linux-kernel - Re: [PATCH] Accelerate OOM killing

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Message-Id: <20110325083500.0ec98acb.kamezawa.hiroyu@jp.fujitsu.com>
Date:	Fri, 25 Mar 2011 08:35:00 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	Minchan Kim <minchan.kim@...il.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-mm <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Andrey Vagin <avagin@...nvz.org>
Subject: Re: [PATCH] Accelerate OOM killing

On Thu, 24 Mar 2011 18:52:33 +0900
Minchan Kim <minchan.kim@...il.com> wrote:

> When I test Andrey's problem, I saw the livelock and sysrq-t says
> there are many tasks in cond_resched after try_to_free_pages.
> 
> If did_some_progress is false, cond_resched could delay oom killing so
> It might be killing another task.
> 
> This patch accelerates oom killing without unnecessary giving CPU
> to another task. It could help avoding unnecessary another task killing
> and livelock situation a litte bit.
> 
> Cc: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
> Cc: Andrey Vagin <avagin@...nvz.org>
> Signed-off-by: Minchan Kim <minchan.kim@...il.com>

Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>

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