linux-kernel - Re: SMP broken on pre-ACPI machine.

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Message-ID: <20061019201116.GG26530@redhat.com>
Date:	Thu, 19 Oct 2006 16:11:16 -0400
From:	Dave Jones <davej@...hat.com>
To:	Len Brown <lenb@...nel.org>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	linux-acpi@...r.kernel.org
Subject: Re: SMP broken on pre-ACPI machine.

On Thu, Oct 19, 2006 at 03:16:44PM -0400, Dave Jones wrote:

 > Why smp_found_config isn't set in that guys configuration is a mystery to me,
 > as his MPS tables look sane..
 > 
 > MP Table:
 > #	APIC ID	Version	State		Family	Model	Step	Flags
 > #	 0	 0x10	 BSP, usable	 6	 2	 1	 0x0381
 > #	 0	 0x10	 AP, usable	 6	 1	 7	 0xfbff
 > 
 > Hmm, wait, he has unpaired CPUs. I wonder if that's the reason.
 > I know *some* combinations of PPro's are valid to be paired, but I'll
 > need to dig out the old docs to be sure.
 
Ok, after reading http://www.intel.com/design/archives/processors/pro/docs/242689.htm
I'm more puzzled than ever.  There never was a model 2 Pentium Pro.
Either this BIOS is on crack and putting nonsense in its MPS tables,
or this is a hardware flaw of some sort.

	Dave

-- 
http://www.codemonkey.org.uk
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