linux-kernel - Re: [RFC, PATCH] SLAB : [NUMA] keep nodeid in struct page instead of struct slab

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Message-ID: <20070321160929.GB25583@one.firstfloor.org>
Date:	Wed, 21 Mar 2007 17:09:29 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	Pekka J Enberg <penberg@...helsinki.fi>
Cc:	Christoph Lameter <christoph@...eter.com>,
	Eric Dumazet <dada1@...mosbay.com>,
	Andi Kleen <andi@...stfloor.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux kernel <linux-kernel@...r.kernel.org>
Subject: Re: [RFC, PATCH] SLAB : [NUMA] keep nodeid in struct page instead of struct slab

On Wed, Mar 21, 2007 at 05:42:22PM +0200, Pekka J Enberg wrote:
> On Wed, 21 Mar 2007, Christoph Lameter wrote:
> > None of that please. The page flags already contain a node number that is 
> > accessible via page_to_nid(). Just make sure that we never put a slab onto 
> > the wrong node.
> 
> Oh well, here's a patch to find out. (I don't have a NUMA box.)

You can always use numa emulation on x86-64.  Boot with numa=fake=NODES

-Andi
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