On Thu, 2015-01-22 at 10:04 +0000, Daniel P. Berrange wrote:
On Thu, Jan 22, 2015 at 04:57:39PM +0800, Zhu Guihua wrote:
On Wed, 2015-01-21 at 09:57 +0000, Daniel P. Berrange wrote:
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.
qemu has not interacted with CPU topology so for. So now we focus on this feature's realization in a simple way.
What do you mean by that ? eg which impl I describe above will it support ?
Only allow plug/unplug of sockets. Regards, Zhu
Regards, Daniel