[    1.977115] ip (293) used greatest stack depth: 12248 bytes left
[   11.537332] mpls_gso: MPLS GSO support
[   11.774999] ip (1429) used greatest stack depth: 12232 bytes left
[  658.349467] blackhole_netdev_xmit(): Dropping skb.
[  658.349530] blackhole_netdev_xmit(): Dropping skb.
[  658.349578] blackhole_netdev_xmit(): Dropping skb.
[  658.349620] blackhole_netdev_xmit(): Dropping skb.