Re: vhost-net requested but could not be initialized

[Asadullah Hussain <asadxflow@xxxxxxxxx>]

Currently in the VM XML, I am passing the following command line argument as a passthrough argument:

-netdev type=tap,id=net1,script=no,downscript=no,ifname=port3,vhost=on 

-device virtio-net-pci,netdev=net1,mac=00:00:00:00:00:01,csum=off,gso=off,guest_tso4=off,guest_tso6=off,guest_ecn=off

Is there another way to represent this in the XML file? maybe that may solve the problem.

On 24 July 2014 15:55, Asadullah Hussain <asadxflow@xxxxxxxxx> wrote:

On 24 July 2014 15:52, Daniel P. Berrange <berrange@xxxxxxxxxx> wrote:

On Thu, Jul 24, 2014 at 03:48:06PM +0500, Asadullah Hussain wrote:
> Let me clarify my question, I am using unmodified stock qemu (1.4.0) and
> only the location of vhost file descriptor is different from default (I
> don't remove the default /dev/vhost-net directory)
>
> The VHOST file descriptor is present in "/dev/vhost-0" directory instead of
> the default "/dev/vhost-net". When I try to give vhostfd in the XML I get a
> different error:

Well I suggest you make your system use the expected device
name for /dev/vhost-net. Just as libvirt only targets mainline
QEMU, we only target mainline kernel / standard device layout

​I was able to change my device name to /dev/vhost-net but still I get the error, the error itself isn't telling much about the problem:

2014-07-24 10:41:35.970+0000: 3183: error : qemuMonitorOpenUnix:293 : failed to connect to monitor socket: No such process

2014-07-24 10:41:35.970+0000: 3183: error : qemuProcessWaitForMonitor:1806 : internal error process exited while connecting to monitor: qemu-system-x86_64: -netdev type=tap,id=net1,script=no,downscript=no,ifname=port4,vhost=on: vhost-net requested but could not be initialized

qemu-system-x86_64: -netdev type=tap,id=net1,script=no,downscript=no,ifname=port4,vhost=on: Device 'tap' could not be initialized​

Regards,
Daniel
--
|: http://berrange.com      -o-    http://www.flickr.com/photos/dberrange/ :|
|: http://libvirt.org              -o-             http://virt-manager.org :|
|: http://autobuild.org       -o-         http://search.cpan.org/~danberr/ :|
|: http://entangle-photo.org       -o-       http://live.gnome.org/gtk-vnc :|

--

Cheers, 

Asadullah Hussain

--

Cheers, 

Asadullah Hussain

_______________________________________________
libvirt-users mailing list
libvirt-users@xxxxxxxxxx
https://www.redhat.com/mailman/listinfo/libvirt-users