[    1.921528] ip (251) used greatest stack depth: 12376 bytes left
[    2.508429] ip (282) used greatest stack depth: 12344 bytes left
[   15.608641] mpls_gso: MPLS GSO support
[  941.038468] blackhole_netdev_xmit(): Dropping skb.
[  941.038527] blackhole_netdev_xmit(): Dropping skb.
[  941.038558] blackhole_netdev_xmit(): Dropping skb.
[  941.038592] blackhole_netdev_xmit(): Dropping skb.