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xen-users
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.
Ian
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