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23 October 2021, 00:29:24 UTC
Revision 184101bf143ac96d62b3dcc17e7b3550f98d3350 authored by David Rientjes on 06 May 2009, 23:02:55 UTC, committed by Linus Torvalds on 06 May 2009, 23:36:09 UTC 
oom: prevent livelock when oom_kill_allocating_task is set
 
When /proc/sys/vm/oom_kill_allocating_task is set for large systems that
want to avoid the lengthy tasklist scan, it's possible to livelock if
current is ineligible for oom kill.  This normally happens when it is set
to OOM_DISABLE, but is also possible if any threads are sharing the same
->mm with a different tgid.

So change __out_of_memory() to fall back to the full task-list scan if it
was unable to kill `current'.

Cc: Nick Piggin <npiggin@suse.de>
Signed-off-by: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1 parent df3935f
History
Tip revision: 184101bf143ac96d62b3dcc17e7b3550f98d3350 authored by David Rientjes on 06 May 2009, 23:02:55 UTC
oom: prevent livelock when oom_kill_allocating_task is set
Tip revision: 184101b
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