linux-kernel - Re: [PATCH 3/3] add isolate pages vmstat

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Message-ID: <alpine.DEB.1.10.0907171234130.11303@gentwo.org>
Date:	Fri, 17 Jul 2009 12:34:49 -0400 (EDT)
From:	Christoph Lameter <cl@...ux-foundation.org>
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>,
	Rik van Riel <riel@...hat.com>,
	Minchan Kim <minchan.kim@...il.com>
Subject: Re: [PATCH 3/3] add isolate pages vmstat

On Fri, 17 Jul 2009, KOSAKI Motohiro wrote:

> > Why do a separate pass over all the migrates pages? Can you add the
> > _inc_xx  somewhere after the page was isolated from the lru by calling
> > try_to_unmap()?
>
> calling try_to_unmap()? the pages are isolated before calling migrate_pages().
> migrate_pages() have multiple caller. then I put this __inc_xx into top of
> migrate_pages().

Then put the inc_xxx's where the pages are isolated.
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