How do I turn off hyperthreading on 6.0 ?

[Pete French]

> What do
>
> # sysctl machdep.hlt_cpus
> # sysctl machdep.logical_cpus_mask
> # sysctl machdep.hyperthreading_allowed

	machdep.hlt_cpus: 10
	machdep.logical_cpus_mask: 10
	machdep.hyperthreading_allowed: 0

-pete.