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From: Oleg Nesterov <oleg@redhat.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
	Hugh Dickins <hughd@google.com>,
	linux-mm@kvack.org, Andrey Vagin <avagin@openvz.org>,
	David Rientjes <rientjes@google.com>
Subject: [PATCH 3/3] oom: select_bad_process: use same_thread_group()
Date: Sat, 12 Mar 2011 14:44:53 +0100	[thread overview]
Message-ID: <20110312134453.GD27275@redhat.com> (raw)
In-Reply-To: <20110312134341.GA27275@redhat.com>

select_bad_process() checks if the exiting process is current. This
condition can never be true if the caller is not the main thread.
Use same_thread_group() instead.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
---

 mm/oom_kill.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- 38/mm/oom_kill.c~fix_ck_current	2011-03-12 14:22:19.000000000 +0100
+++ 38/mm/oom_kill.c	2011-03-12 14:27:14.000000000 +0100
@@ -341,7 +341,7 @@ static struct task_struct *select_bad_pr
 		 * Otherwise we could get an easy OOM deadlock.
 		 */
 		if (mm_is_exiting(p)) {
-			if (p != current)
+			if (!same_thread_group(p, current))
 				return ERR_PTR(-1UL);
 
 			chosen = p;

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  parent reply	other threads:[~2011-03-12 13:53 UTC|newest]

Thread overview: 53+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-03-01 19:09 [patch] oom: prevent unnecessary oom kills or kernel panics David Rientjes
2011-03-03  1:20 ` KOSAKI Motohiro
2011-03-03 19:53   ` David Rientjes
2011-03-06 11:14     ` KOSAKI Motohiro
2011-03-06 22:06       ` David Rientjes
2011-03-08  0:24         ` KOSAKI Motohiro
2011-03-08  2:01         ` KOSAKI Motohiro
2011-03-08 13:42   ` Oleg Nesterov
2011-03-08 23:57     ` David Rientjes
2011-03-09 10:36       ` KOSAKI Motohiro
2011-03-09 11:06       ` Oleg Nesterov
2011-03-09 20:32         ` David Rientjes
2011-03-10 12:05           ` Oleg Nesterov
2011-03-10 15:40             ` [PATCH 0/1] Was: " Oleg Nesterov
2011-03-10 15:41               ` [PATCH 1/1] oom_kill_task: mark every thread as TIF_MEMDIE Oleg Nesterov
2011-03-13  1:08                 ` David Rientjes
2011-03-10 16:36               ` [PATCH 0/1] select_bad_process: improve the PF_EXITING check Oleg Nesterov
2011-03-10 16:37                 ` [PATCH 1/1] " Oleg Nesterov
2011-03-10 16:40                 ` [PATCH 0/1] " Oleg Nesterov
2011-03-10 17:18                   ` [PATCH v2 " Oleg Nesterov
2011-03-10 17:19                     ` [PATCH v2 1/1] " Oleg Nesterov
2011-03-13  1:06             ` [patch] oom: prevent unnecessary oom kills or kernel panics David Rientjes
2011-03-09 23:19       ` Andrew Morton
2011-03-11 19:45         ` David Rientjes
2011-03-12 12:34           ` Oleg Nesterov
2011-03-12 13:43             ` [PATCH 0/3] oom: TIF_MEMDIE/PF_EXITING fixes Oleg Nesterov
2011-03-12 13:44               ` [PATCH 1/3] oom: oom_kill_task: mark every thread as TIF_MEMDIE Oleg Nesterov
2011-03-13  1:14                 ` David Rientjes
2011-03-12 13:44               ` [PATCH 2/3] oom: select_bad_process: improve the PF_EXITING check Oleg Nesterov
2011-03-12 13:44               ` Oleg Nesterov [this message]
2011-03-12 19:40               ` [PATCH 0/3] oom: TIF_MEMDIE/PF_EXITING fixes Hugh Dickins
2011-03-13  8:53                 ` KOSAKI Motohiro
2011-03-13 21:27                 ` Oleg Nesterov
2011-03-14 19:04                   ` [PATCH 0/3 for 2.6.38] oom: fixes Oleg Nesterov
2011-03-14 19:04                     ` [PATCH 1/3 for 2.6.38] oom: oom_kill_process: don't set TIF_MEMDIE if !p->mm Oleg Nesterov
2011-03-14 19:35                       ` Linus Torvalds
2011-03-14 20:31                         ` Oleg Nesterov
2011-03-14 20:32                         ` David Rientjes
2011-03-15 19:12                           ` Oleg Nesterov
2011-03-15 19:51                             ` David Rientjes
2011-03-14 20:22                       ` David Rientjes
2011-03-15 18:53                         ` Oleg Nesterov
2011-03-15 19:54                           ` David Rientjes
2011-03-15 21:16                             ` Oleg Nesterov
2011-03-14 19:05                     ` [PATCH 2/3 for 2.6.38] oom: select_bad_process: ignore TIF_MEMDIE zombies Oleg Nesterov
2011-03-14 20:50                       ` David Rientjes
2011-03-14 19:05                     ` [PATCH 3/3 for 2.6.38] oom: oom_kill_process: fix the child_points logic Oleg Nesterov
2011-03-14 20:41                       ` David Rientjes
2011-03-15 19:21                         ` Oleg Nesterov
2011-03-13 11:36               ` [PATCH 0/3] oom: TIF_MEMDIE/PF_EXITING fixes KOSAKI Motohiro
2011-03-13  1:11             ` [patch] oom: prevent unnecessary oom kills or kernel panics David Rientjes
2011-03-13  1:15               ` [patch -mm] oom: avoid deferring oom killer if exiting task is being traced David Rientjes
2011-03-14 17:40                 ` Oleg Nesterov

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