Johannes Weiner 70686d82af mm: memcontrol: fix occasional OOMs due to proportional memory.low reclaim ... [ Upstream commit f56ce412a59d7d938b81de8878faef128812482c ] We've noticed occasional OOM killing when memory.low settings are in effect for cgroups. This is unexpected and undesirable as memory.low is supposed to express non-OOMing memory priorities between cgroups. The reason for this is proportional memory.low reclaim. When cgroups are below their memory.low threshold, reclaim passes them over in the first round, and then retries if it couldn't find pages anywhere else. But when cgroups are slightly above their memory.low setting, page scan force is scaled down and diminished in proportion to the overage, to the point where it can cause reclaim to fail as well - only in that case we currently don't retry, and instead trigger OOM. To fix this, hook proportional reclaim into the same retry logic we have in place for when cgroups are skipped entirely. This way if reclaim fails and some cgroups were scanned with diminished pressure, we'll try another full-force cycle before giving up and OOMing. [akpm@linux-foundation.org: coding-style fixes] Link: https://lkml.kernel.org/r/20210817180506.220056-1-hannes@cmpxchg.org Fixes: 9783aa9917 ("mm, memcg: proportional memory.{low,min} reclaim") Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Reported-by: Leon Yang <lnyng@fb.com> Reviewed-by: Rik van Riel <riel@surriel.com> Reviewed-by: Shakeel Butt <shakeelb@google.com> Acked-by: Roman Gushchin <guro@fb.com> Acked-by: Chris Down <chris@chrisdown.name> Acked-by: Michal Hocko <mhocko@suse.com> Cc: <stable@vger.kernel.org> [5.4+] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		2024-07-05 18:56:00 +02:00
..
kasan	kasan: fix incorrect arguments passing in kasan_add_zero_shadow	2021-01-27 11:55:23 +01:00
backing-dev.c
balloon_compaction.c
cleancache.c
cma_debug.c
cma.c	init: add dsm gpl source	2024-07-05 18:00:04 +02:00
cma.h
compaction.c	init: add dsm gpl source	2024-07-05 18:00:04 +02:00
debug_page_ref.c
debug_vm_pgtable.c	mm/debug_vm_pgtable: ensure THP availability via has_transparent_hugepage()	2021-07-14 16:56:13 +02:00
debug.c	mm, dump_page: rename head_mapcount() --> head_compound_mapcount()	2020-10-13 18:38:29 -07:00
dmapool.c	mm/dmapool.c: replace hard coded function name with __func__	2020-10-13 18:38:32 -07:00
early_ioremap.c
fadvise.c	mm, fadvise: improve the expensive remote LRU cache draining after FADV_DONTNEED	2020-10-13 18:38:29 -07:00
failslab.c
filemap.c	init: add dsm gpl source	2024-07-05 18:00:04 +02:00
frame_vector.c
frontswap.c
gup_benchmark.c	mm/gup_benchmark: take the mmap lock around GUP	2020-10-18 09:27:09 -07:00
gup.c	mm/gup: fix try_grab_compound_head() race with split_huge_page()	2021-07-14 16:55:42 +02:00
highmem.c	mm/highmem.c: clean up endif comments	2020-10-16 11:11:18 -07:00
hmm.c
huge_memory.c	mm/userfaultfd: fix uffd-wp special cases for fork()	2021-07-25 14:36:18 +02:00
hugetlb_cgroup.c	hugetlb_cgroup: fix imbalanced css_get and css_put pair for shared mappings	2021-03-30 14:31:54 +02:00
hugetlb.c	hugetlb: remove prep_compound_huge_page cleanup	2021-07-14 16:56:51 +02:00
hwpoison-inject.c	mm,hwpoison-inject: don't pin for hwpoison_filter	2020-10-16 11:11:16 -07:00
init-mm.c	mm/gup: prevent gup_fast from racing with COW during fork	2020-12-30 11:53:54 +01:00
internal.h	mm/thp: fix vma_address() if virtual address below file offset	2021-06-30 08:47:27 -04:00
interval_tree.c
ioremap.c
Kconfig	init: add dsm gpl source	2024-07-05 18:00:04 +02:00
Kconfig.debug
khugepaged.c	mm/huge_memory.c: add missing read-only THP checking in transparent_hugepage_enabled()	2021-07-14 16:56:50 +02:00
kmemleak.c	mm/kmemleak: rely on rcu for task stack scanning	2020-10-13 18:38:27 -07:00
ksm.c	ksm: fix potential missing rmap_item for stable_node	2021-05-19 10:13:07 +02:00
list_lru.c	mm: list_lru: set shrinker map bit when child nr_items is not zero	2020-12-06 10:19:07 -08:00
maccess.c
madvise.c	mm/madvise: replace ptrace attach requirement for process_madvise	2021-03-17 17:06:37 +01:00
Makefile	init: add dsm gpl source	2024-07-05 18:00:04 +02:00
mapping_dirty_helpers.c
memblock.c	memblock: make for_each_mem_range() traverse MEMBLOCK_HOTPLUG regions	2021-07-28 14:35:46 +02:00
memcontrol.c	mm: memcg/slab: properly set up gfp flags for objcg pointer array	2021-07-14 16:56:14 +02:00
memfd.c
memory_hotplug.c	arm64: mte: Map hotplugged memory as Normal Tagged	2021-03-17 17:06:28 +01:00
