linux-kernel - Re: [patch] mm: memcg: move pc lookup point to commit

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Message-ID: <4F98AC9A.2080001@jp.fujitsu.com>
Date:	Thu, 26 Apr 2012 11:02:02 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	Johannes Weiner <hannes@...xchg.org>
CC:	Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
	cgroups@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [patch] mm: memcg: move pc lookup point to commit_charge()

(2012/04/25 4:31), Johannes Weiner wrote:

> None of the callsites actually need the page_cgroup descriptor
> themselves, so just pass the page and do the look up in there.
> 
> We already had two bugs (6568d4a 'mm: memcg: update the correct soft
> limit tree during migration' and 'memcg: fix Bad page state after
> replace_page_cache') where the passed page and pc were not referring
> to the same page frame.
> 
> Signed-off-by: Johannes Weiner <hannes@...xchg.org>
> Acked-by: Hugh Dickins <hughd@...gle.com>
> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
> Cc: Michal Hocko <mhocko@...e.cz>


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

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