linux-kernel - Re: [PATCH 4/6] change alloc function in vmemmap_alloc

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Message-Id: <20100414091959.313c61b0.kamezawa.hiroyu@jp.fujitsu.com>
Date:	Wed, 14 Apr 2010 09:19:59 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	Minchan Kim <minchan.kim@...il.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Mel Gorman <mel@....ul.ie>, Bob Liu <lliubbo@...il.com>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	Christoph Lameter <cl@...ux-foundation.org>
Subject: Re: [PATCH 4/6] change alloc function in vmemmap_alloc_block

On Wed, 14 Apr 2010 00:25:01 +0900
Minchan Kim <minchan.kim@...il.com> wrote:

> if node_state is N_HIGH_MEMORY, node doesn't have -1.
> It means node's validity check is unnecessary.
> So we can use alloc_pages_exact_node instead of alloc_pages_node.
> It could avoid comparison and branch as 6484eb3e2a81807722 tried.
> 
> Cc: Christoph Lameter <cl@...ux-foundation.org>
> Signed-off-by: Minchan Kim <minchan.kim@...il.com>

Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>

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