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Date: Tue, 13 Sep 2011 19:50:31 +0900
From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Subject: Re: [patch 11/11] mm: memcg: remove unused node/section info from
 pc->flags
Message-Id: <20110913195031.5fa2a3c4.kamezawa.hiroyu@jp.fujitsu.com>
In-Reply-To: <1315825048-3437-12-git-send-email-jweiner@redhat.com>
References: <1315825048-3437-1-git-send-email-jweiner@redhat.com>
	<1315825048-3437-12-git-send-email-jweiner@redhat.com>
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To: Johannes Weiner <jweiner@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>, Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>, Balbir Singh <bsingharora@gmail.com>, Ying Han <yinghan@google.com>, Michal Hocko <mhocko@suse.cz>, Greg Thelen <gthelen@google.com>, Michel Lespinasse <walken@google.com>, Rik van Riel <riel@redhat.com>, Minchan Kim <minchan.kim@gmail.com>, Christoph Hellwig <hch@infradead.org>, linux-mm@kvack.org, linux-kernel@vger.kernel.org

On Mon, 12 Sep 2011 12:57:28 +0200
Johannes Weiner <jweiner@redhat.com> wrote:

> To find the page corresponding to a certain page_cgroup, the pc->flags
> encoded the node or section ID with the base array to compare the pc
> pointer to.
> 
> Now that the per-memory cgroup LRU lists link page descriptors
> directly, there is no longer any code that knows the page_cgroup but
> not the page.
> 
> Signed-off-by: Johannes Weiner <jweiner@redhat.com>

Ah, ok. remove init code and use zalloc()

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


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