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RE: [Xen-users] XEN hardware compatibility list

> > +1, agreed.  The answer with HT is always very much "It 
> depends".  The
> > exception is that it's generally a good thing to run dom0 
> > concurrently, in a separate thread from the domUs.  This 
> improves IO 
> > performance, particular on UP systems (not too sure how it 
> fits in the 
> > Xen performance picture on SMP systems).
> As I read this, I was wondering if Xen has a boot parameter 
> for enabling / disabling hyperthread, ala the "noht" option 
> in linux (in fact, I cannot find the noht flag in the Linux 
> 2.6.12 source either)?  However I did come across some 
> patches on the xen-changelog archive that refer to the noht 
> flag, so it seems it was there at one time.

There's no need to disable HT on the command line -- you can choose to
use it or not at run time depending on how you assign domains' VCPUs to
physical CPUs.


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