Re: [Xen-users] Xen Not Support multi-cpu??

[Xin Chen <xcheney@xxxxxxxxxxxxxx>]

Cool!
Thanks u guys:)

cheers!
xin

Petersson, Mats wrote:

>  
>
> > -----Original Message-----
> > From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx 
> > [mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Xin Chen
> > Sent: 13 March 2007 01:55
> > To: xen-users@xxxxxxxxxxxxxxxxxxx
> > Subject: Re: [Xen-users] Xen Not Support multi-cpu??
> >
> > OK! I see now. For guest system, they only know virtual cpu 
> > which domain 
> > 0 made.Domain0 is incharge of real cpus.
> > Great. Thanks!
> >    
> To be VERY PEDANTIC: VCPU's are what ALL domains "know". The REAL CPU's
> are handled by the hypervisor only. Whilst it's true that Dom0 gives the
> instructions about how many real and virtual CPU's a guest should use,
> it still is the hypervisor that enforces, controls and guarantees this. 
>
> Dom0 in the sense of the Hypervisor is another guest - it just so
> happens that it's got the "privileged flag" set. Think of Dom0 as a
> "root" user in Unix, and DomU as a "regular user", and you get the idea.
>
> --
> Mats
>
>
>  

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