linux-kernel - Re: [PATCH 4/5] x86: Add config variables for SMP

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Date:	Sat, 19 Jan 2008 13:39:06 -0800
From:	Mike Travis <travis@....com>
To:	Ingo Molnar <mingo@...e.hu>
CC:	Andrew Morton <akpm@...ux-foundation.org>, Andi Kleen <ak@...e.de>,
	Christoph Lameter <clameter@....com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/5] x86: Add config variables for SMP_MAX

Ingo Molnar wrote:
> * travis@....com <travis@....com> wrote:
> 
>> Adds and increases some config variables to accomodate larger SMP
>> configurations:
>>
>> 	NR_CPUS:      max limit now 4096
>> 	NODES_SHIFT:  max limit now 9
>> 	THREAD_ORDER: max limit now 3
>> 	X86_SMP_MAX:  say Y to enable possible cpus == NR_CPUS
>>
>> Signed-off-by: Mike Travis <travis@....com>
> 
> i've bisected a boot failure down to this patch (sans the THREAD_ORDER 
> bits): it causes an instant reboot of the 64-bit kernel upon bootup. 
> Failing config attached.
> 
> 	Ingo
> 

Thanks Ingo! 

I've pulled the THREAD_ORDER change from my next version of the patch.
Seems SMP_MAX is just not ready for prime time yet.

One problem that I'm having appears to be that the !NUMA config of the
current -mm version also doesn't boot so I haven't been able to verify
that.  (At least it doesn't seem to make it worse... ;-)

Thanks,
Mike
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