[    2.160857] ip (275) used greatest stack depth: 12320 bytes left
[  634.291675] ip (8320) used greatest stack depth: 12048 bytes left
[  964.310495] blackhole_netdev_xmit(): Dropping skb.
[  964.310569] blackhole_netdev_xmit(): Dropping skb.
[  964.310609] blackhole_netdev_xmit(): Dropping skb.
[  964.310647] blackhole_netdev_xmit(): Dropping skb.
[ 1097.110398] blackhole_netdev_xmit(): Dropping skb.
[ 1097.110470] blackhole_netdev_xmit(): Dropping skb.
[ 1097.110506] blackhole_netdev_xmit(): Dropping skb.
[ 1097.110536] blackhole_netdev_xmit(): Dropping skb.
[ 1107.740786] blackhole_netdev_xmit(): Dropping skb.
[ 1107.740837] blackhole_netdev_xmit(): Dropping skb.
[ 1107.740869] blackhole_netdev_xmit(): Dropping skb.
[ 1107.740896] blackhole_netdev_xmit(): Dropping skb.