[libvirt] [Qemu-devel] ask a question

[Stefan Hajnoczi]

On Wed, Aug 16, 2017 at 02:25:19PM +0800, 皮智 wrote:
> Hi，I meet a problem with vm, my environment is qemu-kvm-2.3,
> virtio-win-0.1.126, host(centos7.2), guest(windows10).
> 
> libvirt xml has four virtio-serial channel as follows:

CCing the libvirt mailing list.  This may be a libvirt issue.

>     <channel type='spicevmc'>
>       <target type='virtio' name='com.redhat.spice.0' state='connected'/>
>       <alias name='channel0'/>
>       <address type='virtio-serial' controller='0' bus='0' port='1'/>
>     </channel>
>     <channel type='unix'>
>       <source mode='bind'
> path='/var/lib/libvirt/qemu/e597eab9-95db-46e9-96f0-12a84c692569'/>
>       <target type='virtio' name='pv-mon' state='connected'/>
>       <alias name='channel1'/>
>       <address type='virtio-serial' controller='0' bus='0' port='2'/>
>     </channel>
>     <channel type='unix'>
>       <source mode='bind'
> path='/var/lib/libvirt/qemu/e597eab9-95db-46e9-96f0-12a84c692569-qga'/>
>       <target type='virtio' name='org.qemu.guest_agent.0'
> state='connected'/>
>       <alias name='channel2'/>
>       <address type='virtio-serial' controller='0' bus='0' port='3'/>
>     </channel>
>     <channel type='unix'>
>       <source mode='bind'
> path='/var/lib/libvirt/qemu/e597eab9-95db-46e9-96f0-12a84c692569-report'/>
>       <target type='virtio' name='qga-active-report' state='connected'/>
>       <alias name='channel3'/>
>       <address type='virtio-serial' controller='0' bus='0' port='4'/>
>     </channel>
> 
> If I hard reboot the vm, it may happen as follows:
> 
> 2017-08-14T07:51:18.401008Z qemu-kvm: virtio-serial-bus: Unexpected port id
> 1122983520 for device virtio-serial0.0
> 2017-08-14T07:51:18.956482Z qemu-kvm: virtio-serial-bus: Guest failure in
> adding device virtio-serial0.0
> 2017-08-14T07:51:29.176795Z qemu-kvm: virtio-serial-bus: Guest failure in
> adding device virtio-serial0.0
> 2017-08-14T07:51:34.454819Z qemu-kvm: virtio-serial-bus: Unexpected port id
> 2042451128 for device virtio-serial0.0
> 2017-08-14T07:51:44.655068Z qemu-kvm: virtio-serial-bus: Guest failure in
> adding device virtio-serial0.0
> 2017-08-14T07:51:49.764201Z qemu-kvm: virtio-serial-bus: Unexpected port id
> 1122983520 for device virtio-serial0.0
> 2017-08-14T07:51:59.969836Z qemu-kvm: virtio-serial-bus: Guest failure in
> adding device virtio-serial0.0
> 2017-08-14T07:52:21.564461Z qemu-kvm: virtio-serial-bus: Unexpected port id
> 1122983520 for device virtio-serial0.0
> 2017-08-14T07:52:47.059452Z qemu-kvm: virtio-serial-bus: Guest failure in
> adding device virtio-serial0.0
> 2017-08-14T07:53:22.710677Z qemu-kvm: virtio-serial-bus: Unexpected port id
> 1122983520 for device virtio-serial0.0
> 2017-08-14T07:53:32.781204Z qemu-kvm: virtio-serial-bus: Guest failure in
> adding device virtio-serial0.0
> 2017-08-14T07:53:48.040513Z qemu-kvm: virtio-serial-bus: Unexpected port id
> 3179968584 for device virtio-serial0.0
> 2017-08-14T07:54:23.547393Z qemu-kvm: virtio-serial-bus: Unexpected port id
> 1122983520 for device virtio-serial0.0
> 2017-08-14T07:55:54.350754Z qemu-kvm: virtio-serial-bus: Unexpected port id
> 1122983520 for device virtio-serial0.0
> 2017-08-14T07:56:09.393056Z qemu-kvm: virtio-serial-bus: Unexpected port id
> 1122983520 for device virtio-serial0.0
> 2017-08-14T07:57:39.670850Z qemu-kvm: virtio-serial-bus: Unexpected port id
> 1122983520 for device virtio-serial0.0
> 2017-08-14T07:58:09.867650Z qemu-kvm: virtio-serial-bus: Unexpected port id
> 1185792 for device virtio-serial0.0
> 2017-08-14T07:59:10.053208Z qemu-kvm: virtio-serial-bus: Unexpected port id
> 1122983520 for device virtio-serial0.0
> 2017-08-14T08:00:20.235162Z qemu-kvm: virtio-serial-bus: Guest failure in
> adding device virtio-serial0.0
> 2017-08-14T08:01:20.394196Z qemu-kvm: virtio-serial-bus: Guest failure in
> adding device virtio-serial0.0
> 
> So, the virtio-serial port will not be available, it cause my program
> doesn't start in guest(windows10).
> Can you give me some advices ?
> 
> Looking forward to your reply.
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