Commit a195d3f5 authored Aug 17, 2018 by Michal Hocko Committed by Linus Torvalds Aug 17, 2018

mm/oom_kill.c: document oom_lock



Add comments describing oom_lock's scope.

Requested-by: David Rientjes <rientjes@google.com>
Link: http://lkml.kernel.org/r/20180711120121.25635-1-mhocko@kernel.org


Signed-off-by: Michal Hocko <mhocko@suse.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent 40d18ebf

mm/oom_kill.c

+8 −0

Original line number	Diff line number	Diff line
		@@ -53,6 +53,14 @@ int sysctl_panic_on_oom;
		int sysctl_oom_kill_allocating_task;
		int sysctl_oom_dump_tasks = 1;

		/*
		* Serializes oom killer invocations (out_of_memory()) from all contexts to
		* prevent from over eager oom killing (e.g. when the oom killer is invoked
		* from different domains).
		*
		* oom_killer_disable() relies on this lock to stabilize oom_killer_disabled
		* and mark_oom_victim
		*/
		DEFINE_MUTEX(oom_lock);

		#ifdef CONFIG_NUMA

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