Commit 30e2b41f authored Mar 22, 2011 by Andrey Vagin Committed by Linus Torvalds Mar 22, 2011

oom: skip zombies when iterating tasklist

We shouldn't defer oom killing if a thread has already detached its ->mm
and still has TIF_MEMDIE set.  Memory needs to be freed, so find kill
other threads that pin the same ->mm or find another task to kill.

Signed-off-by: Andrey Vagin <avagin@openvz.org>
Signed-off-by: David Rientjes <rientjes@google.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: <stable@kernel.org>		[2.6.38.x]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent 3a5dda7a

mm/oom_kill.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -299,6 +299,8 @@ static struct task_struct select_bad_process(unsigned int ppoints,
		do_each_thread(g, p) {
		unsigned int points;

		if (!p->mm)
		continue;
		if (oom_unkillable_task(p, mem, nodemask))
		continue;

		@@ -324,7 +326,7 @@ static struct task_struct select_bad_process(unsigned int ppoints,
		* the process of exiting and releasing its resources.
		* Otherwise we could get an easy OOM deadlock.
		*/
		if ((p->flags & PF_EXITING) && p->mm) {
		if (p->flags & PF_EXITING) {
		if (p != current)
		return ERR_PTR(-1UL);