Minchan Kim 1a4e58cce8 mm: introduce MADV_PAGEOUT ... When a process expects no accesses to a certain memory range for a long time, it could hint kernel that the pages can be reclaimed instantly but data should be preserved for future use. This could reduce workingset eviction so it ends up increasing performance. This patch introduces the new MADV_PAGEOUT hint to madvise(2) syscall. MADV_PAGEOUT can be used by a process to mark a memory range as not expected to be used for a long time so that kernel reclaims *any LRU* pages instantly. The hint can help kernel in deciding which pages to evict proactively. A note: It doesn't apply SWAP_CLUSTER_MAX LRU page isolation limit intentionally because it's automatically bounded by PMD size. If PMD size(e.g., 256) makes some trouble, we could fix it later by limit it to SWAP_CLUSTER_MAX[1]. - man-page material MADV_PAGEOUT (since Linux x.x) Do not expect access in the near future so pages in the specified regions could be reclaimed instantly regardless of memory pressure. Thus, access in the range after successful operation could cause major page fault but never lose the up-to-date contents unlike MADV_DONTNEED. Pages belonging to a shared mapping are only processed if a write access is allowed for the calling process. MADV_PAGEOUT cannot be applied to locked pages, Huge TLB pages, or VM_PFNMAP pages. [1] https://lore.kernel.org/lkml/20190710194719.GS29695@dhcp22.suse.cz/ [minchan@kernel.org: clear PG_active on MADV_PAGEOUT] Link: http://lkml.kernel.org/r/20190802200643.GA181880@google.com [akpm@linux-foundation.org: resolve conflicts with hmm.git] Link: http://lkml.kernel.org/r/20190726023435.214162-5-minchan@kernel.org Signed-off-by: Minchan Kim <minchan@kernel.org> Reported-by: kbuild test robot <lkp@intel.com> Acked-by: Michal Hocko <mhocko@suse.com> Cc: James E.J. Bottomley <James.Bottomley@HansenPartnership.com> Cc: Richard Henderson <rth@twiddle.net> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Chris Zankel <chris@zankel.net> Cc: Daniel Colascione <dancol@google.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Hillf Danton <hdanton@sina.com> Cc: Joel Fernandes (Google) <joel@joelfernandes.org> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Oleksandr Natalenko <oleksandr@redhat.com> Cc: Shakeel Butt <shakeelb@google.com> Cc: Sonny Rao <sonnyrao@google.com> Cc: Suren Baghdasaryan <surenb@google.com> Cc: Tim Murray <timmurray@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2019-09-25 17:51:41 -07:00
..
kasan	mm: introduce compound_nr()	2019-09-24 15:54:08 -07:00
backing-dev.c	writeback: Separate out wb_get_lookup() from wb_get_create()	2019-08-27 09:22:38 -06:00
balloon_compaction.c	mm/balloon_compaction: suppress allocation warnings	2019-09-04 07:42:01 -04:00
cleancache.c	Driver Core and debugfs changes for 5.3-rc1	2019-07-12 12:24:03 -07:00
cma_debug.c	mm/cma_debug.c: fix the break condition in cma_maxchunk_get()	2019-05-14 09:47:45 -07:00
cma.c	mm/cma.c: fail if fixed declaration can't be honored	2019-07-16 19:23:21 -07:00
cma.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
compaction.c	mm/compaction.c: remove unnecessary zone parameter in isolate_migratepages()	2019-09-24 15:54:10 -07:00
debug_page_ref.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
debug.c	mm: update references to page _refcount	2019-05-14 19:52:47 -07:00
dmapool.c	mm: security: introduce init_on_alloc=1 and init_on_free=1 boot options	2019-07-12 11:05:46 -07:00
early_ioremap.c	mm/early_ioremap: Fix boot hang with earlyprintk=efi,keep	2017-12-11 14:54:44 +01:00
fadvise.c	fs: Export generic_fadvise()	2019-08-30 22:43:58 -07:00
failslab.c	mm/failslab.c: by default, do not fail allocations with direct reclaim only	2019-07-12 11:05:43 -07:00
filemap.c	mm,thp: avoid writes to file with THP in pagecache	2019-09-24 15:54:11 -07:00
frame_vector.c	mm: untag user pointers in get_vaddr_frames	2019-09-25 17:51:41 -07:00
frontswap.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 482	2019-06-19 17:09:52 +02:00
gup_benchmark.c	mm/gup: replace get_user_pages_longterm() with FOLL_LONGTERM	2019-05-14 09:47:45 -07:00
