[    2.425053] ip (246) used greatest stack depth: 12376 bytes left
[    3.103899] ip (280) used greatest stack depth: 12344 bytes left
[   16.914001] mpls_gso: MPLS GSO support
[  632.303005] ip (19297) used greatest stack depth: 12328 bytes left
[  900.015278] blackhole_netdev_xmit(): Dropping skb.
[  900.015346] blackhole_netdev_xmit(): Dropping skb.
[  900.015376] blackhole_netdev_xmit(): Dropping skb.
[  900.015408] blackhole_netdev_xmit(): Dropping skb.