[    1.897211] ip (251) used greatest stack depth: 12376 bytes left
[    2.440714] ip (282) used greatest stack depth: 12344 bytes left
[    8.126540] ip (669) used greatest stack depth: 12288 bytes left
[   15.680358] mpls_gso: MPLS GSO support
[  761.201433] blackhole_netdev_xmit(): Dropping skb.
[  761.201490] blackhole_netdev_xmit(): Dropping skb.
[  761.201530] blackhole_netdev_xmit(): Dropping skb.
[  761.201563] blackhole_netdev_xmit(): Dropping skb.