[    2.188080] ip (293) used greatest stack depth: 12248 bytes left
[   12.282040] mpls_gso: MPLS GSO support
[  636.989294] ip (31971) used greatest stack depth: 12040 bytes left
[  985.567499] blackhole_netdev_xmit(): Dropping skb.
[  985.567612] blackhole_netdev_xmit(): Dropping skb.
[  985.567668] blackhole_netdev_xmit(): Dropping skb.
[  985.567729] blackhole_netdev_xmit(): Dropping skb.