Re: Kernel for Pentium 4 hyperthreading?

From: Dave Jones (
Date: Sun Dec 15 2002 - 14:17:48 EST

On Sun, Dec 15, 2002 at 12:40:59PM -0500, Scott Robert Ladd wrote:
> Dave Jones wrote:
> > Ah, apologies. Yes. In this case, you win. I bit the same problem you
> > had btw with this box in 2.4. You need an updated BIOS. Contact Intel.
> I'll ask Intel if there's a BIOS update. Computers are almost as bad as
> games now; the first thing you need to do before using them is patch!
> What evokes my curiosity is that the 2.5.51 kernel detects and correctly
> uses the processor siblings, while 2.4.20 does not. Given that 2.5.51 is
> running quite well, I think I'll just stay on the bleeding edge of Linux for
> a while.

I think the problem was a missing MP table in the factory-shipped BIOS.
2.5 used ACPI to enumerate the siblings, whereas the 2.4 ACPI is a
little out of date in that department.
At least that was my random guess when I hit that problem.


| Dave Jones.
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