[    2.037017] ip (248) used greatest stack depth: 12376 bytes left
[    2.609192] ip (282) used greatest stack depth: 12360 bytes left
[    2.657142] ip (286) used greatest stack depth: 12344 bytes left
[   15.866205] mpls_gso: MPLS GSO support
[  749.839549] blackhole_netdev_xmit(): Dropping skb.
[  749.839606] blackhole_netdev_xmit(): Dropping skb.
[  749.839637] blackhole_netdev_xmit(): Dropping skb.
[  749.839668] blackhole_netdev_xmit(): Dropping skb.