[    1.753987] ip (258) used greatest stack depth: 12832 bytes left
[    1.806328] ip (264) used greatest stack depth: 12280 bytes left
[    2.181768] ip (292) used greatest stack depth: 12248 bytes left
[   12.459688] mpls_gso: MPLS GSO support
[  916.307443] blackhole_netdev_xmit(): Dropping skb.
[  916.307501] blackhole_netdev_xmit(): Dropping skb.
[  916.307542] blackhole_netdev_xmit(): Dropping skb.
[  916.307581] blackhole_netdev_xmit(): Dropping skb.