linux-kernel - Re: [PATCH] Add file based RSS accounting for memory resource controller (v2)

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Message-ID: <344eb09a0904152059w1a0ecfa4l6ff8c5f2130680ba@mail.gmail.com>
Date:	Thu, 16 Apr 2009 09:29:53 +0530
From:	Bharata B Rao <bharata.rao@...il.com>
To:	balbir@...ux.vnet.ibm.com
Cc:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] Add file based RSS accounting for memory resource 
	controller (v2)

On Thu, Apr 16, 2009 at 7:29 AM, Balbir Singh <balbir@...ux.vnet.ibm.com> wrote:
>
> Feature: Add file RSS tracking per memory cgroup
>
> From: Balbir Singh <balbir@...ux.vnet.ibm.com>
>
> Changelog v3 -> v2
> 1. Add corresponding put_cpu() for every get_cpu()
>
> Changelog v2 -> v1
>
> 1. Rename file_rss to mapped_file
> 2. Add hooks into mem_cgroup_move_account for updating MAPPED_FILE statistics
> 3. Use a better name for the statistics routine.
>
>
> We currently don't track file RSS, the RSS we report is actually anon RSS.
> All the file mapped pages, come in through the page cache and get accounted
> there. This patch adds support for accounting file RSS pages. It should
>
> 1. Help improve the metrics reported by the memory resource controller
> 2. Will form the basis for a future shared memory accounting heuristic
>   that has been proposed by Kamezawa.
>
> Unfortunately, we cannot rename the existing "rss" keyword used in memory.stat
> to "anon_rss". We however, add "mapped_file" data and hope to educate the end
> user through documentation.
>
> Signed-off-by: Balbir Singh <balbir@...ux.vnet.ibm.com>

Balbir, could you please also update the documentation with the
description about this new metric ?

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