link
docs: path-lookup: Add macro name to symlink limit description
docs: path-lookup: remove filename_mountpoint
docs: path-lookup: update do_last() part
docs: path-lookup: update path_mountpoint() part
docs: path-lookup: update path_to_nameidata() part
docs: path-lookup: update follow_managed() part
docs: Makefile: Use CONFIG_SHELL not SHELL
docs: Take a little noise out of the build process
docs: x86: avoid using ReST :doc:`foo` markup
docs: virt: kvm: s390-pv-boot.rst: avoid using ReST :doc:`foo` markup
docs: userspace-api: landlock.rst: avoid using ReST :doc:`foo` markup
docs: trace: ftrace.rst: avoid using ReST :doc:`foo` markup
docs: trace: coresight: coresight.rst: avoid using ReST :doc:`foo` markup
...
|
||
|
Linus Torvalds
|
31e798fd6f |
media updates for v5.14-rc1
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||
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Mikulas Patocka
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5c0de3d72f |
dm writecache: make writeback pause configurable
Commit
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||
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Linus Torvalds
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1b1cf8fe99 |
Changes in this cycle were:
- Add the "ratelimit:N" parameter to the split_lock_detect= boot option,
to rate-limit the generation of bus-lock exceptions. This is both
easier on system resources and kinder to offending applications than
the current policy of outright killing them.
- Document the split-lock detection feature and its parameters.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'x86-splitlock-2021-06-28' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 splitlock updates from Ingo Molnar:
- Add the "ratelimit:N" parameter to the split_lock_detect= boot
option, to rate-limit the generation of bus-lock exceptions.
This is both easier on system resources and kinder to offending
applications than the current policy of outright killing them.
- Document the split-lock detection feature and its parameters.
* tag 'x86-splitlock-2021-06-28' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
Documentation/x86: Add ratelimit in buslock.rst
Documentation/admin-guide: Add bus lock ratelimit
x86/bus_lock: Set rate limit for bus lock
Documentation/x86: Add buslock.rst
|
||
|
Linus Torvalds
|
8e4d7a78f0 |
Misc cleanups & removal of obsolete code.
Signed-off-by: Ingo Molnar <mingo@kernel.org> -----BEGIN PGP SIGNATURE----- iQJFBAABCgAvFiEEBpT5eoXrXCwVQwEKEnMQ0APhK1gFAmDZejQRHG1pbmdvQGtl cm5lbC5vcmcACgkQEnMQ0APhK1hKCg//a0wiOyJBiWLAW0uiOucF2ICVQZj5rKgi M4HRJZ9jNkFUFVQ/eXYI7uedSqJ6B4hwoUqU6Yp6e05CF/Jgxe2OQXnknearjtDp xs8yBsnLolCrtHzWvuJAZL8InXwvUYrsxu1A8kWKd1ezZQ2V2aFEI4KtYcPVoBBi hRNMy1JVJbUoCG5s/CbsMpTKH0ehQFGsG46rCLQJ4s9H3rcYaCv9NY2q1EYKBrha ZiZjPSFBKaTAVEoc3tUbqsNZAqgyuwRcBQL0K5VDI9p92fudvKgsTI7erbmp+Lij mLhjjoPQK1C07kj0HpCPyoGMiTbJ2piag/jZnxSEiQnNxmZjqjRUhDuDhp6uc/SE 98CEYWPoVbU7N6QLEurHVRAfaQ/ZC7PfiR7lhkoJHizaszFY1NFRxplsU1rzTwGq YZdr+y49tJTCU1wIvWF2eFBZHBEgfA6fP4TRGgVsQ7r8IhugR1nCLcnTfMLYXt2t 9Fe57M7cBgZMgNf5AgvraowugJrTLX7240YPKxHnv5yLjIBt4bulm8X4Lq/MKgc+ UbRfB7Trd2c9T4EVDy26rQ7qk+VC8rIbzEp4kvlDpV8u7BtLYhVonxVz6qPong5b NxOczaFsfL5gWJmfGU+vfc+RFl2lNhQQMLo/gdEn89qZL8nxL/4byejwfCs0YfC2 wgDXNwRJb+g= =YqZp -----END PGP SIGNATURE----- Merge tag 'x86-cleanups-2021-06-28' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 cleanups from Ingo Molnar: "Misc cleanups & removal of obsolete code" * tag 'x86-cleanups-2021-06-28' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/sgx: Correct kernel-doc's arg name in sgx_encl_release() doc: Remove references to IBM Calgary x86/setup: Document that Windows reserves the first MiB x86/crash: Remove crash_reserve_low_1M() x86/setup: Remove CONFIG_X86_RESERVE_LOW and reservelow= options x86/alternative: Align insn bytes vertically x86: Fix leftover comment typos x86/asm: Simplify __smp_mb() definition x86/alternatives: Make the x86nops[] symbol static |
||
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Mikulas Patocka
|
611c3e168b |
dm writecache: add optional "metadata_only" parameter
Add a "metadata_only" parameter that when present: only metadata is promoted to the cache. This option improves performance for heavier REQ_META workloads (e.g. device-mapper-test-suite's "git clone and checkout" benchmark improves from 341s to 312s). Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com> |
||
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Mike Snitzer
|
cd039afa0a |
dm writecache: add "cleaner" and "max_age" to Documentation
Backfill missing Documentation. Fixes: |
||
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Joerg Roedel
|
2b9d8e3e9a | Merge branches 'iommu/fixes', 'arm/rockchip', 'arm/smmu', 'x86/vt-d', 'x86/amd', 'virtio' and 'core' into next | ||
|
Paul E. McKenney
|
1253b9b87e |
clocksource: Provide kernel module to test clocksource watchdog
When the clocksource watchdog marks a clock as unstable, this might be due to that clock being unstable or it might be due to delays that happen to occur between the reads of the two clocks. It would be good to have a way of testing the clocksource watchdog's ability to distinguish between these two causes of clock skew and instability. Therefore, provide a new clocksource-wdtest module selected by a new TEST_CLOCKSOURCE_WATCHDOG Kconfig option. This module has a single module parameter named "holdoff" that provides the number of seconds of delay before testing should start, which defaults to zero when built as a module and to 10 seconds when built directly into the kernel. Very large systems that boot slowly may need to increase the value of this module parameter. This module uses hand-crafted clocksource structures to do its testing, thus avoiding messing up timing for the rest of the kernel and for user applications. This module first verifies that the ->uncertainty_margin field of the clocksource structures are set sanely. It then tests the delay-detection capability of the clocksource watchdog, increasing the number of consecutive delays injected, first provoking console messages complaining about the delays and finally forcing a clock-skew event. Unexpected test results cause at least one WARN_ON_ONCE() console splat. If there are no splats, the test has passed. Finally, it fuzzes the value returned from a clocksource to test the clocksource watchdog's ability to detect time skew. This module checks the state of its clocksource after each test, and uses WARN_ON_ONCE() to emit a console splat if there are any failures. This should enable all types of test frameworks to detect any such failures. This facility is intended for diagnostic use only, and should be avoided on production systems. Reported-by: Chris Mason <clm@fb.com> Suggested-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Paul E. McKenney <paulmck@kernel.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Tested-by: Feng Tang <feng.tang@intel.com> Link: https://lore.kernel.org/r/20210527190124.440372-5-paulmck@kernel.org |
||
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Paul E. McKenney
|
fa218f1cce |
clocksource: Limit number of CPUs checked for clock synchronization
Currently, if skew is detected on a clock marked CLOCK_SOURCE_VERIFY_PERCPU, that clock is checked on all CPUs. This is thorough, but might not be what you want on a system with a few tens of CPUs, let alone a few hundred of them. Therefore, by default check only up to eight randomly chosen CPUs. Also provide a new clocksource.verify_n_cpus kernel boot parameter. A value of -1 says to check all of the CPUs, and a non-negative value says to randomly select that number of CPUs, without concern about selecting the same CPU multiple times. However, make use of a cpumask so that a given CPU will be checked at most once. Suggested-by: Thomas Gleixner <tglx@linutronix.de> # For verify_n_cpus=1. Signed-off-by: Paul E. McKenney <paulmck@kernel.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Feng Tang <feng.tang@intel.com> Link: https://lore.kernel.org/r/20210527190124.440372-3-paulmck@kernel.org |
||
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Paul E. McKenney
|
db3a34e174 |
clocksource: Retry clock read if long delays detected
When the clocksource watchdog marks a clock as unstable, this might be due to that clock being unstable or it might be due to delays that happen to occur between the reads of the two clocks. Yes, interrupts are disabled across those two reads, but there are no shortage of things that can delay interrupts-disabled regions of code ranging from SMI handlers to vCPU preemption. It would be good to have some indication as to why the clock was marked unstable. Therefore, re-read the watchdog clock on either side of the read from the clock under test. If the watchdog clock shows an excessive time delta between its pair of reads, the reads are retried. The maximum number of retries is specified by a new kernel boot parameter clocksource.max_cswd_read_retries, which defaults to three, that is, up to four reads, one initial and up to three retries. If more than one retry was required, a message is printed on the console (the occasional single retry is expected behavior, especially in guest OSes). If the maximum number of retries is exceeded, the clock under test will be marked unstable. However, the probability of this happening due to various sorts of delays is quite small. In addition, the reason (clock-read delays) for the unstable marking will be apparent. Reported-by: Chris Mason <clm@fb.com> Signed-off-by: Paul E. McKenney <paulmck@kernel.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Feng Tang <feng.tang@intel.com> Link: https://lore.kernel.org/r/20210527190124.440372-1-paulmck@kernel.org |
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Bart Van Assche
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556910e392 |
block: Introduce the ioprio rq-qos policy
Introduce an rq-qos policy that assigns an I/O priority to requests based on blk-cgroup configuration settings. This policy has the following advantages over the ioprio_set() system call: - This policy is cgroup based so it has all the advantages of cgroups. - While ioprio_set() does not affect page cache writeback I/O, this rq-qos controller affects page cache writeback I/O for filesystems that support assiociating a cgroup with writeback I/O. See also Documentation/admin-guide/cgroup-v2.rst. Cc: Damien Le Moal <damien.lemoal@wdc.com> Cc: Hannes Reinecke <hare@suse.de> Cc: Christoph Hellwig <hch@lst.de> Cc: Ming Lei <ming.lei@redhat.com> Cc: Johannes Thumshirn <johannes.thumshirn@wdc.com> Cc: Himanshu Madhani <himanshu.madhani@oracle.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Link: https://lore.kernel.org/r/20210618004456.7280-5-bvanassche@acm.org Signed-off-by: Jens Axboe <axboe@kernel.dk> |
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Rafael J. Wysocki
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6cbab787c8 | Merge back cpufreq material for v5.14. | ||
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Mauro Carvalho Chehab
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2793e19d63 |
docs: admin-guide: sysctl: avoid using ReST :doc:foo markup
The :doc:`foo` tag is auto-generated via automarkup.py. So, use the filename at the sources, instead of :doc:`foo`. Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Link: https://lore.kernel.org/r/12abd2290c7ebc05c89178d2556bea740bd70fac.1623824363.git.mchehab+huawei@kernel.org Signed-off-by: Jonathan Corbet <corbet@lwn.net> |
||
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Mauro Carvalho Chehab
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e499f4c297 |
docs: admin-guide: hw-vuln: avoid using ReST :doc:foo markup
The :doc:`foo` tag is auto-generated via automarkup.py. So, use the filename at the sources, instead of :doc:`foo`. Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Link: https://lore.kernel.org/r/4e378517761f3df07165d5ecdac5a0a81577e68f.1623824363.git.mchehab+huawei@kernel.org Signed-off-by: Jonathan Corbet <corbet@lwn.net> |
||
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Mauro Carvalho Chehab
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17420f3138 |
docs: admin-guide: pm: avoid using ReST :doc:foo markup
The :doc:`foo` tag is auto-generated via automarkup.py. So, use the filename at the sources, instead of :doc:`foo`. Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Link: https://lore.kernel.org/r/04616d9fc0b4a0d33486fa0018631a2db2eba860.1623824363.git.mchehab+huawei@kernel.org Signed-off-by: Jonathan Corbet <corbet@lwn.net> |
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Mauro Carvalho Chehab
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349660e944 |
docs: admin-guide: reporting-issues.rst: replace some characters
The conversion tools used during DocBook/LaTeX/html/Markdown->ReST
conversion and some cut-and-pasted text contain some characters that
aren't easily reachable on standard keyboards and/or could cause
troubles when parsed by the documentation build system.
Replace the occurences of the following characters:
- U+00a0 (' '): NO-BREAK SPACE
as it can cause lines being truncated on PDF output
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Link: https://lore.kernel.org/r/551a2af0e654226067e5c376d3e2d959cc738f39.1623826294.git.mchehab+huawei@kernel.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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Andy Shevchenko
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d3121e64ad |
ACPI: sysfs: Allow bitmap list to be supplied to acpi_mask_gpe
Currently we need to use as many acpi_mask_gpe options as we want to have GPEs to be masked. Even with two it already becomes inconveniently large the kernel command line. Instead, allow acpi_mask_gpe to represent bitmap list. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
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Robin Murphy
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531353e650 |
iommu: Update "iommu.strict" documentation
Consolidating the flush queue logic also meant that the "iommu.strict"
option started taking effect on x86 as well. Make sure we document that.
