On Wed, Jan 21, 2015 at 04:00:52PM +0800, Zhu Guihua wrote:
If you apply the folowing patchset [PATCH v3 0/7] cpu: add device_add foo-x86_64-cpu support https://lists.nongnu.org/archive/html/qemu-devel/2015-01/msg01552.html, and [PATCH v2 00/11] cpu: add i386 cpu hot remove support https://lists.nongnu.org/archive/html/qemu-devel/2015-01/msg01557.html, qemu can support hotplug and hot-unplug cpu device.
So this patch series will make libvirt support hotplug and hot-unplug cpu device for qemu driver, and now only supports one cpu driver which is 'qemu64-x86_64-cpu'.
Also I'm wondering how this interacts with CPU topology. eg lets say you configure a 16 vCPU guest, and set topology to 2 sockets, 4 cores, 2 threads. Does this hotplug allow you to plug/unplug individual threads - ie each invididual vCPU, or does it only allow plug/unplug of sockets - ie 8 vCPUs at a time in this topology. Regards, Daniel -- |: http://berrange.com -o- http://www.flickr.com/photos/dberrange/ :| |: http://libvirt.org -o- http://virt-manager.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: http://entangle-photo.org -o- http://live.gnome.org/gtk-vnc :|