Re: [libvirt-users] vhost-net requested but could not be initialized

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(a)gmail.com&gt; wrote: > > > > On 24 July 2014 15:52, Daniel P. Berrange <berrange(a)redhat.com&gt; 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