[    2.860686] ip (293) used greatest stack depth: 12384 bytes left
[   17.939718] mpls_gso: MPLS GSO support
[  648.803050] ip (21877) used greatest stack depth: 12360 bytes left
[  718.688473] blackhole_netdev_xmit(): Dropping skb.
[  718.688533] blackhole_netdev_xmit(): Dropping skb.
[  718.688570] blackhole_netdev_xmit(): Dropping skb.
[  718.688602] blackhole_netdev_xmit(): Dropping skb.