linux-kernel - Re: [PATCH] Replace page_mapping_inuse() with page

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Message-ID: <20091202110732.GA8693@cmpxchg.org>
Date:	Wed, 2 Dec 2009 12:07:32 +0100
From:	Johannes Weiner <hannes@...xchg.org>
To:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
Cc:	Rik van Riel <riel@...hat.com>,
	Larry Woodman <lwoodman@...hat.com>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	akpm@...ux-foundation.org,
	Hugh Dickins <hugh.dickins@...cali.co.uk>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Andrea Arcangeli <aarcange@...hat.com>
Subject: Re: [PATCH] Replace page_mapping_inuse() with page_mapped()

On Wed, Dec 02, 2009 at 12:28:26PM +0900, KOSAKI Motohiro wrote:

> From 61340720e6e66b645db8d5410e89fd3b67eda907 Mon Sep 17 00:00:00 2001
> From: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
> Date: Wed, 2 Dec 2009 12:05:26 +0900
> Subject: [PATCH] Replace page_mapping_inuse() with page_mapped()
> 
> page reclaim logic need to distingish mapped and unmapped pages.
> However page_mapping_inuse() don't provide proper test way. it test
> the address space (i.e. file) is mmpad(). Why `page' reclaim need
> care unrelated page's mapped state? it's unrelated.
> 
> Thus, This patch replace page_mapping_inuse() with page_mapped()
> 
> Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>

Reviewed-by: Johannes Weiner <hannes@...xchg.org>
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