Re: Dell Poweredge 2600 SMP

Mikael Pettersson (mikpe@csd.uu.se)
Thu, 14 Nov 2002 18:41:55 +0100

Daniel Podlejski writes:
> Any ideas why Linux 2.4.19, 2.4.20-rc1 and -rc1-ac1 with megaraid
> driver from http://www.domsch.com/linux/megaraid/ detects four CPUs,
> when olny two are on board ?

Because
1) it has two hyperthreaded Xeon processors, each of which contains
two logical CPUs, and
2) you didn't disable hyperthreading in the BIOS.

Sigh. This is becoming a FAQ...
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