Subject: Re: Hyperthreading Problem
To: Sridhar Ayengar <>
From: Frank van der Linden <>
List: tech-smp
Date: 01/25/2005 12:22:29
On Thu, Jan 20, 2005 at 10:19:18AM -0500, Sridhar Ayengar wrote:
> I was trying to get the "second CPU" enabled in my machine based on a 3GHz Pentium 4 with HyperThreading.  I have MPBIOS and MPACPI in the kernel, but my dmesg just says:
> (...)
> cpu1 at mainbus0: apid 1 (application processor)
> cpu1: not started
> (...)
> I have Hyperthreading turned on in the BIOS, and as you can see, cpu1 is being enumerated by the kernel.

Looks like you forgot the "MULTIPROCESSOR" option..

- Frank