Fedora And Virtualization

[Pasi Kärkkäinen]

On Wed, Aug 19, 2009 at 09:42:44AM -0400, Tom Horsley wrote:
> On Wed, 19 Aug 2009 08:43:52 -0430
> Patrick O'Callaghan wrote:
> 
> > Not necessarily true. I think the Xen people claim their product can
> > actually be faster without hardware virtualization in some
> > circumstances.
> 
> True. The xen paravirtualization is indeed fast, but needs kernel
> support in the VM with a paravirt aware kernel, which you can get for
> linux kernels (sometimes, depending on the current state of
> patches), but can't get for things like Windows.

http://wiki.xensource.com/xenwiki/XenParavirtOps
http://fedoraproject.org/wiki/Features/XenPvops

Upstream Linux kernel contains pv_ops Xen domU (guest) support since 2.6.23.
So the vanilla/mainline Linux kernel can be used as Xen domU (guest) out-of-the-box. 

Fedora 10 and Fedora 11 run as Xen domU (guest), using the same/default kernel as baremetal.

Xen dom0 (host) is a different thing. pv_ops Xen dom0 support is still under
development, and it's not yet in mainline Linux kernel.

Information about different dom0 capable kernels:
http://wiki.xensource.com/xenwiki/XenDom0Kernels

And: http://fedoraproject.org/wiki/Features/XenPvopsDom0

-- Pasi

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