linux-kernel - Re: [PATCH 08/25] Calculate the preferred zone for allocation only once

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Message-Id: <20090421155256.F133.A69D9226@jp.fujitsu.com>
Date:	Tue, 21 Apr 2009 16:03:59 +0900 (JST)
From:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
To:	Mel Gorman <mel@....ul.ie>
Cc:	kosaki.motohiro@...fujitsu.com,
	Linux Memory Management List <linux-mm@...ck.org>,
	Christoph Lameter <cl@...ux-foundation.org>,
	Nick Piggin <npiggin@...e.de>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Lin Ming <ming.m.lin@...el.com>,
	Zhang Yanmin <yanmin_zhang@...ux.intel.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Pekka Enberg <penberg@...helsinki.fi>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH 08/25] Calculate the preferred zone for allocation only once

> get_page_from_freelist() can be called multiple times for an allocation.
> Part of this calculates the preferred_zone which is the first usable
> zone in the zonelist. This patch calculates preferred_zone once.
> 
> Signed-off-by: Mel Gorman <mel@....ul.ie>

I'm not sure this patch improve performance largely or not.
but I don't find the bug.


	Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>




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