Hi all, Recent change in tripleo [1] configure nova rx_queue_size tx_queue_size config by default. It seem that this config option breaks booting vm with SR-IOV. See [2] The issues is because of this code [3] which configure virtio queue size if the in the interface xml the driver is vhost or None. In case of SR-IOV the driver is also None and that why we get the error. A quick fix will be adding driver=vfio to [4] I just wonder if there are other interface in the libvirt xml which this can have the same issue. [1] - https://github.com/openstack/tripleo-heat-templates/commit/444fc042dca3f9a85e8f7076ce68114ac45478c7#diff-99a22d37b829681d157f41d35c38e4c5 [2] - http://paste.openstack.org/show/728666/ [3] - https://review.openstack.org/#/c/595592/ [4] - https://github.com/openstack/nova/blob/34956bea4beb8e5ba474b42ba777eb88a5eadd76/nova/virt/libvirt/designer.py#L123 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.openstack.org/pipermail/openstack-dev/attachments/20180823/614eaf10/attachment.html>