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Date: Wed, 13 Apr 2011 11:41:18 -0700 (PDT)
From: David Rientjes <rientjes@google.com>
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To: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
cc: Andrey Vagin <avagin@openvz.org>, Minchan Kim <minchan.kim@gmail.com>,
        KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
        "Luis Claudio R. Goncalves" <lclaudio@uudg.org>,
        LKML <linux-kernel@vger.kernel.org>, linux-mm <linux-mm@kvack.org>,
        Oleg Nesterov <oleg@redhat.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Linus Torvalds <torvalds@linux-foundation.org>
Subject: Re: [PATCH 2/4] remove boost_dying_task_prio()
In-Reply-To: <20110411143215.0074.A69D9226@jp.fujitsu.com>
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References: <20110411142949.006C.A69D9226@jp.fujitsu.com> <20110411143215.0074.A69D9226@jp.fujitsu.com>
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On Mon, 11 Apr 2011, KOSAKI Motohiro wrote:

> This is a almost revert commit 93b43fa (oom: give the dying
> task a higher priority).
> 
> The commit dramatically improve oom killer logic when fork-bomb
> occur. But, I've found it has nasty corner case. Now cpu cgroup
> has strange default RT runtime. It's 0! That said, if a process
> under cpu cgroup promote RT scheduling class, the process never
> run at all.
> 
> Eventually, kernel may hang up when oom kill occur.
> I and Luis who original author agreed to disable this logic at
> once.
> 
> Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
> Acked-by: Luis Claudio R. Goncalves <lclaudio@uudg.org>
> Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
> Reviewed-by: Minchan Kim <minchan.kim@gmail.com>

Acked-by: David Rientjes <rientjes@google.com>