[    2.029919] ip (251) used greatest stack depth: 12376 bytes left
[    2.599738] ip (282) used greatest stack depth: 12344 bytes left
[    5.853674] ip (451) used greatest stack depth: 12064 bytes left
[   15.283442] mpls_gso: MPLS GSO support
[  749.043056] blackhole_netdev_xmit(): Dropping skb.
[  749.043153] blackhole_netdev_xmit(): Dropping skb.
[  749.043207] blackhole_netdev_xmit(): Dropping skb.
[  749.043254] blackhole_netdev_xmit(): Dropping skb.
[  935.301189] blackhole_netdev_xmit(): Dropping skb.
[  935.301265] blackhole_netdev_xmit(): Dropping skb.
[  935.301300] blackhole_netdev_xmit(): Dropping skb.
[  935.301333] blackhole_netdev_xmit(): Dropping skb.