+ mm-oom-do-not-reap-task-if-there-are-live-threads-in-threadgroup.patch added to -mm tree

+ mm-oom-do-not-reap-task-if-there-are-live-threads-in-threadgroup.patch added to -mm tree

[akpm]

The patch titled
     Subject: mm: oom: do not reap task if there are live threads in threadgroup
has been added to the -mm tree.  Its filename is
     mm-oom-do-not-reap-task-if-there-are-live-threads-in-threadgroup.patch

This patch should soon appear at
    http://ozlabs.org/~akpm/mmots/broken-out/mm-oom-do-not-reap-task-if-there-are-live-threads-in-threadgroup.patch
and later at
    http://ozlabs.org/~akpm/mmotm/broken-out/mm-oom-do-not-reap-task-if-there-are-live-threads-in-threadgroup.patch

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------------------------------------------------------
From: Vladimir Davydov <vdavydov@virtuozzo.com>
Subject: mm: oom: do not reap task if there are live threads in threadgroup

If the current process is exiting, we don't invoke oom killer, instead we
give it access to memory reserves and try to reap its mm in case nobody is
going to use it.  There's a mistake in the code performing this check - we
just ignore any process of the same thread group no matter if it is
exiting or not - see try_oom_reaper.  Fix it.

Link: http://lkml.kernel.org/r/1464087628-7318-1-git-send-email-vdavydov@virtuozzo.com
Fixes: 3ef22dfff239 ("oom, oom_reaper: try to reap tasks which skip regular OOM killer path")Signed-off-by: Vladimir Davydov <vdavydov@virtuozzo.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/oom_kill.c |    2 --
 1 file changed, 2 deletions(-)

diff -puN mm/oom_kill.c~mm-oom-do-not-reap-task-if-there-are-live-threads-in-threadgroup mm/oom_kill.c
--- a/mm/oom_kill.c~mm-oom-do-not-reap-task-if-there-are-live-threads-in-threadgroup
+++ a/mm/oom_kill.c
@@ -611,8 +611,6 @@ void try_oom_reaper(struct task_struct *
 
 			if (!process_shares_mm(p, mm))
 				continue;
-			if (same_thread_group(p, tsk))
-				continue;
 			if (fatal_signal_pending(p))
 				continue;
 
_

Patches currently in -mm which might be from vdavydov@virtuozzo.com are

mm-oom-do-not-reap-task-if-there-are-live-threads-in-threadgroup.patch