gup.c	mm: untag user pointers in mm/gup.c	2019-09-25 17:51:41 -07:00
highmem.c	mm: convert totalram_pages and totalhigh_pages variables to atomic	2018-12-28 12:11:47 -08:00
hmm.c	pagewalk: separate function pointers from iterator data	2019-09-07 04:28:04 -03:00
huge_memory.c	mm: thp: make deferred split shrinker memcg aware	2019-09-24 15:54:11 -07:00
hugetlb_cgroup.c	mm: introduce compound_nr()	2019-09-24 15:54:08 -07:00
hugetlb.c	hugetlbfs: don't retry when pool page allocations start to fail	2019-09-24 15:54:10 -07:00
hwpoison-inject.c	hwpoison-inject: no need to check return value of debugfs_create functions	2019-06-03 15:39:40 +02:00
init-mm.c	mm: use CPU_BITS_NONE to initialize init_mm.cpu_bitmask	2019-09-24 15:54:10 -07:00
internal.h	mm: introduce MADV_COLD	2019-09-25 17:51:41 -07:00
interval_tree.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 248	2019-06-19 17:09:08 +02:00
Kconfig	mm,thp: add read-only THP support for (non-shmem) FS	2019-09-24 15:54:11 -07:00
Kconfig.debug	mm, page_owner, debug_pagealloc: save and dump freeing stack trace	2019-09-24 15:54:08 -07:00
khugepaged.c	khugepaged: enable collapse pmd for pte-mapped THP	2019-09-24 15:54:11 -07:00
kmemleak-test.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 333	2019-06-05 17:37:06 +02:00
kmemleak.c	mm/kmemleak.c: record the current memory pool size	2019-09-24 15:54:07 -07:00
ksm.c	mm: move memcmp_pages() and pages_identical()	2019-09-24 15:54:11 -07:00
list_lru.c	mm: memcg/slab: stop setting page->mem_cgroup pointer for slab pages	2019-07-12 11:05:44 -07:00
maccess.c	The main changes in this release include:	2019-07-18 11:51:00 -07:00
madvise.c	mm: introduce MADV_PAGEOUT	2019-09-25 17:51:41 -07:00
Makefile	mm: silence -Woverride-init/initializer-overrides	2019-09-24 15:54:10 -07:00
memblock.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152	2019-05-30 11:26:32 -07:00
memcontrol.c	memcg, kmem: do not fail __GFP_NOFAIL charges	2019-09-25 17:51:39 -07:00
memfd.c	mm: page cache: store only head pages in i_pages	2019-09-24 15:54:08 -07:00
memory_hotplug.c	mm/memory_hotplug.c: s/is/if	2019-09-24 15:54:09 -07:00
memory-failure.c	HMM patches for 5.3	2019-07-14 19:42:11 -07:00
memory.c	mm: do not hash address in print_bad_pte()	2019-09-24 15:54:09 -07:00
mempolicy.c	mm: untag user pointers passed to memory syscalls	2019-09-25 17:51:41 -07:00
mempool.c	docs/core-api/mm: fix return value descriptions in mm/	2019-03-05 21:07:20 -08:00
memremap.c	Merge branch 'odp_fixes' into hmm.git	2019-08-21 20:58:18 -03:00
memtest.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
migrate.c	mm: untag user pointers passed to memory syscalls	2019-09-25 17:51:41 -07:00
mincore.c	mm: untag user pointers passed to memory syscalls	2019-09-25 17:51:41 -07:00
mlock.c	mm: untag user pointers passed to memory syscalls	2019-09-25 17:51:41 -07:00
mm_init.c	treewide: Add SPDX license identifier for missed files	2019-05-21 10:50:45 +02:00
mmap.c	mm: untag user pointers in mmap/munmap/mremap/brk	2019-09-25 17:51:41 -07:00
mmu_context.c	sched/headers: Prepare to move the task_lock()/unlock() APIs to <linux/sched/task.h>	2017-03-02 08:42:38 +01:00
mmu_gather.c	mm: remove quicklist page table caches	2019-09-24 15:54:09 -07:00
mmu_notifier.c	mm, notifier: Catch sleeping/blocking for !blockable	2019-09-07 04:28:05 -03:00
mmzone.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
mprotect.c	mm: untag user pointers passed to memory syscalls	2019-09-25 17:51:41 -07:00
mremap.c	mm: untag user pointers in mmap/munmap/mremap/brk	2019-09-25 17:51:41 -07:00
msync.c	mm: untag user pointers passed to memory syscalls	2019-09-25 17:51:41 -07:00
nommu.c	mm: introduce page_size()	2019-09-24 15:54:08 -07:00
oom_kill.c	mm: introduce MADV_COLD	2019-09-25 17:51:41 -07:00
page_alloc.c	mm: move mem_cgroup_uncharge out of __page_cache_release()	2019-09-24 15:54:11 -07:00
page_counter.c	memcg: introduce memory.min	2018-06-07 17:34:36 -07:00
page_ext.c	mm, debug_pagealloc: use a page type instead of page_ext flag	2019-07-12 11:05:43 -07:00
page_idle.c	mm/page_idle.c: fix oops because end_pfn is larger than max_pfn	2019-06-29 16:43:45 +08:00
