kern/94410: Cannot disable hyperthreading if more than one physical processor exists

[Boris Kochergin]

Pete French wrote:
>> Is this still a problem with recent versions of FreeBSD?
>>     
>
> Unfortunbatrly I no longer have any machines with multiple hyperthreading
> processors, as we have upgraded all the machines to twin core processors.
> Sorry for not being able to give a more recent report on this.
>
> -pcf.
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I can confirm that it's not a problem in 6.2-RELEASE/amd64. With the 
machdep.hyperthreading_allowed set to 0, a machine I have with dual 
hyperthreaded 2.8GHz Xeons will no longer schedule processes for 
"hyperthreading" CPUs.

-Boris