linux-kernel - Re: [RFI] Shared accounting for memory resource controller

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Message-ID: <344eb09a0904080031y4406c001n584725b87024755@mail.gmail.com>
Date:	Wed, 8 Apr 2009 13:01:15 +0530
From:	Bharata B Rao <bharata.rao@...il.com>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Cc:	balbir@...ux.vnet.ibm.com,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"lizf@...fujitsu.com" <lizf@...fujitsu.com>,
	Rik van Riel <riel@...riel.com>,
	Bharata B Rao <bharata.rao@...ibm.com>,
	Dhaval Giani <dhaval@...ux.vnet.ibm.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [RFI] Shared accounting for memory resource controller

On Wed, Apr 8, 2009 at 12:48 PM, KAMEZAWA Hiroyuki
<kamezawa.hiroyu@...fujitsu.com> wrote:
>
> On Wed, 8 Apr 2009 12:41:15 +0530
> Balbir Singh <balbir@...ux.vnet.ibm.com> wrote:
> > 3. Using the above, we can then try to (using an algorithm you
> > proposed), try to do some work for figuring out the shared percentage.
> >
> This is the point. At last. Why "# of shared pages" is important ?
>
> I wonder it's better to add new stat file as memory.cacheinfo which helps
> following kind of commands.
>
>  #cacheinfo /cgroups/memory/group01/
>       /usr/lib/libc.so.1     30pages
>       /var/log/messages      1 pages
>       /tmp/xxxxxx            20 pages

Can I suggest that we don't add new files for additional stats and try
as far as possible to include them in <controller>.stat file. Please
note that we have APIs in libcgroup library which can return
statistics from controllers associated with a cgroup and these APIs
assume that stats are part of <controller>.stat file.

Regards,
Bharata.
--
http://bharata.sulekha.com/blog/posts.htm
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