[    2.554014] ip (280) used greatest stack depth: 12360 bytes left
[    5.280573] ip (447) used greatest stack depth: 12344 bytes left
[   11.615546] ip (1048) used greatest stack depth: 12328 bytes left
[   15.416718] mpls_gso: MPLS GSO support
[   20.983247] ip (2141) used greatest stack depth: 12240 bytes left
[  972.437590] blackhole_netdev_xmit(): Dropping skb.
[  972.437678] blackhole_netdev_xmit(): Dropping skb.
[  972.437746] blackhole_netdev_xmit(): Dropping skb.
[  972.437813] blackhole_netdev_xmit(): Dropping skb.