Oleg Nesterov 84416db676 oom: task->mm == NULL doesn't mean the memory was freed ...

commit c027a474a6 upstream.

exit_mm() sets ->mm == NULL then it does mmput()->exit_mmap() which
frees the memory.

However select_bad_process() checks ->mm != NULL before TIF_MEMDIE,
so it continues to kill other tasks even if we have the oom-killed
task freeing its memory.

Change select_bad_process() to check ->mm after TIF_MEMDIE, but skip
the tasks which have already passed exit_notify() to ensure a zombie
with TIF_MEMDIE set can't block oom-killer. Alternatively we could
probably clear TIF_MEMDIE after exit_mmap().

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

2011-08-04 21:58:42 -07:00

..

backing-dev.c

mm/backing-dev.c: reset bdi min_ratio in bdi_unregister()

2011-08-04 21:58:39 -07:00

bootmem.c

…

bounce.c

…

cleancache.c

mm: cleancache core ops functions and config

2011-05-26 10:01:36 -06:00

compaction.c

mm: compaction: abort compaction if too many pages are isolated and caller is asynchronous V2

2011-06-15 20:04:02 -07:00

debug-pagealloc.c

…

dmapool.c

…

fadvise.c

…

failslab.c

…

filemap_xip.c

mm: Convert i_mmap_lock to a mutex

2011-05-25 08:39:18 -07:00

filemap.c

more conservative S_NOSEC handling

2011-06-03 18:24:58 -04:00

fremap.c

mm: don't access vm_flags as 'int'

2011-05-26 09:20:31 -07:00

highmem.c

…

huge_memory.c

mm: remove khugepaged double thp vmstat update with CONFIG_NUMA=n

2011-06-15 20:03:58 -07:00

hugetlb.c

mm: fix negative commitlimit when gigantic hugepages are allocated

2011-06-15 20:04:01 -07:00

hwpoison-inject.c

…

init-mm.c

mm: convert mm->cpu_vm_cpumask into cpumask_var_t

2011-05-25 08:39:21 -07:00

internal.h

mm: nommu: sort mm->mmap list properly

2011-05-25 08:39:05 -07:00

Kconfig

mm: cleancache core ops functions and config

2011-05-26 10:01:36 -06:00

Kconfig.debug

…

kmemcheck.c

…

kmemleak-test.c

…

kmemleak.c

…

ksm.c

ksm: fix NULL pointer dereference in scan_get_next_rmap_item()

2011-06-15 20:04:02 -07:00

maccess.c

maccess,probe_kernel: Make write/read src const void *

2011-05-25 19:56:23 -04:00

madvise.c

…

Makefile

mm: cleancache core ops functions and config

2011-05-26 10:01:36 -06:00

memblock.c

…

memcontrol.c

memcg: fix behavior of mem_cgroup_resize_limit()

2011-08-04 21:58:41 -07:00

memory_hotplug.c

mm, hotplug: protect zonelist building with zonelists_mutex

2011-06-22 21:06:48 -07:00

memory-failure.c

mm/memory-failure.c: fix spinlock vs mutex order

2011-06-27 18:00:13 -07:00

memory.c

mm/futex: fix futex writes on archs with SW tracking of dirty & young

2011-08-04 21:58:38 -07:00

mempolicy.c

mm: proc: move show_numa_map() to fs/proc/task_mmu.c

2011-05-25 08:39:34 -07:00

mempool.c

…

migrate.c

migrate: don't account swapcache as shmem

2011-06-16 15:01:24 -07:00

mincore.c

…

mlock.c

mm: don't access vm_flags as 'int'

2011-05-26 09:20:31 -07:00

mm_init.c

…

mmap.c

mm: get rid of the most spurious find_vma_prev() users

2011-06-16 00:35:09 -07:00

mmu_context.c

…

mmu_notifier.c

…

mmzone.c

…

mprotect.c

…

mremap.c

mm: Convert i_mmap_lock to a mutex

2011-05-25 08:39:18 -07:00

msync.c

…

nobootmem.c

memblock/nobootmem: remove unneeded code from alloc_bootmem_node_high()

2011-05-25 08:39:31 -07:00

nommu.c

mm/nommu.c: fix remap_pfn_range()

2011-07-08 21:14:44 -07:00

oom_kill.c

oom: task->mm == NULL doesn't mean the memory was freed

2011-08-04 21:58:42 -07:00

page_alloc.c

Revert "mm: fail GFP_DMA allocations when ZONE_DMA is not configured"

2011-06-02 06:11:24 +09:00

page_cgroup.c

memcg: fix init_page_cgroup nid with sparsemem

2011-06-15 20:04:01 -07:00

page_io.c

…

page_isolation.c

…

page-writeback.c

…

pagewalk.c

…

percpu-km.c

…

percpu-vm.c

…

percpu.c

…

pgtable-generic.c

…

prio_tree.c

…

quicklist.c

…

readahead.c

readahead: readahead page allocations are OK to fail

2011-05-25 08:39:25 -07:00

rmap.c

mm/memory-failure.c: fix spinlock vs mutex order

2011-06-27 18:00:13 -07:00

shmem.c

tmpfs: add shmem_read_mapping_page_gfp

2011-06-27 18:00:12 -07:00

slab.c

SLAB: Record actual last user of freed objects.

2011-06-03 19:33:50 +03:00

slob.c

…

slub.c

slub: always align cpu_slab to honor cmpxchg_double requirement

2011-06-03 19:33:49 +03:00

sparse-vmemmap.c

…

sparse.c

…

swap_state.c

…

swap.c

mm: batch activate_page() to reduce lock contention

2011-05-25 08:39:37 -07:00

swapfile.c

mm: move shmem prototypes to shmem_fs.h

2011-06-27 18:00:12 -07:00

thrash.c

vmscan: implement swap token priority aging

2011-06-15 20:03:59 -07:00

truncate.c

mm: fix assertion mapping->nrpages == 0 in end_writeback()

2011-06-27 18:00:13 -07:00

util.c

mm: nommu: sort mm->mmap list properly

2011-05-25 08:39:05 -07:00

vmalloc.c

Merge branch 'upstream/tidy-xen-mmu-2.6.39' of git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen

2011-05-26 19:01:15 -07:00

vmscan.c

vmscan: fix a livelock in kswapd

2011-07-19 22:09:31 -07:00

vmstat.c

mm, mem-hotplug: update pcp->stat_threshold when memory hotplug occur

2011-05-25 08:39:09 -07:00