Fixes:
|
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Steven Rostedt (VMware)
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f38601368f |
tracing: Add tp_printk_stop_on_boot option
Add a kernel command line option that disables printing of events to console at late_initcall_sync(). This is useful when needing to see specific events written to console on boot up, but not wanting it when user space starts, as user space may make the console so noisy that the system becomes inoperable. Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> |
||
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Kir Kolyshkin
|
828615950b |
docs/cgroup-v1/blkio: update for 5.x kernels
Commit bf382fb0bcef4 ("block: remove legacy IO schedulers", Oct 12 2018)
removes the CFQ scheduler, together with blkio.weight and
blkio.weight_device described in cgroup v1 documentation. Users are
supposed to use the BFQ scheduler, which cgroup file for setting weight
is blkio.bfq.weight, but there is no way to set per-device weight.
Later, commit
|
||
|
Kir Kolyshkin
|
37fe403898 |
docs/cgroup-v1/blkio: stop abusing itemized list
Fix many formatting issues by stop (ab)using itemized lists for everything (mostly replaced by definition lists). Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com> Signed-off-by: Jens Axboe <axboe@kernel.dk> |
||
|
Kees Cook
|
c811659bb9 |
pstore/blk: Fix kerndoc and redundancy on blkdev param
Remove redundant details of blkdev and fix up resulting kerndoc. Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Kees Cook <keescook@chromium.org> |
||
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Kees Cook
|
7bb9557b48 |
pstore/blk: Use the normal block device I/O path
Stop poking into block layer internals and just open the block device file an use kernel_read and kernel_write on it. Note that this means the transformation from name_to_dev_t can't be used anymore when pstore_blk is loaded as a module: a full filesystem device path name must be used instead. Additionally removes ":internal:" kerndoc link, since no such documentation remains. Co-developed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Kees Cook <keescook@chromium.org> |
||
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Mauro Carvalho Chehab
|
6ef43d273e |
media: admin-guide: avoid using ReST :doc:foo markup
The :doc:`foo` tag is auto-generated via automarkup.py. So, use the filename at the sources, instead of :doc:`foo`. Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> |
||
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Mauro Carvalho Chehab
|
703ac06a88 |
media: docs: */media/index.rst: don't use ReST doc:foo
The :doc:`foo` tag is auto-generated via automarkup.py.
So, use the filename at the sources, instead of :doc:`foo`.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
|
||
|
Tian Tao
|
05a463ec1b |
docs: cputopology: move the sysfs ABI description to right place
Documentation/admin-guide/cputopology.rst is the wrong place to describe sysfs ABI. So move the cputopology ABI things to Documentation/ABI/stable/sysfs-devices-system-cpu and add a reference to ABI doc in Documentation/admin-guide/cputopology.rst. Link: https://lkml.kernel.org/r/20210319041618.14316-1-song.bao.hua@hisilicon.com Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Tian Tao <tiantao6@hisilicon.com> Signed-off-by: Barry Song <song.bao.hua@hisilicon.com> Link: https://lore.kernel.org/r/20210611052249.25776-1-song.bao.hua@hisilicon.com Signed-off-by: Jonathan Corbet <corbet@lwn.net> |
||
|
Baoquan He
|
b1f4c36366 |
Documentation: kdump: update kdump guide
Some parts of the guide are aged, hence need be updated. 1) The backup area of the 1st 640K on X86_64 has been removed by below commits, update the description accordingly. commit |
||
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Kir Kolyshkin
|
a9edc03f13 |
docs: fix a cross-ref
Commit
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Rafael J. Wysocki
|
154ae8bb3c |
cpuidle: teo: Use kerneldoc documentation in admin-guide
There are two descriptions of the TEO (Timer Events Oriented) cpuidle governor in the kernel source tree, one in the C file containing its code and one in cpuidle.rst which is part of admin-guide. Instead of trying to keep them both in sync and in order to reduce text duplication, include the governor description from the C file directly into cpuidle.rst. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
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Masami Hiramatsu
|
0ff2bb7d42 |
docs: bootconfig: Update for mixing value and subkeys
Update document for the mixing value and subkeys on a key. Link: https://lkml.kernel.org/r/162262196510.264090.15044943496205914148.stgit@devnote2 Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> |
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Joel Fernandes (Google)
|
0159bb020c |
Documentation: Add usecases, design and interface for core scheduling
Now that core scheduling is merged, update the documentation. Co-developed-by: Chris Hyser <chris.hyser@oracle.com> Signed-off-by: Chris Hyser <chris.hyser@oracle.com> Co-developed-by: Josh Don <joshdon@google.com> Signed-off-by: Josh Don <joshdon@google.com> Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/20210603013136.370918-1-joel@joelfernandes.org |
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Suren Baghdasaryan
|
3958e2d0c3 |
cgroup: make per-cgroup pressure stall tracking configurable
PSI accounts stalls for each cgroup separately and aggregates it at each level of the hierarchy. This causes additional overhead with psi_avgs_work being called for each cgroup in the hierarchy. psi_avgs_work has been highly optimized, however on systems with large number of cgroups the overhead becomes noticeable. Systems which use PSI only at the system level could avoid this overhead if PSI can be configured to skip per-cgroup stall accounting. Add "cgroup_disable=pressure" kernel command-line option to allow requesting system-wide only pressure stall accounting. When set, it keeps system-wide accounting under /proc/pressure/ but skips accounting for individual cgroups and does not expose PSI nodes in cgroup hierarchy. Signed-off-by: Suren Baghdasaryan <surenb@google.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by: Tejun Heo <tj@kernel.org> |
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|
Mike Rapoport
|
1a6a9044b9 |
x86/setup: Remove CONFIG_X86_RESERVE_LOW and reservelow= options
The CONFIG_X86_RESERVE_LOW build time and reservelow= command line option allowed to control the amount of memory under 1M that would be reserved at boot to avoid using memory that can be potentially clobbered by BIOS. Since the entire range under 1M is always reserved there is no need for these options anymore and they can be removed. Signed-off-by: Mike Rapoport <rppt@linux.ibm.com> Signed-off-by: Borislav Petkov <bp@suse.de> Link: https://lkml.kernel.org/r/20210601075354.5149-3-rppt@kernel.org |
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|
Joerg Roedel
|
b1e650db2c |
iommu/amd: Add amd_iommu=force_enable option
Add this option to enable the IOMMU on platforms like AMD Stoney, where the kernel usually disables it because it may cause problems in some scenarios. Signed-off-by: Joerg Roedel <jroedel@suse.de> Acked-by: Alex Deucher <alexander.deucher@amd.com> Link: https://lore.kernel.org/r/20210603130203.29016-1-joro@8bytes.org |
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|
Ingo Molnar
|
a9e906b71f |
Merge branch 'sched/urgent' into sched/core, to pick up fixes
Signed-off-by: Ingo Molnar <mingo@kernel.org> |
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Mauro Carvalho Chehab
|
98b9c7890b |
docs: admin-guide: media: ipu3.rst: replace some characters
The conversion tools used during DocBook/LaTeX/html/Markdown->ReST
conversion and some cut-and-pasted text contain some characters that
aren't easily reachable on standard keyboards and/or could cause
troubles when parsed by the documentation build system.
Replace the occurences of the following characters:
- U+201c ('“'): LEFT DOUBLE QUOTATION MARK
- U+201d ('”'): RIGHT DOUBLE QUOTATION MARK
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
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||
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Sakari Ailus
|
dc794d3d24 |
media: staging: ipu3-imgu: Move the UAPI header from include under include/uapi
The header defines the user space interface but may be mistaken as kernel-only header due to its location. Add "uapi" directory under driver's include directory and move the header there. Suggested-by: Greg KH <gregkh@linuxfoundation.org> Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Reviewed-by: Bingbu Cao <bingbu.cao@intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> |
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|
Rajmohan Mani
|
3fb10ea4ce |
thunderbolt: Add support for retimer NVM upgrade when there is no link
With help from platform firmware (ACPI) it is possible to power on retimers even when there is no USB4 link (e.g nothing is connected to the USB4 ports). This allows us to bring the USB4 sideband up so that we can access retimers and upgrade their NVM firmware. If the platform has support for this, we expose two additional attributes under USB4 ports: offline and rescan. These can be used to bring the port offline, rescan for the retimers and put the port online again. The retimer NVM upgrade itself works the same way than with cable connected. Signed-off-by: Rajmohan Mani <rajmohan.mani@intel.com> Co-developed-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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|
Greg Kroah-Hartman
|
910cc95373 |
Merge 5.13-rc4 into tty-next
We need the tty/serial fixes in here as well. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
||
|
Barry Song
|
544ef682c6 |
docs: kernel-parameters: mark numa=off is supported by a bundle of architectures
risc-v and arm64 support numa=off by common arch_numa_init() in drivers/base/arch_numa.c. x86, ppc, mips, sparc support it by arch-level early_param. numa=off is widely used in linux distributions. it is better to document it. Signed-off-by: Barry Song <song.bao.hua@hisilicon.com> Link: https://lore.kernel.org/r/20210524051715.13604-1-song.bao.hua@hisilicon.com Signed-off-by: Jonathan Corbet <corbet@lwn.net> |
||
|
Linus Torvalds
|
d7c5303fbc |
Networking fixes for 5.13-rc4, including fixes from bpf, netfilter,
can and wireless trees. Notably including fixes for the recently
announced "FragAttacks" WiFi vulnerabilities. Rather large batch,
touching some core parts of the stack, too, but nothing hair-raising.
Current release - regressions:
- tipc: make node link identity publish thread safe
- dsa: felix: re-enable TAS guard band mode
- stmmac: correct clocks enabled in stmmac_vlan_rx_kill_vid()
- stmmac: fix system hang if change mac address after interface ifdown
Current release - new code bugs:
- mptcp: avoid OOB access in setsockopt()
- bpf: Fix nested bpf_bprintf_prepare with more per-cpu buffers
- ethtool: stats: fix a copy-paste error - init correct array size
Previous releases - regressions:
- sched: fix packet stuck problem for lockless qdisc
- net: really orphan skbs tied to closing sk
- mlx4: fix EEPROM dump support
- bpf: fix alu32 const subreg bound tracking on bitwise operations
- bpf: fix mask direction swap upon off reg sign change
- bpf, offload: reorder offload callback 'prepare' in verifier
- stmmac: Fix MAC WoL not working if PHY does not support WoL
- packetmmap: fix only tx timestamp on request
- tipc: skb_linearize the head skb when reassembling msgs
Previous releases - always broken:
- mac80211: address recent "FragAttacks" vulnerabilities
- mac80211: do not accept/forward invalid EAPOL frames
- mptcp: avoid potential error message floods
- bpf, ringbuf: deny reserve of buffers larger than ringbuf to prevent
out of buffer writes
- bpf: forbid trampoline attach for functions with variable arguments
- bpf: add deny list of functions to prevent inf recursion of tracing
programs
- tls splice: check SPLICE_F_NONBLOCK instead of MSG_DONTWAIT
- can: isotp: prevent race between isotp_bind() and isotp_setsockopt()
- netfilter: nft_set_pipapo_avx2: Add irq_fpu_usable() check,
fallback to non-AVX2 version
Misc:
- bpf: add kconfig knob for disabling unpriv bpf by default
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Merge tag 'net-5.13-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Pull networking fixes from Jakub Kicinski:
"Networking fixes for 5.13-rc4, including fixes from bpf, netfilter,
can and wireless trees. Notably including fixes for the recently
announced "FragAttacks" WiFi vulnerabilities. Rather large batch,
touching some core parts of the stack, too, but nothing hair-raising.
