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In-Reply-To: <20110510171641.16AF.A69D9226@jp.fujitsu.com>
References: <20110509182110.167F.A69D9226@jp.fujitsu.com>
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Date: Thu, 12 May 2011 08:33:47 +0900
Message-ID: <BANLkTikcLk_Wbh47eYNh-_ETe3n4XXrDaw@mail.gmail.com>
Subject: Re: [PATCH 2/4] oom: kill younger process first
From: Minchan Kim <minchan.kim@gmail.com>
To: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: CAI Qian <caiqian@redhat.com>, avagin@gmail.com,
        Andrey Vagin <avagin@openvz.org>,
        Andrew Morton <akpm@linux-foundation.org>, Mel Gorman <mel@csn.ul.ie>,
        linux-mm@kvack.org, linux-kernel@vger.kernel.org,
        David Rientjes <rientjes@google.com>, Hugh Dickins <hughd@google.com>,
        Oleg Nesterov <oleg@redhat.com>
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On Tue, May 10, 2011 at 5:15 PM, KOSAKI Motohiro
<kosaki.motohiro@jp.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@redhat.com>
> Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Reviewed-by: Minchan Kim <minchan.kim@gmail.com>

-- 
Kind regards,
Minchan Kim
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