[    1.956314] ip (247) used greatest stack depth: 12376 bytes left
[    2.549779] ip (281) used greatest stack depth: 12344 bytes left
[    2.597812] ip (285) used greatest stack depth: 12160 bytes left
[   15.760013] mpls_gso: MPLS GSO support
[  943.046414] blackhole_netdev_xmit(): Dropping skb.
[  943.046471] blackhole_netdev_xmit(): Dropping skb.
[  943.046510] blackhole_netdev_xmit(): Dropping skb.
[  943.046548] blackhole_netdev_xmit(): Dropping skb.