linux-kernel - Re: [PATCH 3/3] mm: when handling percpu_pagelist_fraction, use on_each

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Message-ID: <516193BC.3000503@gmail.com>
Date:	Sun, 07 Apr 2013 11:41:48 -0400
From:	KOSAKI Motohiro <kosaki.motohiro@...il.com>
To:	Cody P Schafer <cody@...ux.vnet.ibm.com>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	Mel Gorman <mgorman@...e.de>, Linux MM <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>, kosaki.motohiro@...il.com
Subject: Re: [PATCH 3/3] mm: when handling percpu_pagelist_fraction, use on_each_cpu()
 to set percpu pageset fields.

(4/5/13 4:33 PM), Cody P Schafer wrote:
> In free_hot_cold_page(), we rely on pcp->batch remaining stable.
> Updating it without being on the cpu owning the percpu pageset
> potentially destroys this stability.
> 
> Change for_each_cpu() to on_each_cpu() to fix.
> 
> Signed-off-by: Cody P Schafer <cody@...ux.vnet.ibm.com>

Acked-by: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>


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