[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] RE: [Xen-users] Xen Not Support multi-cpu??
> -----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 _______________________________________________ Xen-users mailing list Xen-users@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-users
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