Current release - regressions:
- tipc: make node link identity publish thread safe
- dsa: felix: re-enable TAS guard band mode
- stmmac: correct clocks enabled in stmmac_vlan_rx_kill_vid()
- stmmac: fix system hang if change mac address after interface
ifdown
Current release - new code bugs:
- mptcp: avoid OOB access in setsockopt()
- bpf: Fix nested bpf_bprintf_prepare with more per-cpu buffers
- ethtool: stats: fix a copy-paste error - init correct array size
Previous releases - regressions:
- sched: fix packet stuck problem for lockless qdisc
- net: really orphan skbs tied to closing sk
- mlx4: fix EEPROM dump support
- bpf: fix alu32 const subreg bound tracking on bitwise operations
- bpf: fix mask direction swap upon off reg sign change
- bpf, offload: reorder offload callback 'prepare' in verifier
- stmmac: Fix MAC WoL not working if PHY does not support WoL
- packetmmap: fix only tx timestamp on request
- tipc: skb_linearize the head skb when reassembling msgs
Previous releases - always broken:
- mac80211: address recent "FragAttacks" vulnerabilities
- mac80211: do not accept/forward invalid EAPOL frames
- mptcp: avoid potential error message floods
- bpf, ringbuf: deny reserve of buffers larger than ringbuf to
prevent out of buffer writes
- bpf: forbid trampoline attach for functions with variable arguments
- bpf: add deny list of functions to prevent inf recursion of tracing
programs
- tls splice: check SPLICE_F_NONBLOCK instead of MSG_DONTWAIT
- can: isotp: prevent race between isotp_bind() and
isotp_setsockopt()
- netfilter: nft_set_pipapo_avx2: Add irq_fpu_usable() check,
fallback to non-AVX2 version
Misc:
- bpf: add kconfig knob for disabling unpriv bpf by default"
* tag 'net-5.13-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (172 commits)
net: phy: Document phydev::dev_flags bits allocation
mptcp: validate 'id' when stopping the ADD_ADDR retransmit timer
mptcp: avoid error message on infinite mapping
mptcp: drop unconditional pr_warn on bad opt
mptcp: avoid OOB access in setsockopt()
nfp: update maintainer and mailing list addresses
net: mvpp2: add buffer header handling in RX
bnx2x: Fix missing error code in bnx2x_iov_init_one()
net: zero-initialize tc skb extension on allocation
net: hns: Fix kernel-doc
sctp: fix the proc_handler for sysctl encap_port
sctp: add the missing setting for asoc encap_port
bpf, selftests: Adjust few selftest result_unpriv outcomes
bpf: No need to simulate speculative domain for immediates
bpf: Fix mask direction swap upon off reg sign change
bpf: Wrap aux data inside bpf_sanitize_info container
bpf: Fix BPF_LSM kconfig symbol dependency
selftests/bpf: Add test for l3 use of bpf_redirect_peer
bpftool: Add sock_release help info for cgroup attach/prog load command
net: dsa: microchip: enable phy errata workaround on 9567
...
|
||
|
Tejun Heo
|
c2a1197154 | Merge branch 'for-5.13-fixes' into for-5.14 | ||
|
zhangyi (F)
|
51fd43e280 |
block_dump: remove comments in docs
Now block_dump feature is gone, remove all comments in docs. Signed-off-by: zhangyi (F) <yi.zhang@huawei.com> Reviewed-by: Jan Kara <jack@suse.cz> Reviewed-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20210313030146.2882027-4-yi.zhang@huawei.com Signed-off-by: Jens Axboe <axboe@kernel.dk> |
||
|
Rafael J. Wysocki
|
c3d175e485 |
cpufreq: intel_pstate: hybrid: Avoid exposing two global attributes
The turbo_pct and num_pstates sysfs attributes represent CPU properties that may be different for differenty types of CPUs in a hybrid processor, so avoid exposing them in that case. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
||
|
Stafford Horne
|
4bc2bd5aef |
serial: liteuart: Add support for earlycon
Most litex boards using RISC-V soft cores us the sbi earlycon, however this is not available for non RISC-V litex SoC's. This patch enables earlycon for liteuart which is available on all Litex SoC's making support for earycon debugging more widely available. Cc: Florent Kermarrec <florent@enjoy-digital.fr> Cc: Mateusz Holenko <mholenko@antmicro.com> Cc: Joel Stanley <joel@jms.id.au> Cc: Gabriel L. Somlo <gsomlo@gmail.com> Reviewed-and-tested-by: Gabriel Somlo <gsomlo@gmail.com> Reviewed-by: Jiri Slaby <jirislaby@kernel.org> Reviewed-by: Joel Stanley <joel@jms.id.au> Signed-off-by: Stafford Horne <shorne@gmail.com> Link: https://lore.kernel.org/r/20210517115453.24365-1-shorne@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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|
Paul E. McKenney
|
641faf1b90 |
Merge branches 'bitmaprange.2021.05.10c', 'doc.2021.05.10c', 'fixes.2021.05.13a', 'kvfree_rcu.2021.05.10c', 'mmdumpobj.2021.05.10c', 'nocb.2021.05.12a', 'srcu.2021.05.12a', 'tasks.2021.05.18a' and 'torture.2021.05.10c' into HEAD
bitmaprange.2021.05.10c: Allow "all" for bitmap ranges. doc.2021.05.10c: Documentation updates. fixes.2021.05.13a: Miscellaneous fixes. kvfree_rcu.2021.05.10c: kvfree_rcu() updates. mmdumpobj.2021.05.10c: mem_dump_obj() updates. nocb.2021.05.12a: RCU NOCB CPU updates, including limited deoffloading. srcu.2021.05.12a: SRCU updates. tasks.2021.05.18a: Tasks-RCU updates. torture.2021.05.10c: Torture-test updates. |
||
|
Fenghua Yu
|
9d839c280b |
Documentation/admin-guide: Add bus lock ratelimit
Since bus lock rate limit changes the split_lock_detect parameter, update the documentation for the change. Signed-off-by: Fenghua Yu <fenghua.yu@intel.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Tony Luck <tony.luck@intel.com> Link: https://lore.kernel.org/r/20210419214958.4035512-4-fenghua.yu@intel.com |
||
|
Mel Gorman
|
fcb5017045 |
delayacct: Document task_delayacct sysctl
Update sysctl/kernel.rst. Signed-off-by: Mel Gorman <mgorman@suse.de> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/20210512114035.GH3672@suse.de |
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|
Rasmus Villemoes
|
f4d3f25ace |
docs: admin-guide: update description for kernel.modprobe sysctl
When I added CONFIG_MODPROBE_PATH, I neglected to update Documentation/.
It's still true that this defaults to /sbin/modprobe, but now via a level
of indirection. So document that the kernel might have been built with
something other than /sbin/modprobe as the initial value.
Link: https://lkml.kernel.org/r/20210420125324.1246826-1-linux@rasmusvillemoes.dk
Fixes:
|
||
|
Rasmus Villemoes
|
1e886090ce |
docs: admin-guide: update description for kernel.hotplug sysctl
It's been a few releases since this defaulted to /sbin/hotplug. Update
the text, and include pointers to the two CONFIG_UEVENT_HELPER{,_PATH}
config knobs whose help text could provide more info, but also hint
that the user probably doesn't need to care at all.
Fixes:
|
||
|
Peter Zijlstra
|
e4042ad492 |
delayacct: Default disabled
Assuming this stuff isn't actually used much; disable it by default and avoid allocating and tracking the task_delay_info structure. taskstats is changed to still report the regular sched and sched_info and only skip the missing task_delay_info fields instead of not reporting anything. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Ingo Molnar <mingo@kernel.org> Link: https://lkml.kernel.org/r/20210505111525.308018373@infradead.org |
||
|
David S. Miller
|
df6f823703 |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf
Daniel Borkmann says:
====================
pull-request: bpf 2021-05-11
The following pull-request contains BPF updates for your *net* tree.
We've added 13 non-merge commits during the last 8 day(s) which contain
a total of 21 files changed, 817 insertions(+), 382 deletions(-).
The main changes are:
1) Fix multiple ringbuf bugs in particular to prevent writable mmap of
read-only pages, from Andrii Nakryiko & Thadeu Lima de Souza Cascardo.
2) Fix verifier alu32 known-const subregister bound tracking for bitwise
operations and/or/xor, from Daniel Borkmann.
3) Reject trampoline attachment for functions with variable arguments,
and also add a deny list of other forbidden functions, from Jiri Olsa.
4) Fix nested bpf_bprintf_prepare() calls used by various helpers by
switching to per-CPU buffers, from Florent Revest.
5) Fix kernel compilation with BTF debug info on ppc64 due to pahole
missing TCP-CC functions like cubictcp_init, from Martin KaFai Lau.
6) Add a kconfig entry to provide an option to disallow unprivileged
BPF by default, from Daniel Borkmann.
7) Fix libbpf compilation for older libelf when GELF_ST_VISIBILITY()
macro is not available, from Arnaldo Carvalho de Melo.
8) Migrate test_tc_redirect to test_progs framework as prep work
for upcoming skb_change_head() fix & selftest, from Jussi Maki.
9) Fix a libbpf segfault in add_dummy_ksym_var() if BTF is not
present, from Ian Rogers.
10) Fix tx_only micro-benchmark in xdpsock BPF sample with proper frame
size, from Magnus Karlsson.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
|
||
|
Daniel Borkmann
|
08389d8882 |
bpf: Add kconfig knob for disabling unpriv bpf by default
Add a kconfig knob which allows for unprivileged bpf to be disabled by default.
If set, the knob sets /proc/sys/kernel/unprivileged_bpf_disabled to value of 2.
This still allows a transition of 2 -> {0,1} through an admin. Similarly,
this also still keeps 1 -> {1} behavior intact, so that once set to permanently
disabled, it cannot be undone aside from a reboot.
We've also added extra2 with max of 2 for the procfs handler, so that an admin
still has a chance to toggle between 0 <-> 2.
Either way, as an additional alternative, applications can make use of CAP_BPF
that we added a while ago.
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/74ec548079189e4e4dffaeb42b8987bb3c852eee.1620765074.git.daniel@iogearbox.net
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|
Zhang Qiang
|
d0bfa8b3c4 |
kvfree_rcu: Release a page cache under memory pressure
Add a drain_page_cache() function to drain a per-cpu page cache. The reason behind of it is a system can run into a low memory condition, in that case a page shrinker can ask for its users to free their caches in order to get extra memory available for other needs in a system. When a system hits such condition, a page cache is drained for all CPUs in a system. By default a page cache work is delayed with 5 seconds interval until a memory pressure disappears, if needed it can be changed. See a rcu_delay_page_cache_fill_msec module parameter. Co-developed-by: Uladzislau Rezki (Sony) <urezki@gmail.com> Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com> Signed-off-by: Zqiang <qiang.zhang@windriver.com> Signed-off-by: Paul E. McKenney <paulmck@kernel.org> |
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|
Yury Norov
|
b18def121f |
bitmap_parse: Support 'all' semantics
RCU code supports an 'all' group as a special case when parsing rcu_nocbs parameter. This patch moves the 'all' support to the core bitmap_parse code, so that all bitmap users can enjoy this extension. Moving 'all' parsing to a bitmap_parse level also allows users to pass patterns together with 'all' in regular group:pattern format, for example, "rcu_nocbs=all:1/2" would offload all the even-numbered CPUs regardless of the number of CPUs on the system. Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Yury Norov <yury.norov@gmail.com> Signed-off-by: Paul E. McKenney <paulmck@kernel.org> |
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|
Christian Brauner
|
340272b040 |
docs/cgroup: add entry for cgroup.kill
Give a brief overview of the cgroup.kill functionality. Link: https://lore.kernel.org/r/20210503143922.3093755-2-brauner@kernel.org Cc: Roman Gushchin <guro@fb.com> Cc: Tejun Heo <tj@kernel.org> Cc: cgroups@vger.kernel.org Reviewed-by: Shakeel Butt <shakeelb@google.com> Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com> Signed-off-by: Tejun Heo <tj@kernel.org> |
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Michael Ellerman
|
f96271cefe |
Merge branch 'master' into next
Merge master back into next, this allows us to resolve some conflicts in arch/powerpc/Kconfig, and also re-sort the symbols under config PPC so that they are in alphabetical order again. |
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Linus Torvalds
|
a48b0872e6 |
Merge branch 'akpm' (patches from Andrew)
Merge yet more updates from Andrew Morton: "This is everything else from -mm for this merge window. 90 patches. Subsystems affected by this patch series: mm (cleanups and slub), alpha, procfs, sysctl, misc, core-kernel, bitmap, lib, compat, checkpatch, epoll, isofs, nilfs2, hpfs, exit, fork, kexec, gcov, panic, delayacct, gdb, resource, selftests, async, initramfs, ipc, drivers/char, and spelling" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (90 commits) mm: fix typos in comments mm: fix typos in comments treewide: remove editor modelines and cruft ipc/sem.c: spelling fix fs: fat: fix spelling typo of values kernel/sys.c: fix typo kernel/up.c: fix typo kernel/user_namespace.c: fix typos kernel/umh.c: fix some spelling mistakes include/linux/pgtable.h: few spelling fixes mm/slab.c: fix spelling mistake "disired" -> "desired" scripts/spelling.txt: add "overflw" scripts/spelling.txt: Add "diabled" typo scripts/spelling.txt: add "overlfow" arm: print alloc free paths for address in registers mm/vmalloc: remove vwrite() mm: remove xlate_dev_kmem_ptr() drivers/char: remove /dev/kmem for good mm: fix some typos and code style problems ipc/sem.c: mundane typo fixes ... |
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David Hildenbrand
|
bbcd53c960 |
drivers/char: remove /dev/kmem for good
