From: Minchan Kim <minchan.kim@gmail.com>
To: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
linux-mm <linux-mm@kvack.org>,
Andrew Morton <akpm@linux-foundation.org>,
David Rientjes <rientjes@google.com>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
Andrea Arcangeli <aarcange@redhat.com>
Subject: Re: [PATCH 09/11] oom: remove child->mm check from oom_kill_process()
Date: Wed, 30 Jun 2010 23:30:13 +0900 [thread overview]
Message-ID: <20100630143013.GG15644@barrios-desktop> (raw)
In-Reply-To: <20100630183209.AA62.A69D9226@jp.fujitsu.com>
On Wed, Jun 30, 2010 at 06:32:44PM +0900, KOSAKI Motohiro wrote:
>
> Current "child->mm == p->mm" mean prevent to select vfork() task.
> But we don't have any reason to don't consider vfork().
I guess "child->mm == p->mm" is for losing the minimal amount of work done
as comment say. But frankly speaking, I don't understand it, either.
Maybe "One shot, two kill" problem?
Andrea. Could you explain it?
--
Kind regards,
Minchan Kim
WARNING: multiple messages have this Message-ID (diff)
From: Minchan Kim <minchan.kim@gmail.com>
To: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
linux-mm <linux-mm@kvack.org>,
Andrew Morton <akpm@linux-foundation.org>,
David Rientjes <rientjes@google.com>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
Andrea Arcangeli <aarcange@redhat.com>
Subject: Re: [PATCH 09/11] oom: remove child->mm check from oom_kill_process()
Date: Wed, 30 Jun 2010 23:30:13 +0900 [thread overview]
Message-ID: <20100630143013.GG15644@barrios-desktop> (raw)
In-Reply-To: <20100630183209.AA62.A69D9226@jp.fujitsu.com>
On Wed, Jun 30, 2010 at 06:32:44PM +0900, KOSAKI Motohiro wrote:
>
> Current "child->mm == p->mm" mean prevent to select vfork() task.
> But we don't have any reason to don't consider vfork().
I guess "child->mm == p->mm" is for losing the minimal amount of work done
as comment say. But frankly speaking, I don't understand it, either.
Maybe "One shot, two kill" problem?
Andrea. Could you explain it?
--
Kind regards,
Minchan Kim
--
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next prev parent reply other threads:[~2010-06-30 14:30 UTC|newest]
Thread overview: 72+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-30 9:25 [mmotm 0611][PATCH 00/11] various OOM bugfixes v3 KOSAKI Motohiro
2010-06-30 9:25 ` KOSAKI Motohiro
2010-06-30 9:27 ` [PATCH 01/11] oom: don't try to kill oom_unkillable child KOSAKI Motohiro
2010-06-30 9:27 ` KOSAKI Motohiro
2010-06-30 9:27 ` [PATCH 02/11] oom: oom_kill_process() doesn't select kthread child KOSAKI Motohiro
2010-06-30 9:27 ` KOSAKI Motohiro
2010-06-30 13:55 ` Minchan Kim
2010-06-30 13:55 ` Minchan Kim
2010-07-01 0:07 ` KOSAKI Motohiro
2010-07-01 0:07 ` KOSAKI Motohiro
2010-07-01 13:38 ` Minchan Kim
2010-07-01 13:38 ` Minchan Kim
2010-06-30 9:28 ` [PATCH 03/11] oom: make oom_unkillable_task() helper function KOSAKI Motohiro
2010-06-30 9:28 ` KOSAKI Motohiro
2010-06-30 14:19 ` Minchan Kim
2010-06-30 14:19 ` Minchan Kim
2010-07-01 0:07 ` KOSAKI Motohiro
2010-07-01 0:07 ` KOSAKI Motohiro
2010-06-30 9:29 ` [PATCH 04/11] oom: oom_kill_process() need to check p is unkillable KOSAKI Motohiro
2010-06-30 9:29 ` KOSAKI Motohiro
2010-06-30 13:57 ` Minchan Kim
2010-06-30 13:57 ` Minchan Kim
2010-06-30 9:30 ` [PATCH 05/11] oom: /proc/<pid>/oom_score treat kernel thread honestly KOSAKI Motohiro
2010-06-30 9:30 ` KOSAKI Motohiro
2010-06-30 14:03 ` Minchan Kim
2010-06-30 14:03 ` Minchan Kim
2010-07-01 0:07 ` KOSAKI Motohiro
2010-07-01 0:07 ` KOSAKI Motohiro
2010-07-01 14:36 ` Minchan Kim
2010-07-01 14:36 ` Minchan Kim
2010-06-30 9:31 ` [PATCH 06/11] oom: kill duplicate OOM_DISABLE check KOSAKI Motohiro
2010-06-30 9:31 ` KOSAKI Motohiro
2010-06-30 14:10 ` Minchan Kim
2010-06-30 14:10 ` Minchan Kim
2010-06-30 9:31 ` [PATCH 07/11] oom: move OOM_DISABLE check from oom_kill_task to out_of_memory() KOSAKI Motohiro
2010-06-30 9:31 ` KOSAKI Motohiro
2010-06-30 14:20 ` Minchan Kim
2010-06-30 14:20 ` Minchan Kim
2010-07-01 0:07 ` KOSAKI Motohiro
2010-07-01 0:07 ` KOSAKI Motohiro
2010-06-30 9:32 ` [PATCH 08/11] oom: cleanup has_intersects_mems_allowed() KOSAKI Motohiro
2010-06-30 9:32 ` KOSAKI Motohiro
2010-06-30 9:32 ` [PATCH 09/11] oom: remove child->mm check from oom_kill_process() KOSAKI Motohiro
2010-06-30 9:32 ` KOSAKI Motohiro
2010-06-30 14:30 ` Minchan Kim [this message]
2010-06-30 14:30 ` Minchan Kim
2010-06-30 9:33 ` [PATCH 10/11] oom: give the dying task a higher priority KOSAKI Motohiro
2010-06-30 9:33 ` KOSAKI Motohiro
2010-06-30 9:35 ` KOSAKI Motohiro
2010-06-30 9:35 ` KOSAKI Motohiro
2010-06-30 14:40 ` Minchan Kim
2010-06-30 14:40 ` Minchan Kim
2010-07-02 21:49 ` Andrew Morton
2010-07-02 21:49 ` Andrew Morton
2010-07-06 0:49 ` KOSAKI Motohiro
2010-07-06 0:49 ` KOSAKI Motohiro
2010-07-06 0:50 ` [PATCH 1/2] security: add const to security_task_setscheduler() KOSAKI Motohiro
2010-07-06 0:50 ` KOSAKI Motohiro
2010-07-06 0:51 ` [PATCH 2/2] sched: make sched_param arugment static variables in some sched_setscheduler() caller KOSAKI Motohiro
2010-07-06 0:51 ` KOSAKI Motohiro
2010-07-06 22:13 ` Steven Rostedt
2010-07-06 22:13 ` Steven Rostedt
2010-07-06 23:12 ` Andrew Morton
2010-07-06 23:12 ` Andrew Morton
2010-07-06 23:49 ` Steven Rostedt
2010-07-06 23:49 ` Steven Rostedt
2010-07-07 0:02 ` Andrew Morton
2010-07-07 0:02 ` Andrew Morton
2010-07-07 19:43 ` Peter Zijlstra
2010-07-07 19:43 ` Peter Zijlstra
2010-06-30 9:34 ` [PATCH 11/11] oom: multi threaded process coredump don't make deadlock KOSAKI Motohiro
2010-06-30 9:34 ` KOSAKI Motohiro
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