[    2.574632] ip (281) used greatest stack depth: 12360 bytes left
[    2.768064] ip (295) used greatest stack depth: 12344 bytes left
[    9.745426] ip (786) used greatest stack depth: 12064 bytes left
[   15.800696] mpls_gso: MPLS GSO support
[  881.022663] blackhole_netdev_xmit(): Dropping skb.
[  881.022749] blackhole_netdev_xmit(): Dropping skb.
[  881.022790] blackhole_netdev_xmit(): Dropping skb.
[  881.022859] blackhole_netdev_xmit(): Dropping skb.