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xen-devel
Re: [Xen-devel] vcpu-set and save/restore/reboot
On Fri, Apr 27, 2007 at 07:41:30PM +0100, Keir Fraser wrote:
> > We've noticed in 3.0.4 (and it seems to be intentional) that if you
> > vcpu-set a domain to fewer CPUs, when it restarts (restore or reboot),
> > only those VCPUs are present in xenstore or the domain. This seems
> > strange at least? It's unfortunate since it means the domain can never
> > get those VCPUs back.
>
> Max_vcpus should still be set to its original build-time value, so the guest
> kernel should still be aware that the maximal number of vcpus *could* exist.
> And the nodes should still exist in xenstore, but marked offline.
This is not the case with 3.0.4 at least. When I reboot a domain I don't
see any entries past the ones we set. I haven't had a chance to test
3.0.5 yet, but it seems to have similar code.
regards
john
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