[Gllug] running Xen on another VM

[Nahuel Marisi]

What I feared. Oh well, thanks for all the help, I'll guess I need a new
system to play with.

On 8/20/08, Richard Jones <rich at annexia.org> wrote:
>
> On Wed, Aug 20, 2008 at 02:58:51PM +0100, Peter Corlett wrote:
> > On Wed, Aug 20, 2008 at 01:44:13PM +0100, Nahuel Marisi wrote:
> > [...]
> > > I was wondering if I can actually virtualize Xen in Virtualbox or other
> > > similar (preferably open source or free) VM.
> >
> > In theory it should be possible to nest virtual servers indefinitely -
> and
> > you can do this on S/390 - but in practice it doesn't really work on x86
> and
> > you'd be better off scrounging another PC from somewhere and using that.
>
> It's not possible even in theory on a PC.  Unlike mainframes, neither
> paravirtualization (as in Xen) nor hardware virtualization can be
> nested.
>
> Also, full emulators like Bochs don't emulate the hardware accurately
> enough that you can run Xen or KVM inside them.  I know, coz I tried
> it once.
>
> You can however run QEMU inside a KVM guest, although it's really
> slow.  We do this for testing oVirt out on single developer machines.
>
> Rich.
>
> --
> Richard Jones
> Red Hat
> --
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