[    1.870783] ip (245) used greatest stack depth: 12568 bytes left
[    2.444275] ip (279) used greatest stack depth: 12360 bytes left
[    2.641808] ip (294) used greatest stack depth: 12344 bytes left
[   14.246134] ip (1210) used greatest stack depth: 12192 bytes left
[   15.616548] mpls_gso: MPLS GSO support
[  688.031249] blackhole_netdev_xmit(): Dropping skb.
[  688.031307] blackhole_netdev_xmit(): Dropping skb.
[  688.031337] blackhole_netdev_xmit(): Dropping skb.
[  688.031369] blackhole_netdev_xmit(): Dropping skb.