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Re: [Xen-users] How to virtualize Xen itself?

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Subject: Re: [Xen-users] How to virtualize Xen itself?
From: Mark Williamson <mark.williamson@xxxxxxxxxxxx>
Date: Tue, 4 Dec 2007 03:51:27 +0000
Cc: Razi Khaja <razi.khaja@xxxxxxxxx>, Allen Fowler <allen.fowler@xxxxxxxxx>, "Fajar A. Nugraha" <fajar@xxxxxxxxxxxxx>, Tom Brown <xensource.com@xxxxxxxxxxxxxxxxxxx>
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> >> To further add to this question, Is it possible to run a "Xen server"
> >> inside a "Xen VM"?
> >
> > No.
> NO... because virtual machines run under a hypervisor, not "inside" a
> guest operating system... (knowing the reason helps understand the
> answer.)

Actually you can run a Xen with PV guests inside an HVM virtual machine hosted 
by Xen.  I generally run a known-good Xen on my test machine and then run 
development versions of Xen inside HVM virtual machines.

You *can't* run Xen in a PV domain for the reason Tom stated, so if you don't 
have HVM-capable hardware this won't work.

It's not possible to run HVM-capable Xen *inside* an HVM virtual machine 
because Xen can't currently support nesting HVM.


Dave: Just a question. What use is a unicyle with no seat?  And no pedals!
Mark: To answer a question with a question: What use is a skateboard?
Dave: Skateboards have wheels.
Mark: My wheel has a wheel!

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