linux-kernel - Re: (resend) [PATCH] vmscan,memcg: memcg aware swap token

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Message-Id: <20110426175021.c783e57d.kamezawa.hiroyu@jp.fujitsu.com>
Date:	Tue, 26 Apr 2011 17:50:21 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
Cc:	LKML <linux-kernel@...r.kernel.org>, linux-mm <linux-mm@...ck.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Nishimura Daisuke <d-nishimura@....biglobe.ne.jp>
Subject: Re: (resend) [PATCH] vmscan,memcg: memcg aware swap token

On Tue, 26 Apr 2011 16:59:19 +0900 (JST)
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 riskly. If an
> admin makes very small mem-cgroup and silly guy runs contenious heavy
> memory pressure workloa, whole tasks in the system 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 put swap-token.
> 
> Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
> Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>

Ack. Thank you.

-Kame


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