linux-kernel - Re: kernel BUG in __cache_alloc_node at linux-2.6.git/mm/slab.c:3177!

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Date:	Fri, 20 Oct 2006 10:19:25 -0500
From:	Will Schmidt <will_schmidt@...t.ibm.com>
To:	Andy Whitcroft <apw@...dowen.org>
Cc:	Christoph Lameter <clameter@....com>,
	Anton Blanchard <anton@...ba.org>, akpm@...l.org,
	linuxppc-dev@...abs.org, linux-kernel@...r.kernel.org,
	Mel Gorman <mel@....ul.ie>, Mike Kravetz <kravetz@...ibm.com>
Subject: Re: kernel BUG in __cache_alloc_node at
	linux-2.6.git/mm/slab.c:3177!

On Fri, 2006-20-10 at 15:18 +0100, Andy Whitcroft wrote:
> Paul Mackerras wrote:
> > Christoph Lameter writes:
> > 

I got dropped off the CC list somewhere..  :-(     

if something is bouncing, let me know,.. otherwise please dont do
that.. 


> Mel Gorman and I have been poking at this from different ends.  Mel from
> the context of this thread and myself trying to fix a machine which was
> exhibiting on 32MB of ram in node 0 and the rest in node 1.
> 
> 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"
> 
> These commits:
> 	f62859bb6871c5e4a8e591c60befc8caaf54db8c
> 	a94b3ab7eab4edcc9b2cb474b188f774c331adf7
> 
> I'll follow up to this email with the reversion patch we used in
> testing.  It seems to sort this problem out at least, though now its
> blam'ing in ibmveth, so am retesting with yet another patch.  This patch
> reverts the two patches above and updates the commentry on the Kconfig
> entry.

I've got a couple LPARs that exhibit the problem, so can verify your
patch once I see it.. 

-Will


> 
> -apw

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