Re: [Qemu-devel] VCPU Hot-Unplug Feature

[Alexandre DERUMIER <aderumier@odiso.com>]

Hi,

they are a lot of patches sent on the mailing list recently,

cpu hotplug|unplug with device_add|del

https://www.redhat.com/archives/libvir-list/2015-February/msg00084.html



----- Mail original -----
De: "Fahri Cihan Demirci" <cihand@skyatlas.com>
À: "qemu-devel" <qemu-devel@nongnu.org>
Envoyé: Lundi 4 Mai 2015 18:24:43
Objet: [Qemu-devel] VCPU Hot-Unplug Feature

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