memory-failure.c	mm,hwpoison: return -EBUSY when migration fails	2021-07-19 09:44:56 +02:00
memory.c	mm/userfaultfd: fix uffd-wp special cases for fork()	2021-07-25 14:36:18 +02:00
mempolicy.c	mm: mempolicy: fix potential pte_unmap_unlock pte error	2020-11-02 12:14:19 -08:00
mempool.c	mm/mempool: add 'else' to split mutually exclusive case	2020-10-13 18:38:34 -07:00
memremap.c	mm: fix memory_failure() handling of dax-namespace metadata	2021-03-04 11:38:21 +01:00
memtest.c
migrate.c	mm, thp: use head page in __migration_entry_wait()	2021-06-30 08:47:26 -04:00
mincore.c	mm: factor find_get_incore_page out of mincore_page	2020-10-13 18:38:29 -07:00
mlock.c
mm_init.c
mmap.c	init: add dsm gpl source	2024-07-05 18:00:04 +02:00
mmu_gather.c
mmu_notifier.c	mm/mmu_notifiers: ensure range_end() is paired with range_start()	2021-03-30 14:32:06 +02:00
mmzone.c
mprotect.c
mremap.c	init: add dsm gpl source	2024-07-05 18:00:04 +02:00
msync.c
nommu.c	init: add dsm gpl source	2024-07-05 18:00:04 +02:00
oom_kill.c	init: add dsm gpl source	2024-07-05 18:00:04 +02:00
page_alloc.c	init: add dsm gpl source	2024-07-05 18:00:04 +02:00
page_counter.c	mm/page_counter: correct the obsolete func name in the comment of page_counter_try_charge()	2020-10-13 18:38:30 -07:00
page_ext.c
page_idle.c
page_io.c	swap: fix swapfile read/write offset	2021-03-07 12:34:15 +01:00
page_isolation.c	mm: rename page_order() to buddy_order()	2020-10-16 11:11:19 -07:00
page_owner.c	mm: rename page_order() to buddy_order()	2020-10-16 11:11:19 -07:00
page_poison.c	mm/page_poison.c: replace bool variable with static key	2020-10-16 11:11:17 -07:00
page_reporting.c	mm: rename page_order() to buddy_order()	2020-10-16 11:11:19 -07:00
page_reporting.h
page_vma_mapped.c	mm/thp: another PVMW_SYNC fix in page_vma_mapped_walk()	2021-06-30 08:47:29 -04:00
page-writeback.c	init: add dsm gpl source	2024-07-05 18:00:04 +02:00
pagewalk.c
percpu-internal.h	percpu: make pcpu_nr_empty_pop_pages per chunk type	2021-04-14 08:42:03 +02:00
percpu-km.c
percpu-stats.c	percpu: make pcpu_nr_empty_pop_pages per chunk type	2021-04-14 08:42:03 +02:00
percpu-vm.c
percpu.c	percpu: make pcpu_nr_empty_pop_pages per chunk type	2021-04-14 08:42:03 +02:00
pgalloc-track.h
pgtable-generic.c	mm/thp: fix __split_huge_pmd_locked() on shmem migration entry	2021-06-30 08:47:26 -04:00
prfile.c	init: add dsm gpl source	2024-07-05 18:00:04 +02:00
process_vm_access.c	mm/process_vm_access.c: include compat.h	2021-01-19 18:27:21 +01:00
ptdump.c	mm: ptdump: fix build failure	2021-04-21 13:00:57 +02:00
readahead.c	mm: use limited read-ahead to satisfy read	2020-10-17 13:49:08 -06:00
rmap.c	init: add dsm gpl source	2024-07-05 18:00:04 +02:00
rodata_test.c
shmem.c	init: add dsm gpl source	2024-07-05 18:00:04 +02:00
shuffle.c	mm: rename page_order() to buddy_order()	2020-10-16 11:11:19 -07:00
shuffle.h
slab_common.c	mm/slub: fix redzoning for small allocations	2021-06-23 14:42:54 +02:00
slab.c	mm/sl?b.c: remove ctor argument from kmem_cache_flags	2021-05-14 09:50:45 +02:00
slab.h	mm: memcg/slab: properly set up gfp flags for objcg pointer array	2021-07-14 16:56:14 +02:00
slob.c
slub.c	mm/slub.c: include swab.h	2021-06-23 14:42:54 +02:00
sparse-vmemmap.c
sparse.c	mm/sparse: add the missing sparse_buffer_fini() in error branch	2021-05-14 09:50:45 +02:00
swap_cgroup.c
swap_slots.c	mm/swap_slots.c: remove always zero and unused return value of enable_swap_slots_cache()	2020-10-13 18:38:30 -07:00
swap_state.c	mm: fix some broken comments	2020-10-16 11:11:19 -07:00
swap.c	mm: move call to compound_head() in release_pages()	2020-10-13 18:38:33 -07:00
swapfile.c	init: add dsm gpl source	2024-07-05 18:00:04 +02:00
truncate.c	mm/thp: unmap_mapping_page() to fix THP truncate_cleanup_page()	2021-06-30 08:47:27 -04:00
usercopy.c
userfaultfd.c
util.c	init: add dsm gpl source	2024-07-05 18:00:04 +02:00
vmacache.c
vmalloc.c	mm/vmalloc.c: fix potential memory leak	2021-01-19 18:27:21 +01:00
vmpressure.c
vmscan.c	mm: memcontrol: fix occasional OOMs due to proportional memory.low reclaim	2024-07-05 18:56:00 +02:00
vmstat.c	mm/vmstat.c: use helper macro abs()	2020-10-16 11:11:17 -07:00
workingset.c	XArray updates for 5.9	2020-10-20 14:39:37 -07:00
z3fold.c	mm/z3fold: use release_z3fold_page_locked() to release locked z3fold page	2021-07-14 16:56:51 +02:00
zbud.c	mm/zbud: remove redundant initialization	2020-10-13 18:38:34 -07:00
zpool.c
zsmalloc.c	zsmalloc: account the number of compacted pages correctly	2021-03-07 12:34:15 +01:00
zswap.c