Hi everyone,

I'm trying to test out the virtio driver's "tx=bh" option, or iothread in libvirt. When I create a machine, I get the "unsupported" error message:

# virsh create web101.xml
error: Failed to create domain from web101.xml
error: unsupported configuration: vhost-net is not supported with this QEMU binary

My interface XML looks like this:

<interface type='bridge'>
<mac address='52:54:00:6f:51:43'/>
<source bridge='vnet0'/>
<model type='virtio'/>
<driver name='vhost' txmode='iothread'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
</interface>

I've compiled libvirt (0.9.1) and QEMU (0.14.1) from source, but am still using my distro's kernel, 2.6.32-71.29.1.el6.x86_64. (Scientific Linux 6)

Thanks, and please let me know if you need any more info!

--Cal