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

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Message-ID: <Pine.LNX.4.64.0703210842180.3160@graphe.net>
Date:	Wed, 21 Mar 2007 08:43:30 -0700 (PDT)
From:	Christoph Lameter <christoph@...eter.com>
To:	Pekka Enberg <penberg@...helsinki.fi>
cc:	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, 21 Mar 2007, Pekka Enberg wrote:

> On 3/21/07, Christoph Lameter <christoph@...eter.com> 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.
> 
> Sounds good. Do you know for a fact that we don't or are you just
> afraid we have a bug?

I tried to clean it up during the GFP_THISNODE work but there was some 
issue on powerpc where we needed fallback for bootstrap. There may be more 
trouble there. Checking the allocs where we do not use GFP_THISNODE should 
get you there.

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