linux-kernel - Re: [PATCH 1/2] Add mempressure cgroup

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Message-ID: <20130109222144.GF20454@htj.dyndns.org>
Date:	Wed, 9 Jan 2013 14:21:44 -0800
From:	Tejun Heo <tj@...nel.org>
To:	Anton Vorontsov <anton.vorontsov@...aro.org>
Cc:	Glauber Costa <glommer@...allels.com>,
	David Rientjes <rientjes@...gle.com>,
	Pekka Enberg <penberg@...nel.org>,
	Mel Gorman <mgorman@...e.de>, Michal Hocko <mhocko@...e.cz>,
	"Kirill A. Shutemov" <kirill@...temov.name>,
	Luiz Capitulino <lcapitulino@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Greg Thelen <gthelen@...gle.com>,
	Leonid Moiseichuk <leonid.moiseichuk@...ia.com>,
	KOSAKI Motohiro <kosaki.motohiro@...il.com>,
	Minchan Kim <minchan@...nel.org>,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
	John Stultz <john.stultz@...aro.org>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, linaro-kernel@...ts.linaro.org,
	patches@...aro.org, kernel-team@...roid.com,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Subject: Re: [PATCH 1/2] Add mempressure cgroup

Hello, Anton.

On Wed, Jan 09, 2013 at 02:06:41PM -0800, Anton Vorontsov wrote:
> Yeah. I started answering your comments about hierarchical accounting,
> looked into the memcg code, and realized that *this* is where I need the
> memcg stuff. :)

Yay, I wasn't completely clueless.

> Thus yes, I guess I'll have to integrate it with memcg, or sort of.

I really don't know much about memcg internals but I guess
implementation can be split into two pieces.  memcg already has its
own accounting and pressure mechanism so it should be possible to bolt
on the mempressure interface on top of already existing data.  You can
improve / bring some sanity :) to memcg if the proposed mempressure
implementation is better.

Thanks.

-- 
tejun
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