Patch series "drivers/char: remove /dev/kmem for good". Exploring /dev/kmem and /dev/mem in the context of memory hot(un)plug and memory ballooning, I started questioning the existence of /dev/kmem. Comparing it with the /proc/kcore implementation, it does not seem to be able to deal with things like a) Pages unmapped from the direct mapping (e.g., to be used by secretmem) -> kern_addr_valid(). virt_addr_valid() is not sufficient. b) Special cases like gart aperture memory that is not to be touched -> mem_pfn_is_ram() Unless I am missing something, it's at least broken in some cases and might fault/crash the machine. Looks like its existence has been questioned before in 2005 and 2010 [1], after ~11 additional years, it might make sense to revive the discussion. CONFIG_DEVKMEM is only enabled in a single defconfig (on purpose or by mistake?). All distributions disable it: in Ubuntu it has been disabled for more than 10 years, in Debian since 2.6.31, in Fedora at least starting with FC3, in RHEL starting with RHEL4, in SUSE starting from 15sp2, and OpenSUSE has it disabled as well. 1) /dev/kmem was popular for rootkits [2] before it got disabled basically everywhere. Ubuntu documents [3] "There is no modern user of /dev/kmem any more beyond attackers using it to load kernel rootkits.". RHEL documents in a BZ [5] "it served no practical purpose other than to serve as a potential security problem or to enable binary module drivers to access structures/functions they shouldn't be touching" 2) /proc/kcore is a decent interface to have a controlled way to read kernel memory for debugging puposes. (will need some extensions to deal with memory offlining/unplug, memory ballooning, and poisoned pages, though) 3) It might be useful for corner case debugging [1]. KDB/KGDB might be a better fit, especially, to write random memory; harder to shoot yourself into the foot. 4) "Kernel Memory Editor" [4] hasn't seen any updates since 2000 and seems to be incompatible with 64bit [1]. For educational purposes, /proc/kcore might be used to monitor value updates -- or older kernels can be used. 5) It's broken on arm64, and therefore, completely disabled there. Looks like it's essentially unused and has been replaced by better suited interfaces for individual tasks (/proc/kcore, KDB/KGDB). Let's just remove it. [1] https://lwn.net/Articles/147901/ [2] https://www.linuxjournal.com/article/10505 [3] https://wiki.ubuntu.com/Security/Features#A.2Fdev.2Fkmem_disabled [4] https://sourceforge.net/projects/kme/ [5] https://bugzilla.redhat.com/show_bug.cgi?id=154796 Link: https://lkml.kernel.org/r/20210324102351.6932-1-david@redhat.com Link: https://lkml.kernel.org/r/20210324102351.6932-2-david@redhat.com Signed-off-by: David Hildenbrand <david@redhat.com> Acked-by: Michal Hocko <mhocko@suse.com> Acked-by: Kees Cook <keescook@chromium.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: "Alexander A. Klimov" <grandmaster@al2klimov.de> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Alexandre Belloni <alexandre.belloni@bootlin.com> Cc: Andrew Lunn <andrew@lunn.ch> Cc: Andrey Zhizhikin <andrey.zhizhikin@leica-geosystems.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Brian Cain <bcain@codeaurora.org> Cc: Christian Borntraeger <borntraeger@de.ibm.com> Cc: Christophe Leroy <christophe.leroy@csgroup.eu> Cc: Chris Zankel <chris@zankel.net> Cc: Corentin Labbe <clabbe@baylibre.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Gerald Schaefer <gerald.schaefer@linux.ibm.com> Cc: Greentime Hu <green.hu@gmail.com> Cc: Gregory Clement <gregory.clement@bootlin.com> Cc: Heiko Carstens <hca@linux.ibm.com> Cc: Helge Deller <deller@gmx.de> Cc: Hillf Danton <hdanton@sina.com> Cc: huang ying <huang.ying.caritas@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com> Cc: James Troup <james.troup@canonical.com> Cc: Jiaxun Yang <jiaxun.yang@flygoat.com> Cc: Jonas Bonn <jonas@southpole.se> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Kairui Song <kasong@redhat.com> Cc: Krzysztof Kozlowski <krzk@kernel.org> Cc: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Cc: Liviu Dudau <liviu.dudau@arm.com> Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Cc: Luc Van Oostenryck <luc.vanoostenryck@gmail.com> Cc: Luis Chamberlain <mcgrof@kernel.org> Cc: Matthew Wilcox <willy@infradead.org> Cc: Matt Turner <mattst88@gmail.com> Cc: Max Filippov <jcmvbkbc@gmail.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Mike Rapoport <rppt@kernel.org> Cc: Mikulas Patocka <mpatocka@redhat.com> Cc: Minchan Kim <minchan@kernel.org> Cc: Niklas Schnelle <schnelle@linux.ibm.com> Cc: Oleksiy Avramchenko <oleksiy.avramchenko@sonymobile.com> Cc: openrisc@lists.librecores.org Cc: Palmer Dabbelt <palmerdabbelt@google.com> Cc: Paul Mackerras <paulus@samba.org> Cc: "Pavel Machek (CIP)" <pavel@denx.de> Cc: Pavel Machek <pavel@ucw.cz> Cc: "Peter Zijlstra (Intel)" <peterz@infradead.org> Cc: Pierre Morel <pmorel@linux.ibm.com> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: Richard Henderson <rth@twiddle.net> Cc: Rich Felker <dalias@libc.org> Cc: Robert Richter <rric@kernel.org> Cc: Rob Herring <robh@kernel.org> Cc: Russell King <linux@armlinux.org.uk> Cc: Sam Ravnborg <sam@ravnborg.org> Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Cc: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com> Cc: sparclinux@vger.kernel.org Cc: Stafford Horne <shorne@gmail.com> Cc: Stefan Kristiansson <stefan.kristiansson@saunalahti.fi> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Sudeep Holla <sudeep.holla@arm.com> Cc: Theodore Dubois <tblodt@icloud.com> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vasily Gorbik <gor@linux.ibm.com> Cc: Viresh Kumar <viresh.kumar@linaro.org> Cc: William Cohen <wcohen@redhat.com> Cc: Xiaoming Ni <nixiaoming@huawei.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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|
Rasmus Villemoes
|
e7cb072eb9 |
init/initramfs.c: do unpacking asynchronously
Patch series "background initramfs unpacking, and CONFIG_MODPROBE_PATH", v3. These two patches are independent, but better-together. The second is a rather trivial patch that simply allows the developer to change "/sbin/modprobe" to something else - e.g. the empty string, so that all request_module() during early boot return -ENOENT early, without even spawning a usermode helper, needlessly synchronizing with the initramfs unpacking. The first patch delegates decompressing the initramfs to a worker thread, allowing do_initcalls() in main.c to proceed to the device_ and late_ initcalls without waiting for that decompression (and populating of rootfs) to finish. Obviously, some of those later calls may rely on the initramfs being available, so I've added synchronization points in the firmware loader and usermodehelper paths - there might be other places that would need this, but so far no one has been able to think of any places I have missed. There's not much to win if most of the functionality needed during boot is only available as modules. But systems with a custom-made .config and initramfs can boot faster, partly due to utilizing more than one cpu earlier, partly by avoiding known-futile modprobe calls (which would still trigger synchronization with the initramfs unpacking, thus eliminating most of the first benefit). This patch (of 2): Most of the boot process doesn't actually need anything from the initramfs, until of course PID1 is to be executed. So instead of doing the decompressing and populating of the initramfs synchronously in populate_rootfs() itself, push that off to a worker thread. This is primarily motivated by an embedded ppc target, where unpacking even the rather modest sized initramfs takes 0.6 seconds, which is long enough that the external watchdog becomes unhappy that it doesn't get attention soon enough. By doing the initramfs decompression in a worker thread, we get to do the device_initcalls and hence start petting the watchdog much sooner. Normal desktops might benefit as well. On my mostly stock Ubuntu kernel, my initramfs is a 26M xz-compressed blob, decompressing to around 126M. That takes almost two seconds: [ 0.201454] Trying to unpack rootfs image as initramfs... [ 1.976633] Freeing initrd memory: 29416K Before this patch, these lines occur consecutively in dmesg. With this patch, the timestamps on these two lines is roughly the same as above, but with 172 lines inbetween - so more than one cpu has been kept busy doing work that would otherwise only happen after the populate_rootfs() finished. Should one of the initcalls done after rootfs_initcall time (i.e., device_ and late_ initcalls) need something from the initramfs (say, a kernel module or a firmware blob), it will simply wait for the initramfs unpacking to be done before proceeding, which should in theory make this completely safe. But if some driver pokes around in the filesystem directly and not via one of the official kernel interfaces (i.e. request_firmware*(), call_usermodehelper*) that theory may not hold - also, I certainly might have missed a spot when sprinkling wait_for_initramfs(). So there is an escape hatch in the form of an initramfs_async= command line parameter. Link: https://lkml.kernel.org/r/20210313212528.2956377-1-linux@rasmusvillemoes.dk Link: https://lkml.kernel.org/r/20210313212528.2956377-2-linux@rasmusvillemoes.dk Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk> Reviewed-by: Luis Chamberlain <mcgrof@kernel.org> Cc: Jessica Yu <jeyu@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Nick Desaulniers <ndesaulniers@google.com> Cc: Takashi Iwai <tiwai@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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|
Linus Torvalds
|
939b7cbc00 |
RISC-V Patches for the 5.13 Merge Window, Part 1
* Support for the memtest= kernel command-line argument. * Support for building the kernel with FORTIFY_SOURCE. * Support for generic clockevent broadcasts. * Support for the buildtar build target. * Some build system cleanups to pass more LLVM-friendly arguments. * Support for kprobes. * A rearranged kernel memory map, the first part of supporting sv48 systems. * Improvements to kexec, along with support for kdump and crash kernels. * An alternatives-based errata framework, along with support for handling a pair of errata that manifest on some SiFive designs (including the HiFive Unmatched). * Support for XIP. * A device tree for the Microchip PolarFire ICICLE SoC and associated dev board. Along with a bunch of cleanups. There are already a handful of fixes on the list so there will likely be a part 2. -----BEGIN PGP SIGNATURE----- iQJHBAABCgAxFiEEKzw3R0RoQ7JKlDp6LhMZ81+7GIkFAmCS4lITHHBhbG1lckBk YWJiZWx0LmNvbQAKCRAuExnzX7sYieZqEACSihfcOgZ/oyGWN3chca917/yCWimM DOu37Zlh81TNPgzzJwbT44IY5sg/lSecwktxs665TChiJjr3JlM4jmz+u64KOTA8 mTWhqZNr5zT9kFj/m3x0V9yYOVr9g43QRmIlc14d+8JaQDw0N8WeH/yK85/CXDSS X5gQK/e9q/yPf/NPyPuPm67jDsFnJERINWaAHI8lhA5fvFyy/xRLmSkuexchysss XOGfyxxX590jGLK1vD+5wccX7ZwfwU4jriTaxyah/VBl8QUur/xSPVyspHIdWiMG jrNXI1dg6oI861BdjryUpZI0iYJaRe5FRWUx7uTIqHfIyL/MnvYI7USVYOOPb72M yZgN903R++5NeUUVTzfXwaigTwfXAPB6USFqZpEfRAf204pgNybmznJWThAVBdYG rUixp7GsEMU3aAT2tE/iHR33JQxQfnZq8Tg43/4gB7MoACrzQrYrGcPnj9xssMyV F1hnao3dr+5Xjo3MwfkW9JvLPwvDuE3mdrdj+a0XZ45gbTJeuBhYxo3VOsFeijhQ gf/VYuoNn5iae9fiMzx5rlmFT9NJDYKDhla+BpAel84/6nRryyfCZCaE5FvDynOO CNQynaeJMIMEygPBYR9FVVCwm+EtVsz3NVFKEuo5ilQpgX8ipctxiqy2+moZALLN OWlEH6BKEgXqkw== =PsA8 -----END PGP SIGNATURE----- Merge tag 'riscv-for-linus-5.13-mw0' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux Pull RISC-V updates from Palmer Dabbelt: - Support for the memtest= kernel command-line argument. - Support for building the kernel with FORTIFY_SOURCE. - Support for generic clockevent broadcasts. - Support for the buildtar build target. - Some build system cleanups to pass more LLVM-friendly arguments. - Support for kprobes. - A rearranged kernel memory map, the first part of supporting sv48 systems. - Improvements to kexec, along with support for kdump and crash kernels. - An alternatives-based errata framework, along with support for handling a pair of errata that manifest on some SiFive designs (including the HiFive Unmatched). - Support for XIP. - A device tree for the Microchip PolarFire ICICLE SoC and associated dev board. ... along with a bunch of cleanups. There are already a handful of fixes on the list so there will likely be a part 2. * tag 'riscv-for-linus-5.13-mw0' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux: (45 commits) RISC-V: Always define XIP_FIXUP riscv: Remove 32b kernel mapping from page table dump riscv: Fix 32b kernel build with CONFIG_DEBUG_VIRTUAL=y RISC-V: Fix error code returned by riscv_hartid_to_cpuid() RISC-V: Enable Microchip PolarFire ICICLE SoC RISC-V: Initial DTS for Microchip ICICLE board dt-bindings: riscv: microchip: Add YAML documentation for the PolarFire SoC RISC-V: Add Microchip PolarFire SoC kconfig option RISC-V: enable XIP RISC-V: Add crash kernel support RISC-V: Add kdump support RISC-V: Improve init_resources() RISC-V: Add kexec support RISC-V: Add EM_RISCV to kexec UAPI header riscv: vdso: fix and clean-up Makefile riscv/mm: Use BUG_ON instead of if condition followed by BUG. riscv/kprobe: fix kernel panic when invoking sys_read traced by kprobe riscv: Set ARCH_HAS_STRICT_MODULE_RWX if MMU riscv: module: Create module allocations without exec permissions riscv: bpf: Avoid breaking W^X ... |
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|
Linus Torvalds
|
a3f53e8adf |
A few late-arriving documentation fixes, including some oprofile cleanup, a
kernel-doc fix, some regression-reporting updates, and the usual minor fixes. -----BEGIN PGP SIGNATURE----- iQFDBAABCAAtFiEEIw+MvkEiF49krdp9F0NaE2wMflgFAmCTCMoPHGNvcmJldEBs d24ubmV0AAoJEBdDWhNsDH5YsecH/jSLfUKS8BrIR8CcwG7bEl3PLQnCRe2Qc/+P aTkJf2v9WRMdNgjf6tIoYL0EqRtyDT7bL5NgsfxqX9gqTxjRdiRoT1ZvKmNFD9Zk 4vPewVEDxQkz1Odq+vh0wLWMWV+AktHWFPRZlpfqTZ7mt9l8pk55LWJNKQs5dOVZ d6w3XoE31WbQHi6CBFwTFoHeFAXnvYg+LUkeuYpaFpYIB0zvTvTThMffSWlPzsUk ADRJgUQ0TIXhPJ52Ak0y+sy24AYu/0RjUTaduoUz4eEp+toGqp21ZCXuRfPXobOG Ai42D3FgHZGaG/hIkHmpny5rRaxF6kK+pGkFQq04HW/j2BwMZac= =he/3 -----END PGP SIGNATURE----- Merge tag 'docs-5.13-2' of git://git.lwn.net/linux Pull documentation fixes from Jonathan Corbet: "A few late-arriving documentation fixes, including some oprofile cleanup, a kernel-doc fix, some regression-reporting updates, and the usual minor fixes" * tag 'docs-5.13-2' of git://git.lwn.net/linux: Enlisted oprofile version line removed oprofiled version output line removed from the list Removed the oprofiled version option docs: reporting-issues.rst: CC subsystem and maintainers on regressions docs: correct URL to bios and kernel developer's guide docs/core-api: Consistent code style docs/zh_CN: Adjust order and content of zh_CN/index.rst Documentation: input: joydev file corrections docs: Fix typo in Documentation/x86/x86_64/5level-paging.rst kernel-doc: Add support for __deprecated |
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|
Linus Torvalds
|
8404c9fbc8 |
Merge branch 'akpm' (patches from Andrew)
Merge more updates from Andrew Morton:
"The remainder of the main mm/ queue.
