[    1.841871] ip (249) used greatest stack depth: 12376 bytes left
[    2.354837] ip (280) used greatest stack depth: 12360 bytes left
[    5.614865] ip (448) used greatest stack depth: 12344 bytes left
[   14.718232] mpls_gso: MPLS GSO support
[  897.454344] blackhole_netdev_xmit(): Dropping skb.
[  897.454405] blackhole_netdev_xmit(): Dropping skb.
[  897.454438] blackhole_netdev_xmit(): Dropping skb.
[  897.454471] blackhole_netdev_xmit(): Dropping skb.