linux-kernel - Re: [PATCH 1/6] Remove node's validity check in alloc

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Message-Id: <20100414090413.71376da1.kamezawa.hiroyu@jp.fujitsu.com>
Date:	Wed, 14 Apr 2010 09:04:13 +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
Subject: Re: [PATCH 1/6] Remove node's validity check in alloc_pages

On Wed, 14 Apr 2010 00:24:58 +0900
Minchan Kim <minchan.kim@...il.com> wrote:

> alloc_pages calls alloc_pages_node with numa_node_id().
> alloc_pages_node can't see nid < 0.
> 
> So we can use alloc_pages_exact_node instead of alloc_pages_node.
> It could avoid comparison and branch as 6484eb3e2a81807722 tried.
> 
> Cc: Mel Gorman <mel@....ul.ie>
> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
> Signed-off-by: Minchan Kim <minchan.kim@...il.com>

Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujisu.com>



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