[    1.648173] ip (260) used greatest stack depth: 12232 bytes left
[    2.049597] ip (294) used greatest stack depth: 12200 bytes left
[   11.671192] mpls_gso: MPLS GSO support
[  680.699346] blackhole_netdev_xmit(): Dropping skb.
[  680.699425] blackhole_netdev_xmit(): Dropping skb.
[  680.699477] blackhole_netdev_xmit(): Dropping skb.
[  680.699523] blackhole_netdev_xmit(): Dropping skb.