[    1.797371] ip (249) used greatest stack depth: 12304 bytes left
[    6.698315] ip (649) used greatest stack depth: 12144 bytes left
[ 1094.028683] blackhole_netdev_xmit(): Dropping skb.
[ 1094.028748] blackhole_netdev_xmit(): Dropping skb.
[ 1094.028783] blackhole_netdev_xmit(): Dropping skb.
[ 1094.028820] blackhole_netdev_xmit(): Dropping skb.
[ 1103.245722] blackhole_netdev_xmit(): Dropping skb.
[ 1103.245774] blackhole_netdev_xmit(): Dropping skb.
[ 1103.245805] blackhole_netdev_xmit(): Dropping skb.
[ 1103.245844] blackhole_netdev_xmit(): Dropping skb.