Re: [2.6.0-test3] Hyperthreading gone

From: Greg Norris
Date: Sat Aug 09 2003 - 17:22:37 EST


Did you select CPU Enumeration Only, or "normal" ACPI? If the former,
did you specify the "acpismp=force" parameter at bootup?

On Sat, Aug 09, 2003 at 07:08:43PM +0200, Florian Weimer wrote:
> ACPI with CPU enumeration is enabled, but the sibling CPUs aren't
> activated.
>
> This is all what I have of the boot message (standard buffer size is
> too small, apparently):
>
> CPU: After all inits, caps: 3febfbff 00000000 00000000 00000080
> Intel machine check architecture supported.
> Intel machine check reporting enabled on CPU#3.
> CPU#3: Intel P4/Xeon Extended MCE MSRs (12) available
> CPU#3: Thermal monitoring enabled
> CPU3: Intel(R) Xeon(TM) CPU 1.40GHz stepping 01
> Total of 4 processors activated (11034.62 BogoMIPS).
> WARNING: No sibling found for CPU 0.
> WARNING: No sibling found for CPU 1.
> WARNING: No sibling found for CPU 2.
> WARNING: No sibling found for CPU 3.
>
> Recent 2.4.x kernels (starting with 2.4.20 IIRC) support
> Hyperthreading on this machine (Siemens Primergy H450).
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