[    2.101395] ip (275) used greatest stack depth: 12272 bytes left
[   17.424835] ip (2219) used greatest stack depth: 12176 bytes left
[  666.434941] blackhole_netdev_xmit(): Dropping skb.
[  666.435070] blackhole_netdev_xmit(): Dropping skb.
[  666.435119] blackhole_netdev_xmit(): Dropping skb.
[  666.435163] blackhole_netdev_xmit(): Dropping skb.
[ 1066.357604] blackhole_netdev_xmit(): Dropping skb.
[ 1066.357684] blackhole_netdev_xmit(): Dropping skb.
[ 1066.357731] blackhole_netdev_xmit(): Dropping skb.
[ 1066.357784] blackhole_netdev_xmit(): Dropping skb.
[ 1139.113162] blackhole_netdev_xmit(): Dropping skb.
[ 1139.113228] blackhole_netdev_xmit(): Dropping skb.
[ 1139.113268] blackhole_netdev_xmit(): Dropping skb.
[ 1139.113304] blackhole_netdev_xmit(): Dropping skb.