Message-ID: <47BAFFD3.1070606@sgi.com>
Date: Tue, 19 Feb 2008 08:12:03 -0800
From: Mike Travis <travis@sgi.com>
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To: Mel Gorman <mel@csn.ul.ie>
CC: Andrew Morton <akpm@linux-foundation.org>, linux-kernel@vger.kernel.org,
       mingo@elte.hu, tglx@linutronix.de, Christoph Lameter <clameter@sgi.com>,
       Jack Steiner <steiner@sgi.com>
Subject: Re: 2.6.24 git2/mm1: cpu_to_node mapping to non-existant nodes causing
 boot failure
References: <20080203171634.58ab668b.akpm@linux-foundation.org> <20080213175241.GA327@csn.ul.ie> <47B33ACF.5030700@sgi.com> <20080214201727.GC30841@csn.ul.ie> <47B4A774.7050509@sgi.com> <20080215020208.GA6500@csn.ul.ie> <47B77E90.5050809@sgi.com>
In-Reply-To: <47B77E90.5050809@sgi.com>
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Mike Travis wrote:
> Mel Gorman wrote:
> 
>> If you send me patches to apply on top of 2.6.25-rc1, I'll give them a spin
>> on the machine in question. Reverting didn't work out very well as there are
>> too many collisions with patches that were applied later. I eventually got
>> the machine booting but it only succeeds because it only brings up one core
>> on each processor.  The patch, which is pretty brain damaged is below in case
>> it helps you guess what the real problem is. dmesg logs are attached of the
>> vanilla failure with acpi=debug and the log with the patch applied showing
>> "__cpu_up: bad cpu 1" and "__cpu_up: bad cpu3" (i.e. the second cores of
>> each machine).
>>
> 
> This should completely undo the change to 16 bit apic ids until we can figure
> out the problem with the memory-less nodes.  I checked it on both the numa
> and non-numa x86_64 box.
> 
> Thanks,
> Mike
> 

Hi Mel,

Did you get a chance to try out this patch to see if it cleared up the problem
booting on your x86_64 numa box?

Thanks,
Mike
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