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Date: Wed, 27 Apr 2016 11:07:13 +0100
From: Mel Gorman <mgorman@techsingularity.net>
Subject: Re: [PATCH 23/28] mm, page_alloc: Check multiple page fields with a
 single branch
Message-ID: <20160427100713.GG2858@techsingularity.net>
References: <1460710760-32601-1-git-send-email-mgorman@techsingularity.net>
 <1460711275-1130-1-git-send-email-mgorman@techsingularity.net>
 <1460711275-1130-11-git-send-email-mgorman@techsingularity.net>
 <571FB66E.80306@suse.cz>
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To: Vlastimil Babka <vbabka@suse.cz>
Cc: Andrew Morton <akpm@linux-foundation.org>, Jesper Dangaard Brouer <brouer@redhat.com>, Linux-MM <linux-mm@kvack.org>, LKML <linux-kernel@vger.kernel.org>

On Tue, Apr 26, 2016 at 08:41:50PM +0200, Vlastimil Babka wrote:
> On 04/15/2016 11:07 AM, Mel Gorman wrote:
> >Signed-off-by: Mel Gorman <mgorman@techsingularity.net>
> 
> Acked-by: Vlastimil Babka <vbabka@suse.cz>
> 
> I wonder, would it be just too ugly to add +1 to
> atomic_read(&page->_mapcount) and OR it with the rest for a truly single
> branch?
> 

Interesting thought. I'm not going to do it as a fix but when I'm doing
the next round of page allocator material, I'll add it to the pile for
evaluation.

-- 
Mel Gorman
SUSE Labs

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