linux-kernel - Re: [RFC] oom-kill: give the dying task a higher priority

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Message-Id: <20100601085006.f732c049.kamezawa.hiroyu@jp.fujitsu.com>
Date:	Tue, 1 Jun 2010 08:50:06 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	"Luis Claudio R. Goncalves" <lclaudio@...g.org>
Cc:	Minchan Kim <minchan.kim@...il.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	balbir@...ux.vnet.ibm.com, Oleg Nesterov <oleg@...hat.com>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <peterz@...radead.org>,
	David Rientjes <rientjes@...gle.com>,
	Mel Gorman <mel@....ul.ie>, williams@...hat.com
Subject: Re: [RFC] oom-kill: give the dying task a higher priority

On Mon, 31 May 2010 10:52:27 -0300
"Luis Claudio R. Goncalves" <lclaudio@...g.org> wrote:

> | If an explanation as "acceralating all thread's priority in a process seems overkill"
> | is given in changelog or comment, it's ok to me.
> 
> If my understanding of badness() is right, I wouldn't be ashamed of saying
> that it seems to be _a bit_ overkill. But I may be wrong in my
> interpretation.
> 
> While re-reading the code I noticed that in select_bad_process() we can
> eventually bump on an already dying task, case in which we just wait for
> the task to die and avoid killing other tasks. Maybe we could boost the
> priority of the dying task here too.
> 
yes, nice catch.

Thanks,
-Kame

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