On Mon, Aug 07, 2017 at 03:07:48PM +0200, Paolo Bonzini wrote: > can_queue should depend on the virtqueue size, which unfortunately can > vary for each virtio-scsi device in theory. The virtqueue size is > retrieved by drivers/virtio prior to calling vring_create_virtqueue, and > in QEMU it is the second argument to virtio_add_queue. Why is that unfortunate? We don't even have to set can_queue in the host template, we can dynamically set it on per-host basis.