linux-kernel - Re: [PATCH V2 1/2] mm/vmscan: restore sc->gfp_mask after promoting it to __GFP

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Date:	Fri, 14 Feb 2014 11:04:19 +0000
From:	Mel Gorman <mgorman@...e.de>
To:	Weijie Yang <weijie.yang@...sung.com>
Cc:	'Andrew Morton' <akpm@...ux-foundation.org>, riel@...hat.com,
	'Minchan Kim' <minchan@...nel.org>, weijie.yang.kh@...il.com,
	'Linux-MM' <linux-mm@...ck.org>,
	'linux-kernel' <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH V2 1/2] mm/vmscan: restore sc->gfp_mask after promoting
 it to __GFP_HIGHMEM

On Fri, Feb 14, 2014 at 02:41:33PM +0800, Weijie Yang wrote:
> We promote sc->gfp_mask to __GFP_HIGHMEM to forcibly scan highmem if
> there are too many buffer_heads pinning highmem. see: cc715d99e5
> 
> This patch restores sc->gfp_mask to its caller original value after
> finishing the scan job, to avoid the impact on other invocations from
> its upper caller, such as vmpressure_prio(), shrink_slab().
> 
> Signed-off-by: Weijie Yang <weijie.yang@...sung.com>

Acked-by: Mel Gorman <mgorman@...e.de>

-- 
Mel Gorman
SUSE Labs
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