linux-kernel - Re: [PATCH 2/4] vmscan: drop PF_SWAPWRITE from zone

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Message-ID: <4A0ACCAA.4020505@redhat.com>
Date:	Wed, 13 May 2009 09:35:38 -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>,
	Christoph Lameter <cl@...ux-foundation.org>
Subject: Re: [PATCH 2/4] vmscan: drop PF_SWAPWRITE from zone_reclaim

KOSAKI Motohiro wrote:
> Subject: [PATCH] vmscan: drop PF_SWAPWRITE from zone_reclaim
> 
> PF_SWAPWRITE mean ignore write congestion. (see may_write_to_queue())
> 
> foreground reclaim shouldn't ignore it because to write congested device cause
> large IO lantency.
> it isn't better than remote node allocation.

It might be on NUMAQ (which is no longer manufactured), but
your change looks right for every other vaguely modern NUMA
architecture that I know of.

> Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
> Cc: Christoph Lameter <cl@...ux-foundation.org>
> Cc: Rik van Riel <riel@...hat.com>

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

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