linux-kernel - Re: [PATCH 1/4] mm: page_alloc: determine migratetype only once

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Message-ID: <alpine.DEB.2.02.1408061526250.13545@chino.kir.corp.google.com>
Date:	Wed, 6 Aug 2014 15:26:34 -0700 (PDT)
From:	David Rientjes <rientjes@...gle.com>
To:	Vlastimil Babka <vbabka@...e.cz>
cc:	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Mel Gorman <mgorman@...e.de>, Rik van Riel <riel@...hat.com>,
	Johannes Weiner <hannes@...xchg.org>,
	"Srivatsa S. Bhat" <srivatsa.bhat@...ux.vnet.ibm.com>,
	Hugh Dickins <hughd@...gle.com>,
	Minchan Kim <minchan@...nel.org>,
	Joonsoo Kim <iamjoonsoo.kim@....com>
Subject: Re: [PATCH 1/4] mm: page_alloc: determine migratetype only once

On Wed, 6 Aug 2014, Vlastimil Babka wrote:

> The check for ALLOC_CMA in __alloc_pages_nodemask() derives migratetype
> from gfp_mask in each retry pass, although the migratetype variable already
> has the value determined and it does not change. Use the variable and perform
> the check only once. Also convert #ifdef CONFIC_CMA to IS_ENABLED.
> 
> Signed-off-by: Vlastimil Babka <vbabka@...e.cz>

Acked-by: David Rientjes <rientjes@...gle.com>
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