[    2.029295] ip (248) used greatest stack depth: 12832 bytes left
[    2.719544] ip (282) used greatest stack depth: 12344 bytes left
[   15.972004] mpls_gso: MPLS GSO support
[   17.305119] ip (1458) used greatest stack depth: 12288 bytes left
[  638.318831] ip (27926) used greatest stack depth: 12192 bytes left
[  945.877126] blackhole_netdev_xmit(): Dropping skb.
[  945.877188] blackhole_netdev_xmit(): Dropping skb.
[  945.877222] blackhole_netdev_xmit(): Dropping skb.
[  945.877249] blackhole_netdev_xmit(): Dropping skb.