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Date: Fri, 20 Oct 2006 07:59:45 -0700
From: Mike Kravetz <kravetz@us.ibm.com>
To: Andy Whitcroft <apw@shadowen.org>
Subject: Re: kernel BUG in __cache_alloc_node at linux-2.6.git/mm/slab.c:3177!
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Cc: akpm@osdl.org, Mel Gorman <mel@csn.ul.ie>, linux-kernel@vger.kernel.org,
	linuxppc-dev@ozlabs.org, Paul Mackerras <paulus@samba.org>,
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On Fri, Oct 20, 2006 at 03:18:52PM +0100, Andy Whitcroft wrote:
> I remember that we used to have code to cope with this in the ppc64
> architecture, indeed I remember reviewing it all that time ago.  Looking
> at the current state of the tree it was removed in the two patches below
> in mainline:
> 	"[PATCH] Remove SPAN_OTHER_NODES config definition"
> 	"[PATCH] mm: remove arch independent NODES_SPAN_OTHER_NODES"

That was me.  Seem to remember some discussion that these were only
needed for DISCONTIGMEM, so I removed them when the DISCONTIGMEM option
for power went away.  But, that is clearly NOT the case.  Appears that
SPARSEMEM and the old slab code covered up the issue.  Sorry about that.

Thanks!
-- 
Mike