[    1.716419] ip (259) used greatest stack depth: 12232 bytes left
[    2.196279] ip (293) used greatest stack depth: 12200 bytes left
[    4.986203] ip (436) used greatest stack depth: 12184 bytes left
[   12.336717] mpls_gso: MPLS GSO support
[  754.350996] blackhole_netdev_xmit(): Dropping skb.
[  754.351095] blackhole_netdev_xmit(): Dropping skb.
[  754.351142] blackhole_netdev_xmit(): Dropping skb.
[  754.351190] blackhole_netdev_xmit(): Dropping skb.