linux-kernel - Re: [PATCH] memcg: towards I/O aware memcg v5

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Message-ID: <20100824074617.GI4684@balbir.in.ibm.com>
Date:	Tue, 24 Aug 2010 13:16:17 +0530
From:	Balbir Singh <balbir@...ux.vnet.ibm.com>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Cc:	linux-mm@...ck.org,
	"nishimura@....nes.nec.co.jp" <nishimura@....nes.nec.co.jp>,
	gthelen@...gle.com, m-ikeda@...jp.nec.com,
	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	kamezawa.hiroyuki@...il.com
Subject: Re: [PATCH] memcg: towards I/O aware memcg v5

* KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> [2010-08-20 18:55:52]:

> This is v5.
> 
> Sorry for delaying...but I had time for resetting myself and..several
> changes are added. I think this version is simpler than v4.
> 
> Major changes from v4 is 
>  a) added kernel/cgroup.c hooks again. (for b)
>  b) make RCU aware. previous version seems dangerous in an extreme case.
> 
> Then, codes are updated. Most of changes are related to RCU.
> 
> Patch brief view:
>  1. add hooks to kernel/cgroup.c for ID management.
>  2. use ID-array in memcg.
>  3. record ID to page_cgroup rather than pointer.
>  4. make update_file_mapped to be RCU aware routine instead of spinlock.
>  5. make update_file_mapped as general-purpose function.
>

Thanks for being persistent, will review the patches with comments in
the relevant patches. 

-- 
	Three Cheers,
	Balbir
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