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

From: Will Schmidt <[email-masked]>
Date: Thu, 19 Oct 2006 15:37:09 -0500

On Thu, 2006-19-10 at 10:03 -0700, Christoph Lameter wrote:
> I would expect this patch to fix your issues. This will allow fallback 
> allocations to occur in the page allocator during slab bootstrap. This 
> means your per node queues will be contaminated as they were before. After 
> the slab allocator is fully booted then the per node queues will become 
> gradually become node clean.
> 
> I think it would be better if the PPC arch would fix this issue 
> by either making memory  available on node 0 or setting up node 1 as 
> the boot node.
> 

This didnt fix the problem on my box.  I tried this both against mm and
linux-2.6.git 

> Signed-off-by: Christoph Lameter <[email-masked]>
> 
> Index: linux-2.6.19-rc2-mm1/mm/slab.c
> ===================================================================
> --- linux-2.6.19-rc2-mm1.orig/mm/slab.c	2006-10-19 11:54:24.000000000 -0500
> +++ linux-2.6.19-rc2-mm1/mm/slab.c	2006-10-19 11:59:24.208194796 -0500
> @@ -1589,7 +1589,10 @@ static void *kmem_getpages(struct kmem_c
>  	 * the needed fallback ourselves since we want to serve from our
>  	 * per node object lists first for other nodes.
>  	 */
> -	flags |= cachep->gfpflags | GFP_THISNODE;
> +	if (g_cpucache_up != FULL)
> +		flags |= cachep->gfpflags;
> +	else
> +		flags |= cachep->gfpflags | GFP_THISNODE;
> 
>  	page = alloc_pages_node(nodeid, flags, cachep->gfporder);
>  	if (!page)
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