On Mon, Jun 06, 2016 at 02:07:46PM +0100, Stefano Stabellini wrote: > On Mon, 6 Jun 2016, Jan Beulich wrote: > > >>> On 03.06.16 at 18:35, <wei.l...@citrix.com> wrote: > > > I got a patch ready. But QEMU upstream refuses to start on the receiving > > > end > > > with following error message: > > > > > > qemu-system-i386: Unknown savevm section or instance 'cpu_common' 1 > > > qemu-system-i386: load of migration failed: Invalid argument > > > > > > With QEMU traditional HVM guest and PV guest, the guest works fine -- up > > > and running with all hot plugged cpus available. > > > > > > So I think the relevant libxl information is transmitted but we also > > > need to fix QEMU upstream. But that's a separate issue. > > For clarity, you have applied the patch below, started a VM, hotplugged > a vcpu, rebooted the guest, then migrated the VM, but at this point > there is an error? >
Apply this patch, start a guest, hotplug some cpus, make them online inside guest, and xl migrate guest localhost. You will see this in qemu log. > What are the QEMU command line arguments at the receiving side? Are you > sure that the increased vcpu count is passed to the receiving end by > libxl? It looks like QEMU has been started passing the old vcpu count as > command line argument (-smp etc) at the receiving end. > The QEMU command line should be the same on the sending side. The -smp 1,maxvcpus=4 (something like that). Does that mean we need to somehow alter QEMU's command line? Wei. _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
