linux-kernel - Re: [PATCH 2/4] oom: kill younger process first

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Message-ID: <BANLkTikcLk_Wbh47eYNh-_ETe3n4XXrDaw@mail.gmail.com>
Date:	Thu, 12 May 2011 08:33:47 +0900
From:	Minchan Kim <minchan.kim@...il.com>
To:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
Cc:	CAI Qian <caiqian@...hat.com>, avagin@...il.com,
	Andrey Vagin <avagin@...nvz.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Mel Gorman <mel@....ul.ie>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, David Rientjes <rientjes@...gle.com>,
	Hugh Dickins <hughd@...gle.com>,
	Oleg Nesterov <oleg@...hat.com>
Subject: Re: [PATCH 2/4] oom: kill younger process first

On Tue, May 10, 2011 at 5:15 PM, KOSAKI Motohiro
<kosaki.motohiro@...fujitsu.com> wrote:
> This patch introduces do_each_thread_reverse() and
> select_bad_process() uses it. The benefits are two,
> 1) oom-killer can kill younger process than older if
> they have a same oom score. Usually younger process
> is less important. 2) younger task often have PF_EXITING
> because shell script makes a lot of short lived processes.
> Reverse order search can detect it faster.
>
> Reported-by: CAI Qian <caiqian@...hat.com>
> Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
Reviewed-by: Minchan Kim <minchan.kim@...il.com>

-- 
Kind regards,
Minchan Kim
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