linux-kernel - Re: [patch 1/7 -mm] oom: filter tasks not sharing the same cpuset

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Message-Id: <20100212085259.c9a19c31.kamezawa.hiroyu@jp.fujitsu.com>
Date:	Fri, 12 Feb 2010 08:52:59 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	David Rientjes <rientjes@...gle.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Rik van Riel <riel@...hat.com>,
	Nick Piggin <npiggin@...e.de>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Balbir Singh <balbir@...ux.vnet.ibm.com>,
	Lubos Lunak <l.lunak@...e.cz>, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org
Subject: Re: [patch 1/7 -mm] oom: filter tasks not sharing the same cpuset

On Wed, 10 Feb 2010 08:32:08 -0800 (PST)
David Rientjes <rientjes@...gle.com> wrote:

> Tasks that do not share the same set of allowed nodes with the task that
> triggered the oom should not be considered as candidates for oom kill.
> 
> Tasks in other cpusets with a disjoint set of mems would be unfairly
> penalized otherwise because of oom conditions elsewhere; an extreme
> example could unfairly kill all other applications on the system if a
> single task in a user's cpuset sets itself to OOM_DISABLE and then uses
> more memory than allowed.
> 
> Killing tasks outside of current's cpuset rarely would free memory for
> current anyway.
> 
> Signed-off-by: David Rientjes <rientjes@...gle.com>

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

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