linux-kernel - Re: [PATCH] change global zonelist order on NUMA v2

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Date:	Thu, 26 Apr 2007 17:51:37 +0200
From:	Andi Kleen <ak@...e.de>
To:	Christoph Lameter <clameter@....com>
Cc:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Linux-MM <linux-mm@...ck.org>, AKPM <akpm@...ux-foundation.org>
Subject: Re: [PATCH] change global zonelist order on NUMA v2

On Thursday 26 April 2007 17:46:35 Christoph Lameter wrote:

> 
> It is not a good idea if node 0 has both DMA and NORMAL memory and normal 
> memory is a small fraction of node memory. In that case lots of 
> allocations get redirected to node 1.

Good point yes. On x86-64 you might even have ZONE_DMA on node 0/1 and NORMAL
only on 3. I guess this needs to be detected somehow.

-Andi


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