linux-kernel - Re: [PATCH 5/5] add shmem vmstat

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Message-ID: <4A5606DB.7060503@redhat.com>
Date:	Thu, 09 Jul 2009 11:03:55 -0400
From:	Rik van Riel <riel@...hat.com>
To:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
CC:	LKML <linux-kernel@...r.kernel.org>, linux-mm <linux-mm@...ck.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Wu Fengguang <fengguang.wu@...el.com>,
	Christoph Lameter <cl@...ux-foundation.org>,
	David Rientjes <rientjes@...gle.com>,
	Hugh Dickins <hugh.dickins@...cali.co.uk>
Subject: Re: [PATCH 5/5] add shmem vmstat

KOSAKI Motohiro wrote:
> ChangeLog
>   Since v1
>    - Fixed misaccounting bug on page migration
> 
> ========================
> Subject: [PATCH] add shmem vmstat
> 
> Recently, We faced several OOM problem by plenty GEM cache. and generally,
> plenty Shmem/Tmpfs potentially makes memory shortage problem.
> 
> We often use following calculation to know shmem pages,
>   shmem = NR_ACTIVE_ANON + NR_INACTIVE_ANON - NR_ANON_PAGES
> but it is wrong expression. it doesn't consider isolated page and
> mlocked page.
> 
> Then, This patch make explicit Shmem/Tmpfs vm-stat accounting.
> 
> 
> Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>

Acked-by: Rik van Riel <riel@...hat.com>

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