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Message-ID: <50EE6B41.8030205@parallels.com> Date: Thu, 10 Jan 2013 11:18:25 +0400 From: Glauber Costa <glommer@...allels.com> To: Anton Vorontsov <anton.vorontsov@...aro.org> CC: Tejun Heo <tj@...nel.org>, 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 01/10/2013 02:06 AM, Anton Vorontsov wrote: > 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. > That being my point since the beginning. To generate per-memcg pressure, you need memcg anyway. So you would have to have two different and orthogonal mechanisms, and therefore, double account. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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