[    3.013286] ip (291) used greatest stack depth: 12384 bytes left
[   10.692146] ip (836) used greatest stack depth: 12320 bytes left
[   16.362829] mpls_gso: MPLS GSO support
[  812.514942] blackhole_netdev_xmit(): Dropping skb.
[  812.515054] blackhole_netdev_xmit(): Dropping skb.
[  812.515111] blackhole_netdev_xmit(): Dropping skb.
[  812.515152] blackhole_netdev_xmit(): Dropping skb.
[  958.110401] ip (19511) used greatest stack depth: 12256 bytes left
[ 1134.917086] blackhole_netdev_xmit(): Dropping skb.
[ 1134.917171] blackhole_netdev_xmit(): Dropping skb.
[ 1134.917207] blackhole_netdev_xmit(): Dropping skb.
[ 1134.917252] blackhole_netdev_xmit(): Dropping skb.