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Subject: RE: P4 3.06Ghz Hyperthreading with 2.4.20?
Date: Wed, 19 Mar 2003 18:50:59 -0800
Message-ID: <3014AAAC8E0930438FD38EBF6DCEB564013393B6@fmsmsx407.fm.intel.com>
Thread-Topic: P4 3.06Ghz Hyperthreading with 2.4.20?
Thread-Index: AcLugQjl5Np7ACULRcykNlsSf8zmeQACW37w
From: "Nakajima, Jun" <jun.nakajima@intel.com>
To: "James Wright" <james@jigsawdezign.com>, <linux-kernel@vger.kernel.org>
Sender: linux-kernel-owner@vger.kernel.org
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You need to apply the ACPI patch: http://sourceforge.net/projects/acpi and *configure* APIC. 

The 2.4 kernel depends on the MPS table for all but logical processors. If MPS table is not present, it will fall back to UP.

Thanks,
Jun

> -----Original Message-----
> From: James Wright [mailto:james@jigsawdezign.com]
> Sent: Wednesday, March 19, 2003 5:34 PM
> To: linux-kernel@vger.kernel.org
> Subject: P4 3.06Ghz Hyperthreading with 2.4.20?
> 
> Hello,
> 
>    I have kernel 2.4.20 with a single P4 3.06Ghz CPU and Asus P4G8X
> motherboard
> (with the Intel E7205) Chipset. I have enabled Hyperthreading in the BIOS
> options,
> compiled in SMP & ACPI support, and also tried adding "acpismp=force" to
> my lilo
> kernel cmdline, but it just doesn't seem to detect the second Logical CPU.
> My
> current theory is that this is bcos Linux expects the motherboard to be an
> SMP
> item (as with the Xeon boards) but this board is a Single processor board,
> ansd
> doesn't have an MP table, but the cpu info is held in the ACPI tables.?!?
> 
> I have tried installing 2.5.65 but can't get past the compile due to
> compile-time
> errors... Is this a known problem? SHall i just disable Hyperthreading
> until a new
> kernel release?
> 
> 
> Thanks,
> James
> 
> 
> 
> -
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