linux-kernel - Re: [patch 2/5] memcg: change page_cgroup

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Message-Id: <20110204090307.38d7a7ea.kamezawa.hiroyu@jp.fujitsu.com>
Date:	Fri, 4 Feb 2011 09:03:07 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	Johannes Weiner <hannes@...xchg.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Daisuke Nishimura <nishimura@....nes.nec.co.jp>,
	Balbir Singh <balbir@...ux.vnet.ibm.com>, <linux-mm@...ck.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [patch 2/5] memcg: change page_cgroup_zoneinfo signature

On Thu,  3 Feb 2011 15:26:03 +0100
Johannes Weiner <hannes@...xchg.org> wrote:

> Instead of passing a whole struct page_cgroup to this function, let it
> take only what it really needs from it: the struct mem_cgroup and the
> page.
> 
> This has the advantage that reading pc->mem_cgroup is now done at the
> same place where the ordering rules for this pointer are enforced and
> explained.
> 
> It is also in preparation for removing the pc->page backpointer.
> 
> Signed-off-by: Johannes Weiner <hannes@...xchg.org>

Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>


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