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

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Message-Id: <1177945387.5623.21.camel@localhost>
Date:	Mon, 30 Apr 2007 11:03:06 -0400
From:	Lee Schermerhorn <Lee.Schermerhorn@...com>
To:	Christoph Lameter <clameter@....com>
Cc:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>, ak@...e.de,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	akpm@...ux-foundation.org
Subject: Re: [PATCH] change global zonelist order on NUMA v2

On Thu, 2007-04-26 at 18:25 -0700, Christoph Lameter wrote:
> On Fri, 27 Apr 2007, KAMEZAWA Hiroyuki wrote:
> 
> > > DMA memory.
> > > 
> > It seems a bit complicated. If we do so, following can occur,
> > 
> > Node1: cpu0,1,2,3
> > Node0: cpu4,5,6,7
> 
> We were discussing a two node NUMA system. If you have more put it onto 
> the last.

Doesn't this [renumbering nodes] just move the problem to that "last"
node?  I.e., when one attempts to allocate normal memory from the last
node, it will overflow to the DMA zone.  What we need is for and DMA[32]
zone[s] to be last in [or excluded from?] the Normal/Movable/High/...
zonelist for each node.  That is what Kame's patch does.

Lee


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