linux-kernel - Re: [PATCH 05/19] mm: page_alloc: Calculate classzone

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Message-Id: <20140513152556.d14e3eaff8949a7010c02686@linux-foundation.org>
Date:	Tue, 13 May 2014 15:25:56 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Mel Gorman <mgorman@...e.de>
Cc:	Johannes Weiner <hannes@...xchg.org>,
	Vlastimil Babka <vbabka@...e.cz>, Jan Kara <jack@...e.cz>,
	Michal Hocko <mhocko@...e.cz>, Hugh Dickins <hughd@...gle.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Dave Hansen <dave.hansen@...el.com>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	Linux-MM <linux-mm@...ck.org>,
	Linux-FSDevel <linux-fsdevel@...r.kernel.org>
Subject: Re: [PATCH 05/19] mm: page_alloc: Calculate classzone_idx once from
 the zonelist ref

On Tue, 13 May 2014 10:45:36 +0100 Mel Gorman <mgorman@...e.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.
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