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

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Message-ID: <20130109220641.GA12865@lizard.fhda.edu>
Date:	Wed, 9 Jan 2013 14:06:41 -0800
From:	Anton Vorontsov <anton.vorontsov@...aro.org>
To:	Tejun Heo <tj@...nel.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

On Wed, Jan 09, 2013 at 01:55:14PM -0800, Tejun Heo wrote:
[...]
> > We can use mempressure w/o memcg, and even then it can (or should :) be
> > useful (for cpuset, for example).
> 
> The problem is that you end with, at the very least, duplicate
> hierarchical accounting mechanisms which overlap with each other
> while, most likely, being slightly different.  About the same thing
> happened with cpu and cpuacct controllers and we're now trying to
> deprecate the latter.

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. :)

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

I will surely Cc you on the next interations.

Thanks,
Anton
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