[    1.979198] ip (247) used greatest stack depth: 12376 bytes left
[    2.603905] ip (281) used greatest stack depth: 12344 bytes left
[   16.754524] mpls_gso: MPLS GSO support
[  640.338179] ip (27414) used greatest stack depth: 12064 bytes left
[  970.157864] blackhole_netdev_xmit(): Dropping skb.
[  970.157932] blackhole_netdev_xmit(): Dropping skb.
[  970.157966] blackhole_netdev_xmit(): Dropping skb.
[  970.157997] blackhole_netdev_xmit(): Dropping skb.