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

["Grzegorz Miłoś" <gm281@xxxxxxxxx>]

>> > 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.

Cheers
Gr(z)egor(z)

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