143 patches.
Subsystems affected by this patch series (all mm): pagecache, hugetlb,
userfaultfd, vmscan, compaction, migration, cma, ksm, vmstat, mmap,
kconfig, util, memory-hotplug, zswap, zsmalloc, highmem, cleanups, and
kfence"
* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (143 commits)
kfence: use power-efficient work queue to run delayed work
kfence: maximize allocation wait timeout duration
kfence: await for allocation using wait_event
kfence: zero guard page after out-of-bounds access
mm/process_vm_access.c: remove duplicate include
mm/mempool: minor coding style tweaks
mm/highmem.c: fix coding style issue
btrfs: use memzero_page() instead of open coded kmap pattern
iov_iter: lift memzero_page() to highmem.h
mm/zsmalloc: use BUG_ON instead of if condition followed by BUG.
mm/zswap.c: switch from strlcpy to strscpy
arm64/Kconfig: introduce ARCH_MHP_MEMMAP_ON_MEMORY_ENABLE
x86/Kconfig: introduce ARCH_MHP_MEMMAP_ON_MEMORY_ENABLE
mm,memory_hotplug: add kernel boot option to enable memmap_on_memory
acpi,memhotplug: enable MHP_MEMMAP_ON_MEMORY when supported
mm,memory_hotplug: allocate memmap from the added memory range
mm,memory_hotplug: factor out adjusting present pages into adjust_present_page_count()
mm,memory_hotplug: relax fully spanned sections check
drivers/base/memory: introduce memory_block_{online,offline}
mm/memory_hotplug: remove broken locking of zone PCP structures during hot remove
...
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Linus Torvalds
|
5d6a1b84e0 |
gpio updates for v5.13
- new driver for the Realtek Otto GPIO controller - ACPI support for gpio-mpc8xxx - edge event support for gpio-sch (+ Kconfig fixes) - Kconfig improvements in gpio-ich - fixes to older issues in gpio-mockup - ACPI quirk for ignoring EC wakeups on Dell Venue 10 Pro 5055 - improve the GPIO aggregator code by using more generic interfaces instead of reimplementing them in the driver - convert the DT bindings for gpio-74x164 to yaml - documentation improvements - a slew of other minor fixes and improvements to GPIO drivers -----BEGIN PGP SIGNATURE----- iQIzBAABCAAdFiEEFp3rbAvDxGAT0sefEacuoBRx13IFAmCSptQACgkQEacuoBRx 13KFDQ/+NOkRQuJarKAvGuR5LJ81CbBfH72/m9gJMB9gwNBS7g+esNWrZG/riWVM BVs2fxlC52+ppN1rV7iMEaXSyREULrcidgoZ0H7X2vsI9MRkk/fjzpTRwbJbSLPo C+IXBAHHfuUC1FQNtQk1cuZXl7PToHd/A14KZIkLOBxLjQddpSo7TTkv23Ub1BA7 Se13EaDrBJxzfmLR900kAKCFDyM8VRnIt7/euhmlTcXCxOg/lCbGZ4eBpEZasUs5 UA9PQX0dnnwtMER4b4TQPIdQ345A0l+xqALr8X2leqQ0AqsWQ7kveMwfSRlXI5Hr zyuXRiA0e84h6HXIHE59kXqoa4LJVnW59hgjYx0D+fcZ5gNVnaRg/4LsztJmMd/f uVAZazE4jd81Cr/kbtpEu5mfGPjOVBeUCeDnKtRovnaSMi24HwqvHqIauI9sM8fN locTCYOdLfvxucAJHZ/BWe8yl301/+IlwiHiN+7+/3ljYB+HjAH42rdPwFpP1BWJ bpgd90KxLHezeqsv83U9CTTrVK9ZM2yisVunQUo3bVi6Ztxl2Juv16P5Qs0IJW2F mly+KNTa4M6NKCdP6luEnazmifFIsnreCzTMfPoa9w+eu/vpIw6lZDFpDAbePV+A 8XJ99TxV1Bk9kUjvKiEi2qx6uW7f5k8JIwvRvJWhRXkEzufJyUI= =5vLN -----END PGP SIGNATURE----- Merge tag 'gpio-updates-for-v5.13-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux Pull gpio updates from Bartosz Golaszewski: - new driver for the Realtek Otto GPIO controller - ACPI support for gpio-mpc8xxx - edge event support for gpio-sch (+ Kconfig fixes) - Kconfig improvements in gpio-ich - fixes to older issues in gpio-mockup - ACPI quirk for ignoring EC wakeups on Dell Venue 10 Pro 5055 - improve the GPIO aggregator code by using more generic interfaces instead of reimplementing them in the driver - convert the DT bindings for gpio-74x164 to yaml - documentation improvements - a slew of other minor fixes and improvements to GPIO drivers * tag 'gpio-updates-for-v5.13-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux: (34 commits) dt-bindings: gpio: add YAML description for rockchip,gpio-bank gpio: mxs: remove useless function dt-bindings: gpio: fairchild,74hc595: Convert to json-schema gpio: it87: remove unused code gpio: 104-dio-48e: Fix coding style issues gpio: mpc8xxx: Add ACPI support gpio: ich: Switch to be dependent on LPC_ICH gpio: sch: Drop MFD_CORE selection gpio: sch: depends on LPC_SCH gpiolib: acpi: Add quirk to ignore EC wakeups on Dell Venue 10 Pro 5055 gpio: sch: Hook into ACPI GPE handler to catch GPIO edge events gpio: sch: Add edge event support gpio: aggregator: Replace custom get_arg() with a generic next_arg() lib/cmdline: Export next_arg() for being used in modules gpio: omap: Use device_get_match_data() helper gpio: Add Realtek Otto GPIO support dt-bindings: gpio: Binding for Realtek Otto GPIO docs: kernel-parameters: Add gpio_mockup_named_lines docs: kernel-parameters: Move gpio-mockup for alphabetic order lib: bitmap: provide devm_bitmap_alloc() and devm_bitmap_zalloc() ... |
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Oscar Salvador
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e3a9d9fcc3 |
mm,memory_hotplug: add kernel boot option to enable memmap_on_memory
Self stored memmap leads to a sparse memory situation which is unsuitable for workloads that requires large contiguous memory chunks, so make this an opt-in which needs to be explicitly enabled. To control this, let memory_hotplug have its own memory space, as suggested by David, so we can add memory_hotplug.memmap_on_memory parameter. Link: https://lkml.kernel.org/r/20210421102701.25051-7-osalvador@suse.de Signed-off-by: Oscar Salvador <osalvador@suse.de> Reviewed-by: David Hildenbrand <david@redhat.com> Acked-by: Michal Hocko <mhocko@suse.com> Cc: Anshuman Khandual <anshuman.khandual@arm.com> Cc: Pavel Tatashin <pasha.tatashin@soleen.com> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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Pavel Tatashin
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fa965fd548 |
memory-hotplug.rst: add a note about ZONE_MOVABLE and page pinning
Document the special handling of page pinning when ZONE_MOVABLE present. Link: https://lkml.kernel.org/r/20210215161349.246722-11-pasha.tatashin@soleen.com Signed-off-by: Pavel Tatashin <pasha.tatashin@soleen.com> Suggested-by: David Hildenbrand <david@redhat.com> Acked-by: Michal Hocko <mhocko@suse.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: David Rientjes <rientjes@google.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Ira Weiny <ira.weiny@intel.com> Cc: James Morris <jmorris@namei.org> Cc: Jason Gunthorpe <jgg@nvidia.com> Cc: Jason Gunthorpe <jgg@ziepe.ca> Cc: John Hubbard <jhubbard@nvidia.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Mel Gorman <mgorman@suse.de> Cc: Michal Hocko <mhocko@kernel.org> Cc: Mike Kravetz <mike.kravetz@oracle.com> Cc: Oscar Salvador <osalvador@suse.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Sasha Levin <sashal@kernel.org> Cc: Steven Rostedt (VMware) <rostedt@goodmis.org> Cc: Tyler Hicks <tyhicks@linux.microsoft.com> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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Axel Rasmussen
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b8da5cd4e5 |
userfaultfd: update documentation to describe minor fault handling
Reword / reorganize things a little bit into "lists", so new features / modes / ioctls can sort of just be appended. Describe how UFFDIO_REGISTER_MODE_MINOR and UFFDIO_CONTINUE can be used to intercept and resolve minor faults. Make it clear that COPY and ZEROPAGE are used for MISSING faults, whereas CONTINUE is used for MINOR faults. Link: https://lkml.kernel.org/r/20210301222728.176417-6-axelrasmussen@google.com Signed-off-by: Axel Rasmussen <axelrasmussen@google.com> Reviewed-by: Peter Xu <peterx@redhat.com> Cc: Adam Ruprecht <ruprecht@google.com> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Alexey Dobriyan <adobriyan@gmail.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Anshuman Khandual <anshuman.khandual@arm.com> Cc: Cannon Matthews <cannonmatthews@google.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Chinwen Chang <chinwen.chang@mediatek.com> Cc: David Rientjes <rientjes@google.com> Cc: "Dr . David Alan Gilbert" <dgilbert@redhat.com> Cc: Huang Ying <ying.huang@intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jann Horn <jannh@google.com> Cc: Jerome Glisse <jglisse@redhat.com> Cc: Kirill A. Shutemov <kirill@shutemov.name> Cc: Lokesh Gidra <lokeshgidra@google.com> Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: "Michal Koutn" <mkoutny@suse.com> Cc: Michel Lespinasse <walken@google.com> Cc: Mike Kravetz <mike.kravetz@oracle.com> Cc: Mike Rapoport <rppt@linux.vnet.ibm.com> Cc: Mina Almasry <almasrymina@google.com> Cc: Nicholas Piggin <npiggin@gmail.com> Cc: Oliver Upton <oupton@google.com> Cc: Shaohua Li <shli@fb.com> Cc: Shawn Anastasio <shawn@anastas.io> Cc: Steven Price <steven.price@arm.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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Alexander Dahl
|
6984a32034 |
docs: kernel-parameters: Add gpio_mockup_named_lines
Missing since introduced in the driver.
Fixes:
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Alexander Dahl
|
3eb52226de |
docs: kernel-parameters: Move gpio-mockup for alphabetic order
All other sections are ordered alphabetically so do the same for
gpio-mockup.
