Re: [Xen-users] XEN in VirtualBox?

["Todd Deshane" <deshantm@xxxxxxxxx>]

On Feb 17, 2008 1:57 AM, Sadique Puthen <sputhenp@xxxxxxxxxx> wrote:

Mike Lovell wrote:
> hakinchen wrote:
>> Hi,
>>
>> i use Virtual Box and want to try XEN in it.
>> All is possible but i cannot not install a self made OS.
>> "HVM" Problem.
>>
>> Normally Virtual Box use VT-technologie but i don't now XEN can use
>> them still at time?
>> Virtual in Virtual ist this possible with VB or something els
>> VirtualMachine-Software?

This sort of things should only be done for testing purposes and just to
check whether nesting actually works or not and that is the end of life.
These sort of things doesn't really yield any  values. Two days before,
I had a test running  xen  dom0 as a vmware guest and running domu in
that dom0. Paravirtualized guest can start successfully.  The end result
was that, performance was worst than sluggish that I could ever imagine,
random crashes, random hangup and etc...

None of the virtualization technology is designed for nesting, so no one
can get any value out of it.

Some people have reported running Xen on top of Xen HVM for development purposes. I think there are places where value can be gained for some cases.


 

--Sadique

>>
>>
>> Great day and fell fine
>>
>> hackinchen
> Xen will probably work inside of VirtualBox but I doubt that you will
> be able to get a HVM guest to work. Most virtualization technologies
> do not pass thru the VT or SVM capabilities of the processor to the
> guest OS (in your case, your Xen installation). So as far as Xen
> knows, it is running on a machine that does not support VT or SVM. You
> can check this by doing `cat /proc/cpuinfo` and looking for vmx in the
> flags area. You should be able to install PV guests though. If you are
> wanting to just experiment with Xen, doing it in VirtualBox  is
> alright. But I would not recommend it for a regular Xen installation.
> Hope that answers your question.
>
> Mike Lovell
>
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> http://lists.xensource.com/xen-users
>


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