xbd0: Back-end specified ring-pages of 16 limited to front-end limit of 15.
xbd0: Back-end specified ring-pages of 15 is not a power of 2. Limited to 8.
xbd0: Back-end specified max_requests of 512 limited to front-end limit of 256.
xn0: uhub0: <Intel UHCI root HUB, class 9/0, rev 1.00/1.00, addr 1> on usbus0
backend features: feature-sg feature-gso-tcp4
uhub0: 2 ports with 2 removable, self powered
ugen0.2: <QEMU> at usbus0
uhid0: <QEMU QEMU USB Tablet, class 0/0, rev 2.00/0.00, addr 2> on usbus0
uhub0: at usbus0, port 1, addr 1 (disconnected)
ugen0.2: <QEMU> at usbus0 (disconnected)
uhid0: at uhub0, port 1, addr 2 (disconnected)
qemu-system-i386: terminating on signal 1 from pid 8175 (xl)