[    2.599689] ip (280) used greatest stack depth: 12360 bytes left
[    2.806556] ip (294) used greatest stack depth: 12344 bytes left
[   15.482736] mpls_gso: MPLS GSO support
[  640.439017] ip (20177) used greatest stack depth: 12328 bytes left
[  977.302378] blackhole_netdev_xmit(): Dropping skb.
[  977.302441] blackhole_netdev_xmit(): Dropping skb.
[  977.302475] blackhole_netdev_xmit(): Dropping skb.
[  977.302515] blackhole_netdev_xmit(): Dropping skb.