[Pkg-libvirt-maintainers] Bug#742076: Bug#742076: libvirt-bin: setvcpus command fails to shrink the numbers of vcpu

[Guido Günther]

Hi,
> While on the guest side a cat /proc/cpuinfo still gives back two cpu available.

This needs support from qemu and (at least last time I checked) a
running guest agent. This isn't available in wheezy so you should see
the updated CPUs after reboot only. See. e.g.:

   http://lost-and-found-narihiro.blogspot.ch/2013/10/fedora-19-kvm-cpu-hotplug-with-qemu.html 

So libvirt tries to cope with it.
Cheers,
 -- Guido