[    1.620495] ip (260) used greatest stack depth: 12232 bytes left
[   11.455343] mpls_gso: MPLS GSO support
[  839.235061] blackhole_netdev_xmit(): Dropping skb.
[  839.235114] blackhole_netdev_xmit(): Dropping skb.
[  839.235150] blackhole_netdev_xmit(): Dropping skb.
[  839.235190] blackhole_netdev_xmit(): Dropping skb.