6-stable and HTT P4

[Pete French]

> > Just got it to work though... Had to add 
> > machdep.hyperthreading_allowed=1 to loader.conf in addition to 
> > hlt_logical_cpus=0
>
> Great. FYI, HTT will give you little or even negative performance benefits.

Heh - I still cant persuade my 6.0-RELEASE to *not* use hyperthreading!
have got hyperthreading_allowed set to 0, hlt_logical_cpus set to 1 and
it sttill shcedules things on 4 CPU's rather than 2.

-pcf.