Re: Hyperthreading

From: Hugh Dickins (
Date: Wed Aug 21 2002 - 12:33:09 EST

On Wed, 21 Aug 2002, James Bourne wrote:
> On Wed, 21 Aug 2002, Reed, Timothy A wrote:
> >
> > Can anyone lead me to a good source of information on what options should be
> > in the kernel for hyperthreading?? I am still fighting with a
> > sub-contractor over kernel options.
> As long as you have a P4 and use the P4 support you will get
> hyperthreading with 2.4.19 (CONFIG_MPENTIUM4=y). 2.4.18 you have to also
> turn it on with a lilo option of acpismp=force on the kernel command line.

You do need CONFIG_SMP and a processor capable of HyperThreading,
i.e. Pentium 4 XEON; but CONFIG_MPENTIUM4 is not necessary for HT,
just appropriate to that processor in other ways.


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