[Devel] [PATCH rh7 1/5] oom: do not select child that has already been killed

[Vladimir Davydov]

Otherwise, we might end up selecting the same process over and over
again in case it got stuck somewhere in exit path for some reason.

Signed-off-by: Vladimir Davydov <vdavydov at virtuozzo.com>
---
 mm/oom_kill.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index 2402fcceda6e..b21641ff508e 100644
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -847,6 +847,9 @@ void oom_kill_process(struct task_struct *p, gfp_t gfp_mask, int order,
 
 			if (child->mm == p->mm)
 				continue;
+			if (!child->mm ||
+			    test_tsk_thread_flag(child, TIF_MEMDIE))
+				continue;
 			/*
 			 * oom_badness() returns 0 if the thread is unkillable
 			 */
-- 
2.1.4