[   12.509498] unregister_netdevice: waiting for lo to become free. Usage count = 0
[   22.749491] unregister_netdevice: waiting for lo to become free. Usage count = 0
[   32.990497] unregister_netdevice: waiting for lo to become free. Usage count = 0
[   43.230496] unregister_netdevice: waiting for lo to become free. Usage count = 0
[   53.469495] unregister_netdevice: waiting for lo to become free. Usage count = 0
[   63.709498] unregister_netdevice: waiting for lo to become free. Usage count = 0
[   73.949495] unregister_netdevice: waiting for lo to become free. Usage count = 0