Re: Hyperthreading and physical/logical CPU identification

[Martin J. Bligh]

> The problem is, I have 4 physical processors, but kernel.org kernels so far 
> do not recognize all of them.  2.4.18 will find 3, while 2.5.11 will find 
> only 2 (BIOS hyperthreading support off, no acpismp=force).  However, on 
> 2.5.11, if I enable hyperthreading (thru BIOS and acpismp=force, I see 4 
> processors.  

When you say the kernel doesn't recognise all of the physical processors, 
do you mean it doesn't see them in the MPS/ACPI table, or that they fail to 
boot? Can you post your boot log?

I see you have a "us.ibm.com" email address ... is this machine an x440,
one of it's smaller brethren, or something totally different?

M.