linux-kernel - Re: [PATCH 1/3] vmscan,memcg: memcg aware swap token

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Message-ID: <4DD013CB.8080408@redhat.com>
Date:	Sun, 15 May 2011 13:56:27 -0400
From:	Rik van Riel <riel@...hat.com>
To:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
CC:	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	akpm@...ux-foundation.org, kamezawa.hiroyu@...fujitsu.com,
	minchan.kim@...il.com
Subject: Re: [PATCH 1/3] vmscan,memcg: memcg aware swap token

On 05/13/2011 07:40 AM, KOSAKI Motohiro wrote:
> Currently, memcg reclaim can disable swap token even if the swap token
> mm doesn't belong in its memory cgroup. It's slightly risky. If an
> admin creates very small mem-cgroup and silly guy runs contentious heavy
> memory pressure workload, every tasks are going to lose swap token and
> then system may become unresponsive. That's bad.
>
> This patch adds 'memcg' parameter into disable_swap_token(). and if
> the parameter doesn't match swap token, VM doesn't disable it.
>
> Signed-off-by: KOSAKI Motohiro<kosaki.motohiro@...fujitsu.com>

Reviewed-by: Rik van Riel<riel@...hat.com>

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