[Qemu-devel] cpu hotplug and windows guest (win2012r2)

[Alexandre DERUMIER]

Hi,

I'm currently testing cpu hotplug with a windows 2012R2 standard guest,

and I can't get it too work. (works fine with linux guest).

host kernel : rhel7 3.10 kernel
qemu 2.2


qemu command line : -smp cpus=1,sockets=2,cores=1,maxcpus=2

Started with 1cpu, topogoly is 2sockets with 1cores.


Then

qmp# cpu-add 1


I can see a new cpu is windows device manager, and event log in the device said 
that it's online.

So it should be ok, but.

I can't see new processor in taskmanager or perfmon. (I had tried to relaunch 
them to be sure.).


So, it is a windows bug ? Does I need to do something else ?