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Date: Tue, 13 May 2014 15:25:56 -0700
From: Andrew Morton <akpm@linux-foundation.org>
To: Mel Gorman <mgorman@suse.de>
Cc: Johannes Weiner <hannes@cmpxchg.org>, Vlastimil Babka <vbabka@suse.cz>,
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        Linux Kernel <linux-kernel@vger.kernel.org>,
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Subject: Re: [PATCH 05/19] mm: page_alloc: Calculate classzone_idx once from
 the zonelist ref
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On Tue, 13 May 2014 10:45:36 +0100 Mel Gorman <mgorman@suse.de> wrote:

> There is no need to calculate zone_idx(preferred_zone) multiple times
> or use the pgdat to figure it out.
> 

This one falls afoul of pending mm/next changes in non-trivial ways.