[Fedora-xen] Intel VT and paravirtualized Guests?

Daniel P. Berrange berrange at redhat.com
Sat May 19 19:16:24 UTC 2007


On Fri, May 18, 2007 at 11:13:08PM +0200, Christian Reiter wrote:
> Hi!
> 
> Is there any advance in using a CPU which supports Intel VT
> when having only paravirtualized domUs?
> 
> Or does VT only help when there are fully virtualized Guests?

VT is only useful for fully virtualized guests. A paravirtualized guest is
already much faster than a fully-virt guest, regardless of VT.

> How do i enable the usage of VT in FC6's Xen?

There's nothing to enable[1] - if your CPU supports it, Xen will let you create
HVM guests, if your CPU doesn't support it, then you won't be able to use
HVM. 

Regards,
Dan.

[1] Well, ok VT may be disabled if your BIOS if using Intel CPUs.
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