linux-kernel - Re: Low overhead patches for the memory cgroup controller (v5)

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Message-ID: <20090615044109.GG23577@balbir.in.ibm.com>
Date:	Mon, 15 Jun 2009 10:11:09 +0530
From:	Balbir Singh <balbir@...ux.vnet.ibm.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	"nishimura@....nes.nec.co.jp" <nishimura@....nes.nec.co.jp>,
	"lizf@...fujitsu.com" <lizf@...fujitsu.com>,
	"menage@...gle.com" <menage@...gle.com>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Subject: Re: Low overhead patches for the memory cgroup controller (v5)

* Balbir Singh <balbir@...ux.vnet.ibm.com> [2009-06-15 10:09:00]:

> 
> Feature: Remove the overhead associated with the root cgroup
> 
> From: Balbir Singh <balbir@...ux.vnet.ibm.com>
> 
> Changelog v5 -> v4
> 1. Moved back to v3 logic (Daisuke and Kamezawa like that better)
> 2. Incorporated changes from Daisuke (remove list_empty() checks)
> 3. Updated documentation to reflect that limits cannot be set on root
>    cgroup
> 
> Changelog v4 -> v3
> 1. Rebase to mmotm 9th june 2009
> 2. Remove PageCgroupRoot, we have account LRU flags to indicate that
>    we do only accounting and no reclaim.
> 3. pcg_default_flags has been used again, since PCGF_ROOT is gone,
>    we set PCGF_ACCT_LRU only in mem_cgroup_add_lru_list
> 4. More LRU functions are aware of PageCgroupAcctLRU
> 
> Changelog v3 -> v2
> 
> 1. Rebase to mmotm 2nd June 2009
> 2. Test with some of the test cases recommended by Daisuke-San
> 
> Changelog v2 -> v1
> 1. Rebase to latest mmotm
> 
> This patch changes the memory cgroup and removes the overhead associated
> with accounting all pages in the root cgroup. As a side-effect, we can
> no longer set a memory hard limit in the root cgroup.
> 
> A new flag to track whether the page has been accounted or not
> has been added as well. Flags are now set atomically for page_cgroup,
> pcg_default_flags is now obsolete and removed.
> 
> Signed-off-by: Balbir Singh <balbir@...ux.vnet.ibm.com>
> Signed-off-by: Daisuke Nishimura <nishimura@....nes.nec.co.jp>

CC'ing the correct Kamezawa-San

-- 
	Balbir
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