[    2.020783] ip (248) used greatest stack depth: 12376 bytes left
[    2.573394] ip (282) used greatest stack depth: 12360 bytes left
[    2.625932] ip (286) used greatest stack depth: 12344 bytes left
[    5.916696] ip (451) used greatest stack depth: 12288 bytes left
[   15.202340] mpls_gso: MPLS GSO support
[  900.668214] blackhole_netdev_xmit(): Dropping skb.
[  900.668291] blackhole_netdev_xmit(): Dropping skb.
[  900.668350] blackhole_netdev_xmit(): Dropping skb.
[  900.668407] blackhole_netdev_xmit(): Dropping skb.