[    2.977009] ip (248) used greatest stack depth: 12376 bytes left
[    3.734281] ip (282) used greatest stack depth: 12344 bytes left
[   17.473496] mpls_gso: MPLS GSO support
[   30.776353] ip (2580) used greatest stack depth: 12128 bytes left
[  666.820767] blackhole_netdev_xmit(): Dropping skb.
[  666.820828] blackhole_netdev_xmit(): Dropping skb.
[  666.820858] blackhole_netdev_xmit(): Dropping skb.
[  666.820891] blackhole_netdev_xmit(): Dropping skb.