From mboxrd@z Thu Jan  1 00:00:00 1970
From: Dario Faggioli <dario.faggioli@citrix.com>
Subject: Re: Xen does not work after changing scheduler's code
Date: Wed, 27 Apr 2016 17:21:50 +0200
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To: tutu sky <ooohooo_u@hotmail.com>
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On Wed, 2016-04-27 at 14:58 +0000, tutu sky wrote:
> Thanks Dario,
> =C2=A0and then, i don't understand what is your meaning by:
>=20
> "That's a valid use case, and there are people doing it a log, and
> you
> don't even need VMWare to do that."
>=20
> Do you mean that for developing/debugging three is no need for using
> vmware?
>=20
Exactly. Developing and debugging is a valid use case for nested
virtualization.

Nested virtualization means that you run an hypervisor (let's call it
level-1) as a guest of another (level-0) hypervisor.

What I think you are doing is using some version of vmware as level-0,
and then Xen as level-1.

And what I meant is that you can just use Xen at both levels.

Note that I don't know if it would be easier or harder, or in general
better or worse, to do so (as compared to what you are doing right
now). I only wanted to mention that it is possible.

This page may have more information (although, I'm not sure how updated
it is):
http://wiki.xenproject.org/wiki/Nested_Virtualization_in_Xen

Dario
--=20
<<This happens because I choose it to happen!>> (Raistlin Majere)
-----------------------------------------------------------------
Dario Faggioli, Ph.D, http://about.me/dario.faggioli
Senior Software Engineer, Citrix Systems R&D Ltd., Cambridge (UK)


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