[    2.664460] ip (282) used greatest stack depth: 12272 bytes left
[    9.048397] ip (680) used greatest stack depth: 12112 bytes left
[   17.256928] mpls_gso: MPLS GSO support
[  755.547367] blackhole_netdev_xmit(): Dropping skb.
[  755.547433] blackhole_netdev_xmit(): Dropping skb.
[  755.547466] blackhole_netdev_xmit(): Dropping skb.
[  755.547496] blackhole_netdev_xmit(): Dropping skb.