linux-kernel - Re: [PATCH v3 0/4] cgroup notifications API and memory thresholds

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Date:	Sun, 27 Dec 2009 01:37:28 +0200
From:	"Kirill A. Shutemov" <kirill@...temov.name>
To:	balbir@...ux.vnet.ibm.com
Cc:	containers@...ts.linux-foundation.org, linux-mm@...ck.org,
	Paul Menage <menage@...gle.com>,
	Li Zefan <lizf@...fujitsu.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Pavel Emelyanov <xemul@...nvz.org>,
	Dan Malek <dan@...eddedalley.com>,
	Vladislav Buzov <vbuzov@...eddedalley.com>,
	Daisuke Nishimura <nishimura@....nes.nec.co.jp>,
	Alexander Shishkin <virtuoso@...nd.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 0/4] cgroup notifications API and memory thresholds

On Sat, Dec 26, 2009 at 3:30 PM, Balbir Singh <balbir@...ux.vnet.ibm.com> wrote:
> * Kirill A. Shutemov <kirill@...temov.name> [2009-12-26 02:30:56]:
>
>> This patchset introduces eventfd-based API for notifications in cgroups and
>> implements memory notifications on top of it.
>>
>> It uses statistics in memory controler to track memory usage.
>>
>> Output of time(1) on building kernel on tmpfs:
>>
>> Root cgroup before changes:
>>       make -j2  506.37 user 60.93s system 193% cpu 4:52.77 total
>> Non-root cgroup before changes:
>>       make -j2  507.14 user 62.66s system 193% cpu 4:54.74 total
>> Root cgroup after changes (0 thresholds):
>>       make -j2  507.13 user 62.20s system 193% cpu 4:53.55 total
>> Non-root cgroup after changes (0 thresholds):
>>       make -j2  507.70 user 64.20s system 193% cpu 4:55.70 total
>> Root cgroup after changes (1 thresholds, never crossed):
>>       make -j2  506.97 user 62.20s system 193% cpu 4:53.90 total
>> Non-root cgroup after changes (1 thresholds, never crossed):
>>       make -j2  507.55 user 64.08s system 193% cpu 4:55.63 total
>>
>> Any comments?
>
> Could you please add some documentation for end users.

Sure. I'll send new version of patchset with documentation soon.

> I've just
> compiled a kernel with your changes for test. Also, is there a reason
> not to use cgroupstats?

I'm not sure that understand you correctly. Could you explain the idea?
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