[    1.889024] ip (244) used greatest stack depth: 12440 bytes left
[    1.928084] ip (247) used greatest stack depth: 12376 bytes left
[    2.546760] ip (279) used greatest stack depth: 12344 bytes left
[   15.242825] mpls_gso: MPLS GSO support
[  983.485289] blackhole_netdev_xmit(): Dropping skb.
[  983.485360] blackhole_netdev_xmit(): Dropping skb.
[  983.485393] blackhole_netdev_xmit(): Dropping skb.
[  983.485425] blackhole_netdev_xmit(): Dropping skb.