Keqian Zhu c862626e19 KVM: arm64: Support enabling dirty log gradually in small chunks ... There is already support of enabling dirty log gradually in small chunks for x86 in commit 3c9bd4006b ("KVM: x86: enable dirty log gradually in small chunks"). This adds support for arm64. x86 still writes protect all huge pages when DIRTY_LOG_INITIALLY_ALL_SET is enabled. However, for arm64, both huge pages and normal pages can be write protected gradually by userspace. Under the Huawei Kunpeng 920 2.6GHz platform, I did some tests on 128G Linux VMs with different page size. The memory pressure is 127G in each case. The time taken of memory_global_dirty_log_start in QEMU is listed below: Page Size Before After Optimization 4K 650ms 1.8ms 2M 4ms 1.8ms 1G 2ms 1.8ms Besides the time reduction, the biggest improvement is that we will minimize the performance side effect (because of dissolving huge pages and marking memslots dirty) on guest after enabling dirty log. Signed-off-by: Keqian Zhu <zhukeqian1@huawei.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20200413122023.52583-1-zhukeqian1@huawei.com		2020-05-16 15:05:02 +01:00
..
ABI	change email address for Pali Rohár	2020-04-10 15:36:22 -07:00
accounting
admin-guide	- Document DM integrity allow_discard feature that was added during	2020-04-30 16:45:08 -07:00
arm
arm64	Documentation: arm64: fix amu.rst doc warnings	2020-04-23 17:05:22 +01:00
block	block: Document genhd capability flags	2020-03-12 07:47:22 -06:00
bpf	bpf: lsm: Add Documentation	2020-03-30 01:35:12 +02:00
cdrom
core-api	docs: timekeeping: Use correct prototype for deprecated functions	2020-04-15 14:48:26 -06:00
cpu-freq
crypto
dev-tools	linux-kselftest-kunit-5.7-rc1	2020-04-01 16:11:40 -07:00
devicetree	dmaengine fixes for v5.7-rc4	2020-05-02 11:16:14 -07:00
doc-guide
driver-api	A handful of late-arriving fixes for the documentation tree.	2020-04-10 17:53:43 -07:00
fault-injection
fb
features
filesystems	debugfs: remove return value of debugfs_create_u32()	2020-04-17 17:08:50 +02:00
firmware_class
firmware-guide	Documentation: firmware-guide: ACPI: fix table alignment in namespace.rst	2020-04-08 14:27:48 +02:00
fpga
gpu	UAPI Changes:	2020-03-19 10:40:27 +10:00
hid
hwmon	hwmon: (pmbus/isl68137) Fix up chip IDs	2020-04-12 15:12:51 -07:00
i2c	i2c: convert SMBus alert setup function to return an ERRPTR	2020-03-10 12:19:52 +01:00
ia64
ide
iio
infiniband
input
isdn
kbuild	Documentation: kbuild: fix the section title format	2020-04-23 10:53:19 +09:00
kernel-hacking	docs: locking: Drop :c:func: throughout	2020-03-20 17:16:24 -06:00
leds
livepatch
locking	Documentation/locking/locktypes: Minor copy editor fixes	2020-03-28 12:47:34 +01:00
m68k
maintainer
media	media updates for v5.7-rc1	2020-03-30 13:42:05 -07:00
mhi	docs: Add documentation for MHI bus	2020-03-19 07:41:04 +01:00
mips	docs: mips: remove no longer needed au1xxx_ide.rst documentation	2020-03-24 15:53:48 +01:00
misc-devices	Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6	2020-04-01 14:47:40 -07:00
netlabel
networking	ice: cleanup language in ice.rst for fw.app	2020-05-01 15:30:24 -07:00
nios2
nvdimm
openrisc
parisc
PCI	pci-v5.7-changes	2020-04-03 14:25:02 -07:00
pcmcia
power	Merge branches 'pm-core', 'pm-sleep', 'pm-acpi' and 'pm-domains'	2020-03-30 14:46:58 +02:00
powerpc	powerpc updates for 5.7	2020-04-05 11:12:59 -07:00
process	Documentation/changes: Raise minimum supported binutils version to 2.23	2020-04-09 00:02:00 +09:00
RCU
riscv
s390
scheduler
scsi	SCSI misc on 20200402	2020-04-02 17:03:53 -07:00
security	docs: prevent warnings due to autosectionlabel	2020-03-20 17:01:29 -06:00
sh
sound	ALSA: hda/realtek - Remove now-unnecessary XPS 13 headphone noise fixups	2020-03-31 10:54:06 +02:00
sparc
sphinx
sphinx-static
spi
target	docs: prevent warnings due to autosectionlabel	2020-03-20 17:01:29 -06:00
timers
trace	New tracing features:	2020-04-05 10:36:18 -07:00
translations	media updates for v5.7-rc1	2020-03-30 13:42:05 -07:00
usb	usb: gadget: add raw-gadget interface	2020-03-15 11:34:48 +02:00
userspace-api
virt	KVM: arm64: Support enabling dirty log gradually in small chunks	2020-05-16 15:05:02 +01:00
vm	mm/zswap: allow setting default status, compressor and allocator in Kconfig	2020-04-07 10:43:41 -07:00
w1
watchdog
x86	Documentation/x86, efi/x86: Clarify EFI handover protocol and its requirements	2020-04-14 08:32:15 +02:00
xtensa
.gitignore	.gitignore: add SPDX License Identifier	2020-03-25 11:50:48 +01:00
asm-annotations.rst
atomic_bitops.txt
atomic_t.txt
bus-virt-phys-mapping.txt
Changes
CodingStyle
conf.py	docs: conf.py: avoid thousands of duplicate label warning on Sphinx	2020-03-20 17:01:34 -06:00
COPYING-logo
crc32.txt
debugging-via-ohci1394.txt
digsig.txt
DMA-API-HOWTO.txt
DMA-API.txt
DMA-attributes.txt
DMA-ISA-LPC.txt
docutils.conf
dontdiff
futex-requeue-pi.txt
hwspinlock.txt
index.rst	Char/Misc driver patches for 5.7-rc1	2020-04-03 13:22:40 -07:00
IPMI.txt
IRQ-affinity.txt
IRQ-domain.txt
IRQ.txt
irqflags-tracing.txt
Kconfig
kprobes.txt
kref.txt
logo.gif
lzo.txt
mailbox.txt
Makefile	Kbuild updates for v5.7	2020-03-31 16:03:39 -07:00
memory-barriers.txt
nommu-mmap.txt
percpu-rw-semaphore.txt
pi-futex.txt
preempt-locking.txt
rbtree.txt
remoteproc.txt	remoteproc: Add elf64 support in elf loader	2020-03-25 22:29:40 -07:00
robust-futex-ABI.txt	threads: Update PID limit comment according to futex UAPI change	2020-03-21 17:48:13 +01:00
robust-futexes.txt
rpmsg.txt
speculation.txt
static-keys.txt
SubmittingPatches
tee.txt
this_cpu_ops.txt
unaligned-memory-access.txt
xz.txt