[    1.706908] ip (266) used greatest stack depth: 12280 bytes left
[    2.107483] ip (294) used greatest stack depth: 12248 bytes left
[   12.891957] mpls_gso: MPLS GSO support
[  820.567067] blackhole_netdev_xmit(): Dropping skb.
[  820.567172] blackhole_netdev_xmit(): Dropping skb.
[  820.567236] blackhole_netdev_xmit(): Dropping skb.
[  820.567301] blackhole_netdev_xmit(): Dropping skb.