netdev - Re: [PATCH] per-cgroup tcp buffer limitation

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Message-ID: <4E66C45A.8060706@parallels.com>
Date:	Tue, 6 Sep 2011 22:09:46 -0300
From:	Glauber Costa <glommer@...allels.com>
To:	Paul Menage <paul@...lmenage.org>
CC:	<linux-kernel@...r.kernel.org>, <linux-mm@...ck.org>,
	<containers@...ts.osdl.org>, <netdev@...r.kernel.org>,
	<xemul@...allels.com>, "David S. Miller" <davem@...emloft.net>,
	Hiroyouki Kamezawa <kamezawa.hiroyu@...fujitsu.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>
Subject: Re: [PATCH] per-cgroup tcp buffer limitation

On 09/06/2011 10:08 PM, Paul Menage wrote:
> On Mon, Sep 5, 2011 at 7:35 PM, Glauber Costa<glommer@...allels.com>  wrote:
>> This patch introduces per-cgroup tcp buffers limitation. This allows
>> sysadmins to specify a maximum amount of kernel memory that
>> tcp connections can use at any point in time. TCP is the main interest
>> in this work, but extending it to other protocols would be easy.

Hi Paul,


> The general idea of limiting total socket buffer memory consumed by a
> cgroup is a fine idea, but I think it needs to be integrated more
> closely with the existing kernel memory cgroup tracking efforts,
> especially if you're trying to use as generic a name as "kmem" for it.
Can you be more specific?

The generic part of kmem cgroup in this patch is quite simple. I think 
any other patchset would have a very easy time merging things into it.
90 % is sockets.

>
> I agree with Kamezawa's comments that you need a lot more documentation.
Working on it right now.
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