[    2.109026] ip (250) used greatest stack depth: 12384 bytes left
[    2.728369] ip (278) used greatest stack depth: 12368 bytes left
[    2.789471] ip (282) used greatest stack depth: 12352 bytes left
[    7.864698] ip (621) used greatest stack depth: 12336 bytes left
[   23.329135] ip (2141) used greatest stack depth: 12312 bytes left
[  922.270704] blackhole_netdev_xmit(): Dropping skb.
[  922.270903] blackhole_netdev_xmit(): Dropping skb.
[  922.270964] blackhole_netdev_xmit(): Dropping skb.
[  922.271024] blackhole_netdev_xmit(): Dropping skb.
[  971.004573] blackhole_netdev_xmit(): Dropping skb.
[  971.004629] blackhole_netdev_xmit(): Dropping skb.
[  971.004670] blackhole_netdev_xmit(): Dropping skb.
[  971.004715] blackhole_netdev_xmit(): Dropping skb.
[ 1193.192765] blackhole_netdev_xmit(): Dropping skb.
[ 1193.192836] blackhole_netdev_xmit(): Dropping skb.
[ 1193.192872] blackhole_netdev_xmit(): Dropping skb.
[ 1193.192917] blackhole_netdev_xmit(): Dropping skb.