libxl: debug: libxl_aoutils.c:593:libxl__async_exec_start: forking to execute: /usr/local/etc/xen/scripts/vif-bridge /local/domain/0/backend/vif/15/0 
libxl: debug: libxl_event.c:689:libxl__ev_xswatch_deregister: watch w=0x800988dd0: deregister unregistered
libxl: debug: libxl_device.c:1203:device_hotplug: Domain 15:No hotplug script to execute
libxl: debug: libxl_event.c:689:libxl__ev_xswatch_deregister: watch w=0x800988dd0: deregister unregistered
libxl: debug: libxl_event.c:2200:libxl__ao_progress_report: ao 0x8009390a0: progress report: callback queued aop=0x800999970
libxl: debug: libxl_event.c:1873:libxl__ao_complete: ao 0x8009390a0: complete, rc=0
libxl: debug: libxl_event.c:1408:egc_run_callbacks: ao 0x8009390a0: progress report: callback aop=0x800999970
libxl: debug: libxl_event.c:1842:libxl__ao__destroy: ao 0x8009390a0: destroy
libxl: debug: libxl_qmp.c:813:libxl__qmp_initialize: Domain 15:connected to /var/run/xen/qmp-libxl-15
                                                                                                     libxl: debug: libxl_qmp.c:350:qmp_handle_response: Domain 15:message type: qmp
                                                                                                                                                                                   libxl: debug: libxl_qmp.c:365:qmp_handle_response: Domain 15:QEMU version: 3.0.0
                                                 libxl: debug: libxl_qmp.c:666:qmp_send_prepare: Domain 15:next qmp command: '{"execute":"qmp_capabilities","id":1}
'
 libxl: debug: libxl_qmp.c:350:qmp_handle_response: Domain 15:message type: return
                                                                                  libxl: debug: libxl_qmp.c:666:qmp_send_prepare: Domain 15:next qmp command: '{"execute":"cont","id":2}
'
 libxl: debug: libxl_qmp.c:350:qmp_handle_response: Domain 15:message type: return
                                                                                  xencall:buffer: debug: total allocations:674 total releases:674
xencall:buffer: debug: current allocations:0 maximum allocations:3
xencall:buffer: debug: cache current size:3
xencall:buffer: debug: cache hits:658 misses:3 toobig:13
xencall:buffer: debug: total allocations:0 total releases:0
xencall:buffer: debug: current allocations:0 maximum allocations:0
xencall:buffer: debug: cache current size:0
xencall:buffer: debug: cache hits:0 misses:0 toobig:0
[New Thread 800904a00 (LWP 101338/xl)]

Program exited normally.
(gdb)