page_io.c	mm, swap: use rbtree for swap_extent	2019-07-12 11:05:43 -07:00
page_isolation.c	mm/page_isolation.c: change the prototype of undo_isolate_page_range()	2019-07-12 11:05:43 -07:00
page_owner.c	mm, page_owner, debug_pagealloc: save and dump freeing stack trace	2019-09-24 15:54:08 -07:00
page_poison.c	mm/page_poison.c: fix a typo in a comment	2019-09-24 15:54:08 -07:00
page_vma_mapped.c	mm: introduce page_size()	2019-09-24 15:54:08 -07:00
page-writeback.c	writeback, memcg: Implement foreign dirty flushing	2019-08-27 09:22:38 -06:00
pagewalk.c	pagewalk: use lockdep_assert_held for locking validation	2019-09-07 04:28:04 -03:00
percpu-internal.h	percpu: convert chunk hints to be based on pcpu_block_md	2019-03-13 12:25:31 -07:00
percpu-km.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 428	2019-06-05 17:37:16 +02:00
percpu-stats.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 428	2019-06-05 17:37:16 +02:00
percpu-vm.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 428	2019-06-05 17:37:16 +02:00
percpu.c	percpu: Use struct_size() helper	2019-09-04 13:40:49 -07:00
pgtable-generic.c	x86/mm: Page size aware flush_tlb_mm_range()	2018-10-09 16:51:11 +02:00
process_vm_access.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152	2019-05-30 11:26:32 -07:00
readahead.c	treewide: Add SPDX license identifier for missed files	2019-05-21 10:50:45 +02:00
rmap.c	mm,thp: add read-only THP support for (non-shmem) FS	2019-09-24 15:54:11 -07:00
rodata_test.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441	2019-06-05 17:37:17 +02:00
shmem.c	shmem: fix obsolete comment in shmem_getpage_gfp()	2019-09-24 15:54:12 -07:00
shuffle.c	mm: maintain randomization of page free lists	2019-05-14 19:52:48 -07:00
shuffle.h	mm: maintain randomization of page free lists	2019-05-14 19:52:48 -07:00
slab_common.c	mm, slab: extend slab/shrink to shrink all memcg caches	2019-09-24 15:54:07 -07:00
slab.c	mm: security: introduce init_on_alloc=1 and init_on_free=1 boot options	2019-07-12 11:05:46 -07:00
slab.h	mm, slab: move memcg_cache_params structure to mm/slab.h	2019-09-24 15:54:07 -07:00
slob.c	mm: introduce page_size()	2019-09-24 15:54:08 -07:00
slub.c	mm: introduce page_size()	2019-09-24 15:54:08 -07:00
sparse-vmemmap.c	mm/sparsemem: convert kmalloc_section_memmap() to populate_section_memmap()	2019-07-18 17:08:07 -07:00
sparse.c	mm/sparse.c: remove NULL check in clear_hwpoisoned_pages()	2019-09-24 15:54:09 -07:00
swap_cgroup.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
swap_slots.c	mm, swap, get_swap_pages: use entry_size instead of cluster in parameter	2018-08-22 10:52:44 -07:00
swap_state.c	mm: page cache: store only head pages in i_pages	2019-09-24 15:54:08 -07:00
swap.c	mm: introduce MADV_COLD	2019-09-25 17:51:41 -07:00
swapfile.c	vfs: don't allow writes to swap files	2019-08-20 07:55:16 -07:00
truncate.c	treewide: Add SPDX license identifier for missed files	2019-05-21 10:50:45 +02:00
usercopy.c	mm/usercopy: use memory range to be accessed for wraparound check	2019-08-13 16:06:52 -07:00
userfaultfd.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 499	2019-06-19 17:09:53 +02:00
util.c	arm64, mm: make randomization selected by generic topdown mmap layout	2019-09-24 15:54:11 -07:00
vmacache.c	mm: get rid of vmacache_flush_all() entirely	2018-09-13 15:18:04 -10:00
vmalloc.c	augmented rbtree: add new RB_DECLARE_CALLBACKS_MAX macro	2019-09-25 17:51:39 -07:00
vmpressure.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
vmscan.c	mm: introduce MADV_PAGEOUT	2019-09-25 17:51:41 -07:00
vmstat.c	mm,thp: stats for file backed THP	2019-09-24 15:54:11 -07:00
workingset.c	mm: workingset: fix vmstat counters for shadow nodes	2019-08-13 16:06:52 -07:00
z3fold.c	z3fold: fix memory leak in kmem cache	2019-09-24 15:54:10 -07:00
zbud.c	treewide: Add SPDX license identifier for more missed files	2019-05-21 10:50:45 +02:00
zpool.c	zpool: add malloc_support_movable to zpool_driver	2019-09-24 15:54:12 -07:00
zsmalloc.c	mm/zsmalloc.c: fix a -Wunused-function warning	2019-09-24 15:54:12 -07:00
zswap.c	zswap: do not map same object twice	2019-09-24 15:54:12 -07:00