[    2.253829] ip (247) used greatest stack depth: 12440 bytes left
[    2.291590] ip (250) used greatest stack depth: 12376 bytes left
[    2.904046] ip (281) used greatest stack depth: 12344 bytes left
[   18.413896] mpls_gso: MPLS GSO support
[  830.324602] blackhole_netdev_xmit(): Dropping skb.
[  830.324668] blackhole_netdev_xmit(): Dropping skb.
[  830.324701] blackhole_netdev_xmit(): Dropping skb.
[  830.324733] blackhole_netdev_xmit(): Dropping skb.