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

[Andrey Korolyov]

On Fri, Jan 9, 2015 at 1:26 PM, Alexandre DERUMIER <address@hidden> wrote:
> 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 ?
>

Did you populated appropriate topology in arguments? As far as I can
remember from pre-1.1 era CPU hotplug not worked with windows, so it
should be neither lack of configured NUMA or a simply OS-specific
issue.