Fixes:
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Nicholas Piggin
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8abddd968a |
powerpc/64s/radix: Enable huge vmalloc mappings
This reduces TLB misses by nearly 30x on a `git diff` workload on a 2-node POWER9 (59,800 -> 2,100) and reduces CPU cycles by 0.54%, due to vfs hashes being allocated with 2MB pages. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu> Acked-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20210503091755.613393-1-npiggin@gmail.com |
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Thorsten Leemhuis
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0043f0b27a |
docs: reporting-issues.rst: CC subsystem and maintainers on regressions
When reporting a regression, users ideally should CC the subsystem and its maintainers, as that will ensure they get aware of the regression quickly. And if the culprit is known, they should also CC everyone who signed if off; the text mentioned the latter in once place already, but forgot to do so in two other areas where it's relevant. While fixing this also remind readers to check the mailing list archives for issues that need to be reported to a bug tracker, as someone might have reported it by mail only. All of this got triggered by a recent report where these changes would have made a difference. Signed-off-by: Thorsten Leemhuis <linux@leemhuis.info> Link: https://lore.kernel.org/lkml/dff6badf-58f5-98c8-871c-94d901ac6919@leemhuis.info/ Link: https://lore.kernel.org/lkml/CAJZ5v0hX2StQVttAciHYH-urUH+Hi92z9z2ZbcNgQPt0E2Jpwg@mail.gmail.com/ Link: https://lore.kernel.org/r/dd13f10c30e79e550215e53a8103406daec4e593.1618482489.git.linux@leemhuis.info Signed-off-by: Jonathan Corbet <corbet@lwn.net> |
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Linus Torvalds
|
4f9701057a |
IOMMU Updates for Linux v5.13
Including:
- Big cleanup of almost unsused parts of the IOMMU API by
Christoph Hellwig. This mostly affects the Freescale PAMU
driver.
- New IOMMU driver for Unisoc SOCs
- ARM SMMU Updates from Will:
- SMMUv3: Drop vestigial PREFETCH_ADDR support
- SMMUv3: Elide TLB sync logic for empty gather
- SMMUv3: Fix "Service Failure Mode" handling
- SMMUv2: New Qualcomm compatible string
- Removal of the AMD IOMMU performance counter writeable check
on AMD. It caused long boot delays on some machines and is
only needed to work around an errata on some older (possibly
pre-production) chips. If someone is still hit by this
hardware issue anyway the performance counters will just
return 0.
- Support for targeted invalidations in the AMD IOMMU driver.
Before that the driver only invalidated a single 4k page or the
whole IO/TLB for an address space. This has been extended now
and is mostly useful for emulated AMD IOMMUs.
- Several fixes for the Shared Virtual Memory support in the
Intel VT-d driver
- Mediatek drivers can now be built as modules
- Re-introduction of the forcedac boot option which got lost
when converting the Intel VT-d driver to the common dma-iommu
implementation.
- Extension of the IOMMU device registration interface and
support iommu_ops to be const again when drivers are built as
modules.
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Merge tag 'iommu-updates-v5.13' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
Pull iommu updates from Joerg Roedel:
- Big cleanup of almost unsused parts of the IOMMU API by Christoph
Hellwig. This mostly affects the Freescale PAMU driver.
- New IOMMU driver for Unisoc SOCs
- ARM SMMU Updates from Will:
- Drop vestigial PREFETCH_ADDR support (SMMUv3)
- Elide TLB sync logic for empty gather (SMMUv3)
- Fix "Service Failure Mode" handling (SMMUv3)
- New Qualcomm compatible string (SMMUv2)
- Removal of the AMD IOMMU performance counter writeable check on AMD.
It caused long boot delays on some machines and is only needed to
work around an errata on some older (possibly pre-production) chips.
If someone is still hit by this hardware issue anyway the performance
counters will just return 0.
- Support for targeted invalidations in the AMD IOMMU driver. Before
that the driver only invalidated a single 4k page or the whole IO/TLB
for an address space. This has been extended now and is mostly useful
for emulated AMD IOMMUs.
- Several fixes for the Shared Virtual Memory support in the Intel VT-d
driver
- Mediatek drivers can now be built as modules
- Re-introduction of the forcedac boot option which got lost when
converting the Intel VT-d driver to the common dma-iommu
implementation.
- Extension of the IOMMU device registration interface and support
iommu_ops to be const again when drivers are built as modules.
* tag 'iommu-updates-v5.13' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (84 commits)
iommu: Streamline registration interface
iommu: Statically set module owner
iommu/mediatek-v1: Add error handle for mtk_iommu_probe
iommu/mediatek-v1: Avoid build fail when build as module
iommu/mediatek: Always enable the clk on resume
iommu/fsl-pamu: Fix uninitialized variable warning
iommu/vt-d: Force to flush iotlb before creating superpage
iommu/amd: Put newline after closing bracket in warning
iommu/vt-d: Fix an error handling path in 'intel_prepare_irq_remapping()'
iommu/vt-d: Fix build error of pasid_enable_wpe() with !X86
iommu/amd: Remove performance counter pre-initialization test
Revert "iommu/amd: Fix performance counter initialization"
iommu/amd: Remove duplicate check of devid
iommu/exynos: Remove unneeded local variable initialization
iommu/amd: Page-specific invalidations for more than one page
iommu/arm-smmu-v3: Remove the unused fields for PREFETCH_CONFIG command
iommu/vt-d: Avoid unnecessary cache flush in pasid entry teardown
iommu/vt-d: Invalidate PASID cache when root/context entry changed
iommu/vt-d: Remove WO permissions on second-level paging entries
iommu/vt-d: Report the right page fault address
...
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|
Linus Torvalds
|
d42f323a7d |
Merge branch 'akpm' (patches from Andrew)
Merge misc updates from Andrew Morton: "A few misc subsystems and some of MM. 175 patches. Subsystems affected by this patch series: ia64, kbuild, scripts, sh, ocfs2, kfifo, vfs, kernel/watchdog, and mm (slab-generic, slub, kmemleak, debug, pagecache, msync, gup, memremap, memcg, pagemap, mremap, dma, sparsemem, vmalloc, documentation, kasan, initialization, pagealloc, and memory-failure)" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (175 commits) mm/memory-failure: unnecessary amount of unmapping mm/mmzone.h: fix existing kernel-doc comments and link them to core-api mm: page_alloc: ignore init_on_free=1 for debug_pagealloc=1 net: page_pool: use alloc_pages_bulk in refill code path net: page_pool: refactor dma_map into own function page_pool_dma_map SUNRPC: refresh rq_pages using a bulk page allocator SUNRPC: set rq_page_end differently mm/page_alloc: inline __rmqueue_pcplist mm/page_alloc: optimize code layout for __alloc_pages_bulk mm/page_alloc: add an array-based interface to the bulk page allocator mm/page_alloc: add a bulk page allocator mm/page_alloc: rename alloced to allocated mm/page_alloc: duplicate include linux/vmalloc.h mm, page_alloc: avoid page_to_pfn() in move_freepages() mm/Kconfig: remove default DISCONTIGMEM_MANUAL mm: page_alloc: dump migrate-failed pages mm/mempolicy: fix mpol_misplaced kernel-doc mm/mempolicy: rewrite alloc_pages_vma documentation mm/mempolicy: rewrite alloc_pages documentation mm/mempolicy: rename alloc_pages_current to alloc_pages ... |
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|
Linus Torvalds
|
c70a4be130 |
powerpc updates for 5.13
- Enable KFENCE for 32-bit. - Implement EBPF for 32-bit. - Convert 32-bit to do interrupt entry/exit in C. - Convert 64-bit BookE to do interrupt entry/exit in C. - Changes to our signal handling code to use user_access_begin/end() more extensively. - Add support for time namespaces (CONFIG_TIME_NS) - A series of fixes that allow us to reenable STRICT_KERNEL_RWX. - Other smaller features, fixes & cleanups. Thanks to: Alexey Kardashevskiy, Andreas Schwab, Andrew Donnellan, Aneesh Kumar K.V, Athira Rajeev, Bhaskar Chowdhury, Bixuan Cui, Cédric Le Goater, Chen Huang, Chris Packham, Christophe Leroy, Christopher M. Riedl, Colin Ian King, Dan Carpenter, Daniel Axtens, Daniel Henrique Barboza, David Gibson, Davidlohr Bueso, Denis Efremov, dingsenjie, Dmitry Safonov, Dominic DeMarco, Fabiano Rosas, Ganesh Goudar, Geert Uytterhoeven, Geetika Moolchandani, Greg Kurz, Guenter Roeck, Haren Myneni, He Ying, Jiapeng Chong, Jordan Niethe, Laurent Dufour, Lee Jones, Leonardo Bras, Li Huafei, Madhavan Srinivasan, Mahesh Salgaonkar, Masahiro Yamada, Nathan Chancellor, Nathan Lynch, Nicholas Piggin, Oliver O'Halloran, Paul Menzel, Pu Lehui, Randy Dunlap, Ravi Bangoria, Rosen Penev, Russell Currey, Santosh Sivaraj, Sebastian Andrzej Siewior, Segher Boessenkool, Shivaprasad G Bhat, Srikar Dronamraju, Stephen Rothwell, Thadeu Lima de Souza Cascardo, Thomas Gleixner, Tony Ambardar, Tyrel Datwyler, Vaibhav Jain, Vincenzo Frascino, Xiongwei Song, Yang Li, Yu Kuai, Zhang Yunkai. -----BEGIN PGP SIGNATURE----- iQJHBAABCAAxFiEEJFGtCPCthwEv2Y/bUevqPMjhpYAFAmCLV1kTHG1wZUBlbGxl cm1hbi5pZC5hdQAKCRBR6+o8yOGlgLUyD/4jrTolG4sVec211hYO+0VuJzoqN4Cf j2CA2Ju39butnSMiq4LJUPRB7QRZY1OofkoNFpZeDQspjfZXPz2ulpYAz+SxHWE2 ReHPmWH1rOABlUPXFboePF4OLwmAs9eR5mN2z9HpKXbT3k78HaToLqiONyB4fVCr Q5TkJeRn/Y7ZJLdyPLTpczHHleQ8KoM6kT7ncXnTm6p97JOBJSrGaJ5N/8X5a4+e 6jtgB7Pvw8jNDShSr8BDLBgBZZcmoTiuG8KfgwRZ+m+mKB1yI2X8S/a54w/lDi9g UcSv3jQcFLJuW+T/pYe4R330uWDYa0cwjJOtMmsJ98S4EYOevoe9fZuL97qNshme xtBr4q1i03G1icYOJJ8dXtvabG2rUzj8t1SCDpwYfrynzTWVRikiQYTXUBhRSFoK nsoklvKd2IZa485XYJ2ljSyClMy8S4yJJ9RuzZ94DTXDSJUesKuyRWGnso4mhkcl wvl4wwMTJvnCMKVo6dsJyV24QWfd6dABxzm04uPA94CKhG33UwK8252jXVeaohSb WSO7qWBONgDXQLJ0mXRcEYa9NHvFS4Jnp6APbxnHr1gS+K+PNkD4gPBf34FoyN0E 9s27kvEYk5vr8APUclETF6+FkbGUD5bFbusjt3hYloFpAoHQ/k5pFVDsOZNPA8sW fDIRp05KunDojw== =dfKL -----END PGP SIGNATURE----- Merge tag 'powerpc-5.13-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux Pull powerpc updates from Michael Ellerman: - Enable KFENCE for 32-bit. - Implement EBPF for 32-bit. - Convert 32-bit to do interrupt entry/exit in C. - Convert 64-bit BookE to do interrupt entry/exit in C. - Changes to our signal handling code to use user_access_begin/end() more extensively. - Add support for time namespaces (CONFIG_TIME_NS) - A series of fixes that allow us to reenable STRICT_KERNEL_RWX. - Other smaller features, fixes & cleanups. Thanks to Alexey Kardashevskiy, Andreas Schwab, Andrew Donnellan, Aneesh Kumar K.V, Athira Rajeev, Bhaskar Chowdhury, Bixuan Cui, Cédric Le Goater, Chen Huang, Chris Packham, Christophe Leroy, Christopher M. Riedl, Colin Ian King, Dan Carpenter, Daniel Axtens, Daniel Henrique Barboza, David Gibson, Davidlohr Bueso, Denis Efremov, dingsenjie, Dmitry Safonov, Dominic DeMarco, Fabiano Rosas, Ganesh Goudar, Geert Uytterhoeven, Geetika Moolchandani, Greg Kurz, Guenter Roeck, Haren Myneni, He Ying, Jiapeng Chong, Jordan Niethe, Laurent Dufour, Lee Jones, Leonardo Bras, Li Huafei, Madhavan Srinivasan, Mahesh Salgaonkar, Masahiro Yamada, Nathan Chancellor, Nathan Lynch, Nicholas Piggin, Oliver O'Halloran, Paul Menzel, Pu Lehui, Randy Dunlap, Ravi Bangoria, Rosen Penev, Russell Currey, Santosh Sivaraj, Sebastian Andrzej Siewior, Segher Boessenkool, Shivaprasad G Bhat, Srikar Dronamraju, Stephen Rothwell, Thadeu Lima de Souza Cascardo, Thomas Gleixner, Tony Ambardar, Tyrel Datwyler, Vaibhav Jain, Vincenzo Frascino, Xiongwei Song, Yang Li, Yu Kuai, and Zhang Yunkai. * tag 'powerpc-5.13-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (302 commits) powerpc/signal32: Fix erroneous SIGSEGV on RT signal return powerpc: Avoid clang uninitialized warning in __get_user_size_allowed powerpc/papr_scm: Mark nvdimm as unarmed if needed during probe powerpc/kvm: Fix build error when PPC_MEM_KEYS/PPC_PSERIES=n powerpc/kasan: Fix shadow start address with modules powerpc/kernel/iommu: Use largepool as a last resort when !largealloc powerpc/kernel/iommu: Align size for IOMMU_PAGE_SIZE() to save TCEs powerpc/44x: fix spelling mistake in Kconfig "varients" -> "variants" powerpc/iommu: Annotate nested lock for lockdep powerpc/iommu: Do not immediately panic when failed IOMMU table allocation powerpc/iommu: Allocate it_map by vmalloc selftests/powerpc: remove unneeded semicolon powerpc/64s: remove unneeded semicolon powerpc/eeh: remove unneeded semicolon powerpc/selftests: Add selftest to test concurrent perf/ptrace events powerpc/selftests/perf-hwbreak: Add testcases for 2nd DAWR powerpc/selftests/perf-hwbreak: Coalesce event creation code powerpc/selftests/ptrace-hwbreak: Add testcases for 2nd DAWR powerpc/configs: Add IBMVNIC to some 64-bit configs selftests/powerpc: Add uaccess flush test ... |
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Matthew Wilcox (Oracle)
|
84172f4bb7 |
mm/page_alloc: combine __alloc_pages and __alloc_pages_nodemask
There are only two callers of __alloc_pages() so prune the thicket of alloc_page variants by combining the two functions together. Current callers of __alloc_pages() simply add an extra 'NULL' parameter and current callers of __alloc_pages_nodemask() call __alloc_pages() instead. Link: https://lkml.kernel.org/r/20210225150642.2582252-4-willy@infradead.org Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Acked-by: Vlastimil Babka <vbabka@suse.cz> Acked-by: Michal Hocko <mhocko@suse.com> Cc: Mike Rapoport <rppt@linux.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
||
|
Rafael Aquini
|
82edd9d52e |
mm/slab_common: provide "slab_merge" option for !IS_ENABLED(CONFIG_SLAB_MERGE_DEFAULT) builds
This is a minor addition to the allocator setup options to provide a simple way to on demand enable back cache merging for builds that by default run with CONFIG_SLAB_MERGE_DEFAULT not set. Link: https://lkml.kernel.org/r/20210319194506.200159-1-aquini@redhat.com Signed-off-by: Rafael Aquini <aquini@redhat.com> Cc: Christoph Lameter <cl@linux.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: David Rientjes <rientjes@google.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
||
|
Linus Torvalds
|
9d31d23389 |
Networking changes for 5.13.
