Yang Shi b265cdebdf sched: coredump.h: clarify the use of MMF_VM_HUGEPAGE ... Patch series "Make khugepaged collapse readonly FS THP more consistent", v4. The readonly FS THP relies on khugepaged to collapse THP for suitable vmas. But the behavior is inconsistent for "always" mode (https://lore.kernel.org/linux-mm/00f195d4-d039-3cf2-d3a1-a2c88de397a0@suse.cz/). The "always" mode means THP allocation should be tried all the time and khugepaged should try to collapse THP all the time. Of course the allocation and collapse may fail due to other factors and conditions. Currently file THP may not be collapsed by khugepaged even though all the conditions are met. That does break the semantics of "always" mode. So make sure readonly FS vmas are registered to khugepaged to fix the break. Register suitable vmas in common mmap path, that could cover both readonly FS vmas and shmem vmas, so remove the khugepaged calls in shmem.c. The patch 1-7 are minor bug fixes, clean up and preparation patches. Patch 8 is the real meat. Tested with khugepaged test in selftests and the testcase provided by Vlastimil Babka in https://lore.kernel.org/lkml/df3b5d1c-a36b-2c73-3e27-99e74983de3a@suse.cz/ by commenting out MADV_HUGEPAGE call. This patch (of 8): MMF_VM_HUGEPAGE is set as long as the mm is available for khugepaged by khugepaged_enter(), not only when VM_HUGEPAGE is set on vma. Correct the comment to avoid confusion. Link: https://lkml.kernel.org/r/20220510203222.24246-1-shy828301@gmail.com Link: https://lkml.kernel.org/r/20220510203222.24246-2-shy828301@gmail.com Signed-off-by: Yang Shi <shy828301@gmail.com> Reviewed-by: Miaohe Lin <linmiaohe@huawei.com> Acked-by: Song Liu <song@kernel.org> Acked-by: Vlastmil Babka <vbabka@suse.cz> Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Matthew Wilcox (Oracle) <willy@infradead.org> Cc: Rik van Riel <riel@surriel.com> Cc: Song Liu <songliubraving@fb.com> Cc: Theodore Ts'o <tytso@mit.edu> Cc: Zi Yan <ziy@nvidia.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>		2022-05-19 14:08:48 -07:00
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affinity.h	sched/headers: Add initial new headers as identity mappings	2022-02-23 10:58:28 +01:00
autogroup.h
clock.h
cond_resched.h	sched/headers: Add initial new headers as identity mappings	2022-02-23 10:58:28 +01:00
coredump.h	sched: coredump.h: clarify the use of MMF_VM_HUGEPAGE	2022-05-19 14:08:48 -07:00
cpufreq.h
cputime.h
deadline.h	sched/headers: Make the <linux/sched/deadline.h> header build standalone	2022-02-23 10:58:33 +01:00
debug.h
hotplug.h
idle.h
init.h
isolation.h	sched/isolation: Use single feature type while referring to housekeeping cpumask	2022-02-16 15:57:55 +01:00
jobctl.h
loadavg.h
mm.h	mm, hugetlb: allow for "high" userspace addresses	2022-04-21 20:01:09 -07:00
nohz.h
numa_balancing.h
posix-timers.h	sched/headers: Add initial new headers as identity mappings	2022-02-23 10:58:28 +01:00
prio.h
rseq_api.h	sched/headers: Add initial new headers as identity mappings	2022-02-23 10:58:28 +01:00
rt.h
sd_flags.h
signal.h	signal: Move set_notify_signal and clear_notify_signal into sched/signal.h	2022-03-10 16:51:50 -06:00
smt.h
stat.h
sysctl.h	Merge branch 'akpm' (patches from Andrew)	2022-03-22 16:11:53 -07:00
task_flags.h	sched/headers: Add initial new headers as identity mappings	2022-02-23 10:58:28 +01:00
task_stack.h	fork: Move task stack accounting to do_exit()	2022-02-22 22:25:02 +01:00
task.h	exit: Mark do_group_exit() __noreturn	2022-03-15 10:32:43 +01:00
thread_info_api.h	sched/headers: Add initial new headers as identity mappings	2022-02-23 10:58:28 +01:00
topology.h	sched/fair: Adjust the allowed NUMA imbalance when SD_NUMA spans multiple LLCs	2022-02-11 23:30:08 +01:00
types.h
user.h
wake_q.h
xacct.h