https://bugzilla.redhat.com/show_bug.cgi?id=1484230 When updating a virtio enabled vNIC and trying to change either of rx_queue_size or tx_queue_size success is reported although no operation is actually performed. Moreover, there's no way how to change these on the fly. This is due to way we check for changes: explicitly for each struct member. Therefore it's easy to miss one. Signed-off-by: Michal Privoznik <mprivozn(a)redhat.com&gt; --- src/qemu/qemu_hotplug.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c index 4be0f546c..9611df517 100644 --- a/src/qemu/qemu_hotplug.c +++ b/src/qemu/qemu_hotplug.c @@ -3067,6 +3067,8 @@ qemuDomainChangeNet(virQEMUDriverPtr driver, olddev->driver.virtio.ioeventfd != newdev->driver.virtio.ioeventfd || olddev->driver.virtio.event_idx != newdev->driver.virtio.event_idx || olddev->driver.virtio.queues != newdev->driver.virtio.queues || + olddev->driver.virtio.rx_queue_size != newdev->driver.virtio.rx_queue_size || + olddev->driver.virtio.tx_queue_size != newdev->driver.virtio.tx_queue_size || olddev->driver.virtio.host.csum != newdev->driver.virtio.host.csum || olddev->driver.virtio.host.gso != newdev->driver.virtio.host.gso || olddev->driver.virtio.host.tso4 != newdev->driver.virtio.host.tso4 || -- 2.13.5