linux-kernel - Re: [patch] memcg: fix unit mismatch in memcg oom limit calculation

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Date:	Tue, 16 Nov 2010 13:02:40 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	Johannes Weiner <hannes@...xchg.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	David Rientjes <rientjes@...gle.com>,
	Balbir Singh <balbir@...ibm.com>,
	Daisuke Nishimura <nishimura@....nes.nec.co.jp>,
	Greg Thelen <gthelen@...gle.com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: Re: [patch] memcg: fix unit mismatch in memcg oom limit calculation

On Tue, 9 Nov 2010 12:05:21 +0100
Johannes Weiner <hannes@...xchg.org> wrote:

> Adding the number of swap pages to the byte limit of a memory control
> group makes no sense.  Convert the pages to bytes before adding them.
> 
> The only user of this code is the OOM killer, and the way it is used
> means that the error results in a higher OOM badness value.  Since the
> cgroup limit is the same for all tasks in the cgroup, the error should
> have no practical impact at the moment.
> 
> But let's not wait for future or changing users to trip over it.
> 
> Signed-off-by: Johannes Weiner <hannes@...xchg.org>


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


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