Re: [libvirt] question for <interface> in ethernet type and multiple queues in KVM (start VM failed)

Hi, I use ethernet vif for VM (libvirt 1.1.0 qemu 1.5.1). xml as such <interface type='ethernet'> <script path='' /> <target dev='tap_mq'/> <mac address='52:54:00:19:9e:4e'/> <model type='virtio' /> <driver name='vhost' queues='2'/> </interface> tap_mq is a tap device with multi_queue property which was created on host by ip command, such as follows #ip tuntap add tap_mq mode tap multi_queue I want to use multiple queue feature for this vif so I set queues='2' in xml. When start VM , an error occurs "error: unsupported configuration: Multiqueue network is not supported for: ethernet". This error is reported from function qemuBuildInterfaceCommandLine /* Currently nothing besides TAP devices supports multiqueue. */ if (net->driver.virtio.queues > 0 && !(actualType == VIR_DOMAIN_NET_TYPE_NETWORK || actualType == VIR_DOMAIN_NET_TYPE_BRIDGE)) { virReportError(VIR_ERR_CONFIG_UNSUPPORTED, _("Multiqueue network is not supported for: %s"), virDomainNetTypeToString(actualType)); return -1; } The comment specifies that only TAP device supports multiqueue. But VIR_DOMAIN_NET_TYPE_ETHERNET is also TAP device I think.