Core:
- bpf:
- allow bpf programs calling kernel functions (initially to
reuse TCP congestion control implementations)
- enable task local storage for tracing programs - remove the
need to store per-task state in hash maps, and allow tracing
programs access to task local storage previously added for
BPF_LSM
- add bpf_for_each_map_elem() helper, allowing programs to
walk all map elements in a more robust and easier to verify
fashion
- sockmap: support UDP and cross-protocol BPF_SK_SKB_VERDICT
redirection
- lpm: add support for batched ops in LPM trie
- add BTF_KIND_FLOAT support - mostly to allow use of BTF
on s390 which has floats in its headers files
- improve BPF syscall documentation and extend the use of kdoc
parsing scripts we already employ for bpf-helpers
- libbpf, bpftool: support static linking of BPF ELF files
- improve support for encapsulation of L2 packets
- xdp: restructure redirect actions to avoid a runtime lookup,
improving performance by 4-8% in microbenchmarks
- xsk: build skb by page (aka generic zerocopy xmit) - improve
performance of software AF_XDP path by 33% for devices
which don't need headers in the linear skb part (e.g. virtio)
- nexthop: resilient next-hop groups - improve path stability
on next-hops group changes (incl. offload for mlxsw)
- ipv6: segment routing: add support for IPv4 decapsulation
- icmp: add support for RFC 8335 extended PROBE messages
- inet: use bigger hash table for IP ID generation
- tcp: deal better with delayed TX completions - make sure we don't
give up on fast TCP retransmissions only because driver is
slow in reporting that it completed transmitting the original
- tcp: reorder tcp_congestion_ops for better cache locality
- mptcp:
- add sockopt support for common TCP options
- add support for common TCP msg flags
- include multiple address ids in RM_ADDR
- add reset option support for resetting one subflow
- udp: GRO L4 improvements - improve 'forward' / 'frag_list'
co-existence with UDP tunnel GRO, allowing the first to take
place correctly even for encapsulated UDP traffic
- micro-optimize dev_gro_receive() and flow dissection, avoid
retpoline overhead on VLAN and TEB GRO
- use less memory for sysctls, add a new sysctl type, to allow using
u8 instead of "int" and "long" and shrink networking sysctls
- veth: allow GRO without XDP - this allows aggregating UDP
packets before handing them off to routing, bridge, OvS, etc.
- allow specifing ifindex when device is moved to another namespace
- netfilter:
- nft_socket: add support for cgroupsv2
- nftables: add catch-all set element - special element used
to define a default action in case normal lookup missed
- use net_generic infra in many modules to avoid allocating
per-ns memory unnecessarily
- xps: improve the xps handling to avoid potential out-of-bound
accesses and use-after-free when XPS change race with other
re-configuration under traffic
- add a config knob to turn off per-cpu netdev refcnt to catch
underflows in testing
Device APIs:
- add WWAN subsystem to organize the WWAN interfaces better and
hopefully start driving towards more unified and vendor-
-independent APIs
- ethtool:
- add interface for reading IEEE MIB stats (incl. mlx5 and
bnxt support)
- allow network drivers to dump arbitrary SFP EEPROM data,
current offset+length API was a poor fit for modern SFP
which define EEPROM in terms of pages (incl. mlx5 support)
- act_police, flow_offload: add support for packet-per-second
policing (incl. offload for nfp)
- psample: add additional metadata attributes like transit delay
for packets sampled from switch HW (and corresponding egress
and policy-based sampling in the mlxsw driver)
- dsa: improve support for sandwiched LAGs with bridge and DSA
- netfilter:
- flowtable: use direct xmit in topologies with IP
forwarding, bridging, vlans etc.
- nftables: counter hardware offload support
- Bluetooth:
- improvements for firmware download w/ Intel devices
- add support for reading AOSP vendor capabilities
- add support for virtio transport driver
- mac80211:
- allow concurrent monitor iface and ethernet rx decap
- set priority and queue mapping for injected frames
- phy: add support for Clause-45 PHY Loopback
- pci/iov: add sysfs MSI-X vector assignment interface
to distribute MSI-X resources to VFs (incl. mlx5 support)
New hardware/drivers:
- dsa: mv88e6xxx: add support for Marvell mv88e6393x -
11-port Ethernet switch with 8x 1-Gigabit Ethernet
and 3x 10-Gigabit interfaces.
- dsa: support for legacy Broadcom tags used on BCM5325, BCM5365
and BCM63xx switches
- Microchip KSZ8863 and KSZ8873; 3x 10/100Mbps Ethernet switches
- ath11k: support for QCN9074 a 802.11ax device
- Bluetooth: Broadcom BCM4330 and BMC4334
- phy: Marvell 88X2222 transceiver support
- mdio: add BCM6368 MDIO mux bus controller
- r8152: support RTL8153 and RTL8156 (USB Ethernet) chips
- mana: driver for Microsoft Azure Network Adapter (MANA)
- Actions Semi Owl Ethernet MAC
- can: driver for ETAS ES58X CAN/USB interfaces
Pure driver changes:
- add XDP support to: enetc, igc, stmmac
- add AF_XDP support to: stmmac
- virtio:
- page_to_skb() use build_skb when there's sufficient tailroom
(21% improvement for 1000B UDP frames)
- support XDP even without dedicated Tx queues - share the Tx
queues with the stack when necessary
- mlx5:
- flow rules: add support for mirroring with conntrack,
matching on ICMP, GTP, flex filters and more
- support packet sampling with flow offloads
- persist uplink representor netdev across eswitch mode
changes
- allow coexistence of CQE compression and HW time-stamping
- add ethtool extended link error state reporting
- ice, iavf: support flow filters, UDP Segmentation Offload
- dpaa2-switch:
- move the driver out of staging
- add spanning tree (STP) support
- add rx copybreak support
- add tc flower hardware offload on ingress traffic
- ionic:
- implement Rx page reuse
- support HW PTP time-stamping
- octeon: support TC hardware offloads - flower matching on ingress
and egress ratelimitting.
- stmmac:
- add RX frame steering based on VLAN priority in tc flower
- support frame preemption (FPE)
- intel: add cross time-stamping freq difference adjustment
- ocelot:
- support forwarding of MRP frames in HW
- support multiple bridges
- support PTP Sync one-step timestamping
- dsa: mv88e6xxx, dpaa2-switch: offload bridge port flags like
learning, flooding etc.
- ipa: add IPA v4.5, v4.9 and v4.11 support (Qualcomm SDX55, SM8350,
SC7280 SoCs)
- mt7601u: enable TDLS support
- mt76:
- add support for 802.3 rx frames (mt7915/mt7615)
- mt7915 flash pre-calibration support
- mt7921/mt7663 runtime power management fixes
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Merge tag 'net-next-5.13' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next
Pull networking updates from Jakub Kicinski:
"Core:
- bpf:
- allow bpf programs calling kernel functions (initially to
reuse TCP congestion control implementations)
- enable task local storage for tracing programs - remove the
need to store per-task state in hash maps, and allow tracing
programs access to task local storage previously added for
BPF_LSM
- add bpf_for_each_map_elem() helper, allowing programs to walk
all map elements in a more robust and easier to verify fashion
- sockmap: support UDP and cross-protocol BPF_SK_SKB_VERDICT
redirection
- lpm: add support for batched ops in LPM trie
- add BTF_KIND_FLOAT support - mostly to allow use of BTF on
s390 which has floats in its headers files
- improve BPF syscall documentation and extend the use of kdoc
parsing scripts we already employ for bpf-helpers
- libbpf, bpftool: support static linking of BPF ELF files
- improve support for encapsulation of L2 packets
- xdp: restructure redirect actions to avoid a runtime lookup,
improving performance by 4-8% in microbenchmarks
- xsk: build skb by page (aka generic zerocopy xmit) - improve
performance of software AF_XDP path by 33% for devices which don't
need headers in the linear skb part (e.g. virtio)
- nexthop: resilient next-hop groups - improve path stability on
next-hops group changes (incl. offload for mlxsw)
- ipv6: segment routing: add support for IPv4 decapsulation
- icmp: add support for RFC 8335 extended PROBE messages
- inet: use bigger hash table for IP ID generation
- tcp: deal better with delayed TX completions - make sure we don't
give up on fast TCP retransmissions only because driver is slow in
reporting that it completed transmitting the original
- tcp: reorder tcp_congestion_ops for better cache locality
- mptcp:
- add sockopt support for common TCP options
- add support for common TCP msg flags
- include multiple address ids in RM_ADDR
- add reset option support for resetting one subflow
- udp: GRO L4 improvements - improve 'forward' / 'frag_list'
co-existence with UDP tunnel GRO, allowing the first to take place
correctly even for encapsulated UDP traffic
- micro-optimize dev_gro_receive() and flow dissection, avoid
retpoline overhead on VLAN and TEB GRO
- use less memory for sysctls, add a new sysctl type, to allow using
u8 instead of "int" and "long" and shrink networking sysctls
- veth: allow GRO without XDP - this allows aggregating UDP packets
before handing them off to routing, bridge, OvS, etc.
- allow specifing ifindex when device is moved to another namespace
- netfilter:
- nft_socket: add support for cgroupsv2
- nftables: add catch-all set element - special element used to
define a default action in case normal lookup missed
- use net_generic infra in many modules to avoid allocating
per-ns memory unnecessarily
- xps: improve the xps handling to avoid potential out-of-bound
accesses and use-after-free when XPS change race with other
re-configuration under traffic
- add a config knob to turn off per-cpu netdev refcnt to catch
underflows in testing
Device APIs:
- add WWAN subsystem to organize the WWAN interfaces better and
hopefully start driving towards more unified and vendor-
independent APIs
- ethtool:
- add interface for reading IEEE MIB stats (incl. mlx5 and bnxt
support)
- allow network drivers to dump arbitrary SFP EEPROM data,
current offset+length API was a poor fit for modern SFP which
define EEPROM in terms of pages (incl. mlx5 support)
- act_police, flow_offload: add support for packet-per-second
policing (incl. offload for nfp)
- psample: add additional metadata attributes like transit delay for
packets sampled from switch HW (and corresponding egress and
policy-based sampling in the mlxsw driver)
- dsa: improve support for sandwiched LAGs with bridge and DSA
- netfilter:
- flowtable: use direct xmit in topologies with IP forwarding,
bridging, vlans etc.
