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

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Message-Id: <20110516170139.332fe31d.kamezawa.hiroyu@jp.fujitsu.com>
Date:	Mon, 16 May 2011 17:01:39 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
Cc:	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	akpm@...ux-foundation.org, minchan.kim@...il.com, riel@...hat.com
Subject: Re: [PATCH 1/3] vmscan,memcg: memcg aware swap token

On Fri, 13 May 2011 20:40:13 +0900
KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com> 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>

Thank you

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

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