[    2.477920] ip (275) used greatest stack depth: 12320 bytes left
[   10.367142] ip (950) used greatest stack depth: 12272 bytes left
[ 1029.608776] blackhole_netdev_xmit(): Dropping skb.
[ 1029.608894] blackhole_netdev_xmit(): Dropping skb.
[ 1029.608926] blackhole_netdev_xmit(): Dropping skb.
[ 1029.608960] blackhole_netdev_xmit(): Dropping skb.
[ 1055.350283] blackhole_netdev_xmit(): Dropping skb.
[ 1055.350351] blackhole_netdev_xmit(): Dropping skb.
[ 1055.350398] blackhole_netdev_xmit(): Dropping skb.
[ 1055.350435] blackhole_netdev_xmit(): Dropping skb.
[ 1123.915444] blackhole_netdev_xmit(): Dropping skb.
[ 1123.915493] blackhole_netdev_xmit(): Dropping skb.
[ 1123.915522] blackhole_netdev_xmit(): Dropping skb.
[ 1123.915547] blackhole_netdev_xmit(): Dropping skb.