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Johannes Weiner 1f14c1ac19 mm: memcg: do not allow task about to OOM kill to bypass the limit 
Commit 4942642080 ("mm: memcg: handle non-error OOM situations more
gracefully") allowed tasks that already entered a memcg OOM condition to
bypass the memcg limit on subsequent allocation attempts hoping this
would expedite finishing the page fault and executing the kill.

David Rientjes is worried that this breaks memcg isolation guarantees
and since there is no evidence that the bypass actually speeds up fault
processing just change it so that these subsequent charge attempts fail
outright.  The notable exception being __GFP_NOFAIL charges which are
required to bypass the limit regardless.

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Reported-by: David Rientjes <rientjes@google.com>
Acked-by: Michal Hocko <mhocko@suse.cz>
Acked-bt: David Rientjes <rientjes@google.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 		2013-12-12 18:19:26 -08:00
..
Kconfig Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2013-11-15 16:47:22 -08:00
Kconfig.debug
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Makefile
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backing-dev.c
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balloon_compaction.c
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bootmem.c mm/bootmem.c: remove unused local `map' 2013-11-13 12:09:09 +09:00
bounce.c
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cleancache.c
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compaction.c mm/compaction.c: update comment about zone lock in isolate_freepages_block 2013-11-13 12:09:03 +09:00
debug-pagealloc.c
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dmapool.c
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fadvise.c
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failslab.c
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filemap.c mm: drop actor argument of do_generic_file_read() 2013-11-15 09:32:13 +09:00
filemap_xip.c seqcount: Add lockdep functionality to seqcount/seqlock structures 2013-11-06 12:40:26 +01:00
fremap.c
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frontswap.c
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highmem.c
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huge_memory.c thp: move preallocated PTE page table on move_huge_pmd() 2013-12-12 18:19:26 -08:00
hugetlb.c mm: hugetlbfs: fix hugetlbfs optimization 2013-11-21 16:42:27 -08:00
hugetlb_cgroup.c
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hwpoison-inject.c
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init-mm.c
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internal.h
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interval_tree.c
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kmemcheck.c
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kmemleak-test.c
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kmemleak.c mm: kmemleak: avoid false negatives on vmalloc'ed objects 2013-11-13 12:09:07 +09:00
ksm.c ksm: remove redundant __GFP_ZERO from kcalloc 2013-11-13 12:09:02 +09:00
list_lru.c mm: list_lru: fix almost infinite loop causing effective livelock 2013-10-30 12:57:46 -07:00
maccess.c
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madvise.c
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memblock.c mm/memblock.c: introduce bottom-up allocation mode 2013-11-13 12:09:08 +09:00
memcontrol.c mm: memcg: do not allow task about to OOM kill to bypass the limit 2013-12-12 18:19:26 -08:00
memory-failure.c kfifo API type safety 2013-11-15 09:32:23 +09:00
memory.c Revert "mm: create a separate slab for page->ptl allocation" 2013-11-20 14:41:47 -08:00
memory_hotplug.c mem-hotplug: introduce movable_node boot option 2013-11-13 12:09:09 +09:00
mempolicy.c mm, mempolicy: silence gcc warning 2013-11-21 16:42:27 -08:00
mempool.c
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migrate.c mm: thp: give transparent hugepage code a separate copy_page 2013-11-21 16:42:27 -08:00
mincore.c
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mlock.c
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mm_init.c
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mmap.c mm: convert mm->nr_ptes to atomic_long_t 2013-11-15 09:32:14 +09:00
mmu_context.c
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mmu_notifier.c
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mmzone.c
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mprotect.c mm: numa: return the number of base pages altered by protection changes 2013-11-13 12:09:11 +09:00
mremap.c
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msync.c
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nobootmem.c mm/nobootmem.c: have __free_pages_memory() free in larger chunks. 2013-11-13 12:09:04 +09:00
nommu.c Merge branch 'akpm' (patches from Andrew Morton) 2013-11-13 15:45:43 +09:00
oom_kill.c mm: convert mm->nr_ptes to atomic_long_t 2013-11-15 09:32:14 +09:00
page-writeback.c
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page_alloc.c mm/page_alloc.c: fix comment in zlc_setup() 2013-11-13 12:09:11 +09:00
page_cgroup.c
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page_io.c
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page_isolation.c
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pagewalk.c mm/pagewalk.c: fix walk_page_range() access of wrong PTEs 2013-10-30 14:27:03 -07:00
percpu-km.c
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percpu-vm.c
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percpu.c
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pgtable-generic.c mm: convert the rest to new page table lock api 2013-11-15 09:32:15 +09:00
process_vm_access.c
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quicklist.c
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readahead.c readahead: fix sequential read cache miss detection 2013-11-13 12:09:09 +09:00
rmap.c mm, hugetlb: convert hugetlbfs to use split pmd lock 2013-11-15 09:32:14 +09:00
shmem.c security: shmem: implement kernel private shmem inodes 2013-12-02 11:24:19 +00:00
slab.c Merge branch 'slab/next' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/linux 2013-11-22 08:10:34 -08:00
slab.h memcg, kmem: rename cache_from_memcg to cache_from_memcg_idx 2013-11-13 12:09:10 +09:00
slab_common.c memcg, kmem: rename cache_from_memcg to cache_from_memcg_idx 2013-11-13 12:09:10 +09:00
slob.c
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slub.c Merge branch 'slab/next' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/linux 2013-11-22 08:10:34 -08:00
sparse-vmemmap.c
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sparse.c mm/sparsemem: fix a bug in free_map_bootmem when CONFIG_SPARSEMEM_VMEMMAP 2013-11-13 12:09:06 +09:00
swap.c mm: hugetlbfs: fix hugetlbfs optimization 2013-11-21 16:42:27 -08:00
swap_state.c
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swapfile.c frontswap: enable call to invalidate area on swapoff 2013-11-13 12:09:07 +09:00
truncate.c
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util.c mm: factor commit limit calculation 2013-11-13 12:09:11 +09:00
vmalloc.c mm: kmemleak: avoid false negatives on vmalloc'ed objects 2013-11-13 12:09:07 +09:00
vmpressure.c
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vmscan.c
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vmstat.c mm: numa: return the number of base pages altered by protection changes 2013-11-13 12:09:11 +09:00
zbud.c
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zswap.c mm/zswap: refactor the get/put routines 2013-11-13 12:09:11 +09:00