Message-ID: <4DD013CB.8080408@redhat.com>
Date: Sun, 15 May 2011 13:56:27 -0400
From: Rik van Riel <riel@redhat.com>
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To: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
CC: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
        akpm@linux-foundation.org, kamezawa.hiroyu@jp.fujitsu.com,
        minchan.kim@gmail.com
Subject: Re: [PATCH 1/3] vmscan,memcg: memcg aware swap token
References: <4DCD1824.1060801@jp.fujitsu.com> <4DCD189D.2000207@jp.fujitsu.com>
In-Reply-To: <4DCD189D.2000207@jp.fujitsu.com>
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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@jp.fujitsu.com>

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

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