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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
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bounce.c
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cleancache.c
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compaction.c
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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
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filemap_xip.c
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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
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ksm.c
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list_lru.c
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maccess.c
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madvise.c
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memblock.c
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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
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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
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mremap.c
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msync.c
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nobootmem.c
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nommu.c
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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
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page_cgroup.c
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page_io.c
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page_isolation.c
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pagewalk.c
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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
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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
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slab_common.c
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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
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swap.c mm: hugetlbfs: fix hugetlbfs optimization 2013-11-21 16:42:27 -08:00
swap_state.c
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swapfile.c
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truncate.c
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util.c
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vmalloc.c
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vmpressure.c
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vmscan.c
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vmstat.c
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zbud.c
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zswap.c
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