Re: [Xen-devel] Vcpu allocation for a newly created domU

[Sandesh <sandesh.ahiremath@xxxxxxxxx>]

On Wed, 2008-06-18 at 17:09 +0100, Grzegorz MiÅoÅ wrote:
> >> > 1. So how will dom0 relinquish/share vcpu to/with a newly created domU.
> >> > Does this happen as part of the shared_info page mapping??
> >>
> >> vcpus are created for each new domain, they are not shared with Dom0.
> > in xen/arch/x86/setup.c right after domain_create(0,0, DOM0_SSIDREF)
> > which creates dom0, alloc_vcpu(dom0..) is called which will allocate
> > vcpu for dom0. Then in construct_dom0 alloc_vcpu is called for
> > dom0_max_cpus. So aren't all vcpu's getting allocated to dom0??
> >
> > Or is it that domU will get allocated separate vcpu's, irrespective of
> > these above vcpu's??
>
> Each domain, Dom0 and any DomU, will get separate VCPU(s). These are
> dynamically bound/run on physical CPUs.
Ok, thanks for the clarifications.
>
> Cheers
> Gr(z)egor(z)


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