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| author | Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> | 2017-09-01 02:15:20 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-09-01 02:33:14 +0300 |
| commit | e746bf730a76fe53b82c9e6b6da72d58e9ae3565 (patch) | |
| tree | 5d0170fe8a0bbfbbf4940a2c452ce0f505d14ade /kernel/kthread.c | |
| parent | 42ff72cf27027fa28dd79acabe01d9196f1480a7 (diff) | |
mm,page_alloc: don't call __node_reclaim() with oom_lock held.
We are doing a last second memory allocation attempt before calling
out_of_memory(). But since slab shrinker functions might indirectly
wait for other thread's __GFP_DIRECT_RECLAIM && !__GFP_NORETRY memory
allocations via sleeping locks, calling slab shrinker functions from
node_reclaim() from get_page_from_freelist() with oom_lock held has
possibility of deadlock. Therefore, make sure that last second memory
allocation attempt does not call slab shrinker functions.
Link: http://lkml.kernel.org/r/1503577106-9196-1-git-send-email-penguin-kernel@I-love.SAKURA.ne.jp
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/kthread.c')
0 files changed, 0 insertions, 0 deletions