[    1.693486] ip (259) used greatest stack depth: 12248 bytes left
[    2.115354] ip (293) used greatest stack depth: 12216 bytes left
[   12.183367] mpls_gso: MPLS GSO support
[  957.841399] blackhole_netdev_xmit(): Dropping skb.
[  957.841491] blackhole_netdev_xmit(): Dropping skb.
[  957.841546] blackhole_netdev_xmit(): Dropping skb.
[  957.841594] blackhole_netdev_xmit(): Dropping skb.