- nftables: counter hardware offload support
- Bluetooth:
- improvements for firmware download w/ Intel devices
- add support for reading AOSP vendor capabilities
- add support for virtio transport driver
- mac80211:
- allow concurrent monitor iface and ethernet rx decap
- set priority and queue mapping for injected frames
- phy: add support for Clause-45 PHY Loopback
- pci/iov: add sysfs MSI-X vector assignment interface to distribute
MSI-X resources to VFs (incl. mlx5 support)
New hardware/drivers:
- dsa: mv88e6xxx: add support for Marvell mv88e6393x - 11-port
Ethernet switch with 8x 1-Gigabit Ethernet and 3x 10-Gigabit
interfaces.
- dsa: support for legacy Broadcom tags used on BCM5325, BCM5365 and
BCM63xx switches
- Microchip KSZ8863 and KSZ8873; 3x 10/100Mbps Ethernet switches
- ath11k: support for QCN9074 a 802.11ax device
- Bluetooth: Broadcom BCM4330 and BMC4334
- phy: Marvell 88X2222 transceiver support
- mdio: add BCM6368 MDIO mux bus controller
- r8152: support RTL8153 and RTL8156 (USB Ethernet) chips
- mana: driver for Microsoft Azure Network Adapter (MANA)
- Actions Semi Owl Ethernet MAC
- can: driver for ETAS ES58X CAN/USB interfaces
Pure driver changes:
- add XDP support to: enetc, igc, stmmac
- add AF_XDP support to: stmmac
- virtio:
- page_to_skb() use build_skb when there's sufficient tailroom
(21% improvement for 1000B UDP frames)
- support XDP even without dedicated Tx queues - share the Tx
queues with the stack when necessary
- mlx5:
- flow rules: add support for mirroring with conntrack, matching
on ICMP, GTP, flex filters and more
- support packet sampling with flow offloads
- persist uplink representor netdev across eswitch mode changes
- allow coexistence of CQE compression and HW time-stamping
- add ethtool extended link error state reporting
- ice, iavf: support flow filters, UDP Segmentation Offload
- dpaa2-switch:
- move the driver out of staging
- add spanning tree (STP) support
- add rx copybreak support
- add tc flower hardware offload on ingress traffic
- ionic:
- implement Rx page reuse
- support HW PTP time-stamping
- octeon: support TC hardware offloads - flower matching on ingress
and egress ratelimitting.
- stmmac:
- add RX frame steering based on VLAN priority in tc flower
- support frame preemption (FPE)
- intel: add cross time-stamping freq difference adjustment
- ocelot:
- support forwarding of MRP frames in HW
- support multiple bridges
- support PTP Sync one-step timestamping
- dsa: mv88e6xxx, dpaa2-switch: offload bridge port flags like
learning, flooding etc.
- ipa: add IPA v4.5, v4.9 and v4.11 support (Qualcomm SDX55, SM8350,
SC7280 SoCs)
- mt7601u: enable TDLS support
- mt76:
- add support for 802.3 rx frames (mt7915/mt7615)
- mt7915 flash pre-calibration support
- mt7921/mt7663 runtime power management fixes"
* tag 'net-next-5.13' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (2451 commits)
net: selftest: fix build issue if INET is disabled
net: netrom: nr_in: Remove redundant assignment to ns
net: tun: Remove redundant assignment to ret
net: phy: marvell: add downshift support for M88E1240
net: dsa: ksz: Make reg_mib_cnt a u8 as it never exceeds 255
net/sched: act_ct: Remove redundant ct get and check
icmp: standardize naming of RFC 8335 PROBE constants
bpf, selftests: Update array map tests for per-cpu batched ops
bpf: Add batched ops support for percpu array
bpf: Implement formatted output helpers with bstr_printf
seq_file: Add a seq_bprintf function
sfc: adjust efx->xdp_tx_queue_count with the real number of initialized queues
net:nfc:digital: Fix a double free in digital_tg_recv_dep_req
net: fix a concurrency bug in l2tp_tunnel_register()
net/smc: Remove redundant assignment to rc
mpls: Remove redundant assignment to err
llc2: Remove redundant assignment to rc
net/tls: Remove redundant initialization of record
rds: Remove redundant assignment to nr_sig
dt-bindings: net: mdio-gpio: add compatible for microchip,mdio-smi0
...
|
||
|
Linus Torvalds
|
d2b6f8a179 |
New code for 5.13:
- Various minor fixes in online scrub.
- Prevent metadata files from being automatically inactivated.
- Validate btree heights by the computed per-btree limits.
- Don't warn about remounting with deprecated mount options.
- Initialize attr forks at create time if we suspect we're going to need
to store them.
- Reduce memory reallocation workouts in the logging code.
- Fix some theoretical math calculation errors in logged buffers that
span multiple discontig memory ranges but contiguous ondisk regions.
- Speedups in dirty buffer bitmap handling.
- Make type verifier functions more inline-happy to reduce overhead.
- Reduce debug overhead in directory checking code.
- Many many typo fixes.
- Begin to handle the permanent loss of the very end of a filesystem.
- Fold struct xfs_icdinode into xfs_inode.
- Deprecate the long defunct BMV_IF_NO_DMAPI_READ from the bmapx ioctl.
- Remove a broken directory block format check from online scrub.
- Fix a bug where we could produce an unnecessarily tall data fork btree
when creating an attr fork.
- Fix scrub and readonly remounts racing.
- Fix a writeback ioend log deadlock problem by dropping the behavior
where we could preallocate a setfilesize transaction.
- Fix some bugs in the new extent count checking code.
- Fix some bugs in the attr fork preallocation code.
- Refactor if_flags out of the incore inode fork data structure.
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Merge tag 'xfs-5.13-merge-3' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux
Pull xfs updates from Darrick Wong:
"The notable user-visible addition this cycle is ability to remove
space from the last AG in a filesystem. This is the first of many
changes needed for full-fledged support for shrinking a filesystem.
Still needed are (a) the ability to reorganize files and metadata away
from the end of the fs; (b) the ability to remove entire allocation
groups; (c) shrink support for realtime volumes; and (d) thorough
testing of (a-c).
There are a number of performance improvements in this code drop: Dave
streamlined various parts of the buffer logging code and reduced the
cost of various debugging checks, and added the ability to pre-create
the xattr structures while creating files. Brian eliminated
transaction reservations that were being held across writeback (thus
reducing livelock potential.
Other random pieces: Pavel fixed the repetitve warnings about
deprecated mount options, I fixed online fsck to behave itself when a
readonly remount comes in during scrub, and refactored various other
parts of that code, Christoph contributed a lot of refactoring this
cycle. The xfs_icdinode structure has been absorbed into the (incore)
xfs_inode structure, and the format and flags handling around
xfs_inode_fork structures has been simplified. Chandan provided a
number of fixes for extent count overflow related problems that have
been shaken out by debugging knobs added during 5.12.
Summary:
- Various minor fixes in online scrub.
- Prevent metadata files from being automatically inactivated.
- Validate btree heights by the computed per-btree limits.
- Don't warn about remounting with deprecated mount options.
- Initialize attr forks at create time if we suspect we're going to
need to store them.
- Reduce memory reallocation workouts in the logging code.
- Fix some theoretical math calculation errors in logged buffers that
span multiple discontig memory ranges but contiguous ondisk
regions.
- Speedups in dirty buffer bitmap handling.
- Make type verifier functions more inline-happy to reduce overhead.
- Reduce debug overhead in directory checking code.
- Many many typo fixes.
- Begin to handle the permanent loss of the very end of a filesystem.
- Fold struct xfs_icdinode into xfs_inode.
- Deprecate the long defunct BMV_IF_NO_DMAPI_READ from the bmapx
ioctl.
- Remove a broken directory block format check from online scrub.
- Fix a bug where we could produce an unnecessarily tall data fork
btree when creating an attr fork.
- Fix scrub and readonly remounts racing.
- Fix a writeback ioend log deadlock problem by dropping the behavior
where we could preallocate a setfilesize transaction.
- Fix some bugs in the new extent count checking code.
- Fix some bugs in the attr fork preallocation code.
- Refactor if_flags out of the incore inode fork data structure"
* tag 'xfs-5.13-merge-3' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux: (77 commits)
xfs: remove xfs_quiesce_attr declaration
xfs: remove XFS_IFEXTENTS
xfs: remove XFS_IFINLINE
xfs: remove XFS_IFBROOT
xfs: only look at the fork format in xfs_idestroy_fork
xfs: simplify xfs_attr_remove_args
xfs: rename and simplify xfs_bmap_one_block
xfs: move the XFS_IFEXTENTS check into xfs_iread_extents
xfs: drop unnecessary setfilesize helper
xfs: drop unused ioend private merge and setfilesize code
xfs: open code ioend needs workqueue helper
xfs: drop submit side trans alloc for append ioends
xfs: fix return of uninitialized value in variable error
xfs: get rid of the ip parameter to xchk_setup_*
xfs: fix scrub and remount-ro protection when running scrub
xfs: move the check for post-EOF mappings into xfs_can_free_eofblocks
xfs: move the xfs_can_free_eofblocks call under the IOLOCK
xfs: precalculate default inode attribute offset
xfs: default attr fork size does not handle device inodes
xfs: inode fork allocation depends on XFS_IFEXTENT flag
...
|
||
|
Linus Torvalds
|
c05a182bf4 |
for-5.13/libata-2021-04-27
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Linus Torvalds
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16b3d0cf5b |
Scheduler updates for this cycle are:
- Clean up SCHED_DEBUG: move the decades old mess of sysctl, procfs and debugfs interfaces
to a unified debugfs interface.
- Signals: Allow caching one sigqueue object per task, to improve performance & latencies.
- Improve newidle_balance() irq-off latencies on systems with a large number of CPU cgroups.
- Improve energy-aware scheduling
- Improve the PELT metrics for certain workloads
- Reintroduce select_idle_smt() to improve load-balancing locality - but without the previous
regressions
- Add 'scheduler latency debugging': warn after long periods of pending need_resched. This
is an opt-in feature that requires the enabling of the LATENCY_WARN scheduler feature,
or the use of the resched_latency_warn_ms=xx boot parameter.
- CPU hotplug fixes for HP-rollback, and for the 'fail' interface. Fix remaining
balance_push() vs. hotplug holes/races
- PSI fixes, plus allow /proc/pressure/ files to be written by CAP_SYS_RESOURCE tasks as well
- Fix/improve various load-balancing corner cases vs. capacity margins
- Fix sched topology on systems with NUMA diameter of 3 or above
- Fix PF_KTHREAD vs to_kthread() race
- Minor rseq optimizations
- Misc cleanups, optimizations, fixes and smaller updates
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'sched-core-2021-04-28' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler updates from Ingo Molnar:
- Clean up SCHED_DEBUG: move the decades old mess of sysctl, procfs and
debugfs interfaces to a unified debugfs interface.
- Signals: Allow caching one sigqueue object per task, to improve
performance & latencies.
- Improve newidle_balance() irq-off latencies on systems with a large
number of CPU cgroups.
- Improve energy-aware scheduling
- Improve the PELT metrics for certain workloads
- Reintroduce select_idle_smt() to improve load-balancing locality -
but without the previous regressions
- Add 'scheduler latency debugging': warn after long periods of pending
need_resched. This is an opt-in feature that requires the enabling of
the LATENCY_WARN scheduler feature, or the use of the
resched_latency_warn_ms=xx boot parameter.
- CPU hotplug fixes for HP-rollback, and for the 'fail' interface. Fix
remaining balance_push() vs. hotplug holes/races
- PSI fixes, plus allow /proc/pressure/ files to be written by
CAP_SYS_RESOURCE tasks as well
- Fix/improve various load-balancing corner cases vs. capacity margins
- Fix sched topology on systems with NUMA diameter of 3 or above
- Fix PF_KTHREAD vs to_kthread() race
- Minor rseq optimizations
- Misc cleanups, optimizations, fixes and smaller updates
* tag 'sched-core-2021-04-28' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (61 commits)
cpumask/hotplug: Fix cpu_dying() state tracking
kthread: Fix PF_KTHREAD vs to_kthread() race
sched/debug: Fix cgroup_path[] serialization
sched,psi: Handle potential task count underflow bugs more gracefully
sched: Warn on long periods of pending need_resched
sched/fair: Move update_nohz_stats() to the CONFIG_NO_HZ_COMMON block to simplify the code & fix an unused function warning
sched/debug: Rename the sched_debug parameter to sched_verbose
sched,fair: Alternative sched_slice()
sched: Move /proc/sched_debug to debugfs
sched,debug: Convert sysctl sched_domains to debugfs
debugfs: Implement debugfs_create_str()
sched,preempt: Move preempt_dynamic to debug.c
sched: Move SCHED_DEBUG sysctl to debugfs
sched: Don't make LATENCYTOP select SCHED_DEBUG
sched: Remove sched_schedstats sysctl out from under SCHED_DEBUG
sched/numa: Allow runtime enabling/disabling of NUMA balance without SCHED_DEBUG
sched: Use cpu_dying() to fix balance_push vs hotplug-rollback
cpumask: Introduce DYING mask
cpumask: Make cpu_{online,possible,present,active}() inline
rseq: Optimise rseq_get_rseq_cs() and clear_rseq_cs()
...
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