linux-kernel - Re: [PATCH 1/3] mm: vmscan: Do use use PF_SWAPWRITE from zone

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Message-ID: <alpine.DEB.2.00.1107121042240.2530@router.home>
Date:	Tue, 12 Jul 2011 10:43:47 -0500 (CDT)
From:	Christoph Lameter <cl@...ux.com>
To:	Minchan Kim <minchan.kim@...il.com>
cc:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>, mgorman@...e.de,
	linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3] mm: vmscan: Do use use PF_SWAPWRITE from
 zone_reclaim

On Tue, 12 Jul 2011, Minchan Kim wrote:

> If I am not against this patch, at least, we need agreement of
> Christoph and others and if we agree this change, we changes vm.txt,
> too.

I think PF_SWAPWRITE should only be set if may_write was set earlier in
__zone_reclaim. If zone reclaim is not configured to do writeback then it
makes no sense to set the bit.

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