[    2.119610] ip (252) used greatest stack depth: 12368 bytes left
[   16.204324] mpls_gso: MPLS GSO support
[  637.171295] ip (20625) used greatest stack depth: 12360 bytes left
[  652.830415] ip (22126) used greatest stack depth: 12256 bytes left
[  956.612977] blackhole_netdev_xmit(): Dropping skb.
[  956.613049] blackhole_netdev_xmit(): Dropping skb.
[  956.613098] blackhole_netdev_xmit(): Dropping skb.
[  956.613142] blackhole_netdev_xmit(): Dropping skb.