[   12.515948] unregister_netdevice: waiting for lo to become free. Usage count = 0
[   22.756949] unregister_netdevice: waiting for lo to become free. Usage count = 0
[   32.995952] unregister_netdevice: waiting for lo to become free. Usage count = 0
[   43.235951] unregister_netdevice: waiting for lo to become free. Usage count = 0
[   53.476946] unregister_netdevice: waiting for lo to become free. Usage count = 0
[   63.715949] unregister_netdevice: waiting for lo to become free. Usage count = 0
[   73.955953] unregister_netdevice: waiting for lo to become free. Usage count = 0