[    2.403574] ip (249) used greatest stack depth: 12376 bytes left
[    3.244712] ip (281) used greatest stack depth: 12344 bytes left
[   19.883509] mpls_gso: MPLS GSO support
[  836.809499] blackhole_netdev_xmit(): Dropping skb.
[  836.809570] blackhole_netdev_xmit(): Dropping skb.
[  836.809606] blackhole_netdev_xmit(): Dropping skb.
[  836.809641] blackhole_netdev_xmit(): Dropping skb.