Gleb Natapov wrote:
Currently we didn't test it with Windows 2008 datacenter.
However, similar patch we also used for Xen (now already in Xen upstream). At Xen side, our QA team has tested with Windows 2008 datacenter. For vcpu hot-add, it worked well, the new CPUs can be found on both device manager and task manager. For vcpu hot-remove, as you said, it cannot work since cpu hot-remove is not supported by any Windows yet.
At KVM side, we test the patch with linux 2.6.32, vcpu hot-add and hot-remove both worked well. If you need, we can co-work with our QA to test our KVM patch with Windows 2008 datacenter.
It will be very helpful! Can you ask them to test the patch please?
Gleb,
Shaohui has done KVM vcpu hotplug test with Windows 2008 datacenter. For vcpu hot-add, new CPUs can be found on device manager. Thanks a lot for Shaohui's help!
Regards, Jinsong