linux-kernel - Re: [BUG] x86: bootmem broken on SGI UV

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Date:	Sat, 9 Oct 2010 07:59:45 -0500
From:	Russ Anderson <rja@....com>
To:	Yinghai Lu <yinghai@...nel.org>
Cc:	linux-kernel <linux-kernel@...r.kernel.org>, tglx@...utronix.de,
	"H. Peter Anvin" <h.peter.anvin@...el.com>,
	Jack Steiner <steiner@....com>, rja@...ricas.sgi.com
Subject: Re: [BUG] x86: bootmem broken on SGI UV

Yes, Yinghai's patch fixes the problem.
Thank you very much.


On Fri, Oct 08, 2010 at 03:57:31PM -0700, Yinghai Lu wrote:
> On 10/08/2010 02:34 PM, Russ Anderson wrote:
> 
> After looking at the changelog, it turns out it is broken for a while by
> following commit
> 
> |commit 8716273caef7f55f39fe4fc6c69c5f9f197f41f1
> |Author: David Rientjes <rientjes@...gle.com>
> |Date:   Fri Sep 25 15:20:04 2009 -0700
> |
> |    x86: Export srat physical topology
> 
> before that commit, register_active_regions() is called SRAT memory entries.
> 
> Try to use nodememblk_range[] instead of nodes[].
> 
> For stable tree: from 2.6.33 to 2.3.36 need this patch by
> changing memblock_x86_register_active_regions() with e820_register_active_regions()
> 
> Reported-by: Russ Anderson <rja@....com>
> Signed-off-by: Yinghai Lu <yinghai@...nel.org>
> Cc: stable@...nel.org
> 
> ---
>  arch/x86/mm/srat_64.c |    8 +++++---
>  1 file changed, 5 insertions(+), 3 deletions(-)
> 
> Index: linux-2.6/arch/x86/mm/srat_64.c
> ===================================================================
> --- linux-2.6.orig/arch/x86/mm/srat_64.c
> +++ linux-2.6/arch/x86/mm/srat_64.c
> @@ -421,9 +421,11 @@ int __init acpi_scan_nodes(unsigned long
>  		return -1;
>  	}
>  
> -	for_each_node_mask(i, nodes_parsed)
> -		memblock_x86_register_active_regions(i, nodes[i].start >> PAGE_SHIFT,
> -						nodes[i].end >> PAGE_SHIFT);
> +	for (i = 0; i < num_node_memblks; i++)
> +		memblock_x86_register_active_regions(memblk_nodeid[i],
> +						node_memblk_range[i].start >> PAGE_SHIFT,
> +						node_memblk_range[i].end >> PAGE_SHIFT);
> +
>  	/* for out of order entries in SRAT */
>  	sort_node_map();
>  	if (!nodes_cover_memory(nodes)) {

-- 
Russ Anderson, OS RAS/Partitioning Project Lead  
SGI - Silicon Graphics Inc          rja@....com
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