Hello, We are interested in being able to remove a VCPU from an active Libvirt domain running under QEMU/KVM. However, currently that does not seem to be possible because QEMU does not provide an interface for hot-unplugging a VCPU. The corresponding feature page [1] on the QEMU wiki mentions the cpu-add interface and the generalized device add/del interface. So, my question is, is there someone working on a cpu-remove interface or making progress in the generalized device add/del interface to hot-unplug VCPUS? If you are in any way interested in or planning such a feature, we may provide feedback, testing or help in the development effort. Any other input, guidance or corrections would be also most welcome. Thank you.
[1] http://wiki.qemu.org/Features/CPUHotplug Best regards, Fahri Cihan Demirci