[    2.576314] ip (277) used greatest stack depth: 12352 bytes left
[    8.863098] ip (755) used greatest stack depth: 12336 bytes left
[  648.773934] ip (25781) used greatest stack depth: 12200 bytes left
[  668.787323] blackhole_netdev_xmit(): Dropping skb.
[  668.787387] blackhole_netdev_xmit(): Dropping skb.
[  668.787420] blackhole_netdev_xmit(): Dropping skb.
[  668.787447] blackhole_netdev_xmit(): Dropping skb.
[  723.366799] blackhole_netdev_xmit(): Dropping skb.
[  723.366857] blackhole_netdev_xmit(): Dropping skb.
[  723.366888] blackhole_netdev_xmit(): Dropping skb.
[  723.366915] blackhole_netdev_xmit(): Dropping skb.
[ 1178.124167] blackhole_netdev_xmit(): Dropping skb.
[ 1178.124259] blackhole_netdev_xmit(): Dropping skb.
[ 1178.124306] blackhole_netdev_xmit(): Dropping skb.
[ 1178.124346] blackhole_netdev_xmit(): Dropping skb.
[ 1198.196873] blackhole_netdev_xmit(): Dropping skb.
[ 1198.196930] blackhole_netdev_xmit(): Dropping skb.
[ 1198.196963] blackhole_netdev_xmit(): Dropping skb.
[ 1198.196997] blackhole_netdev_xmit(): Dropping skb.
[ 1226.049822] blackhole_netdev_xmit(): Dropping skb.
[ 1226.049868] blackhole_netdev_xmit(): Dropping skb.
[ 1226.049902] blackhole_netdev_xmit(): Dropping skb.
[ 1226.049932] blackhole_netdev_xmit(): Dropping skb.