[    2.641041] ip (276) used greatest stack depth: 12352 bytes left
[  646.175416] ip (21099) used greatest stack depth: 12312 bytes left
[  830.221916] blackhole_netdev_xmit(): Dropping skb.
[  830.221979] blackhole_netdev_xmit(): Dropping skb.
[  830.222018] blackhole_netdev_xmit(): Dropping skb.
[  830.222054] blackhole_netdev_xmit(): Dropping skb.
[  886.087405] blackhole_netdev_xmit(): Dropping skb.
[  886.087463] blackhole_netdev_xmit(): Dropping skb.
[  886.087500] blackhole_netdev_xmit(): Dropping skb.
[  886.087536] blackhole_netdev_xmit(): Dropping skb.
[  943.789128] blackhole_netdev_xmit(): Dropping skb.
[  943.789198] blackhole_netdev_xmit(): Dropping skb.
[  943.789250] blackhole_netdev_xmit(): Dropping skb.
[  943.789302] blackhole_netdev_xmit(): Dropping skb.
[ 1012.191603] blackhole_netdev_xmit(): Dropping skb.
[ 1012.191669] blackhole_netdev_xmit(): Dropping skb.
[ 1012.191706] blackhole_netdev_xmit(): Dropping skb.
[ 1012.191736] blackhole_netdev_xmit(): Dropping skb.
[ 1087.675476] blackhole_netdev_xmit(): Dropping skb.
[ 1087.675559] blackhole_netdev_xmit(): Dropping skb.
[ 1087.675609] blackhole_netdev_xmit(): Dropping skb.
[ 1087.675658] blackhole_netdev_xmit(): Dropping skb.
[ 1239.411296] blackhole_netdev_xmit(): Dropping skb.
[ 1239.411370] blackhole_netdev_xmit(): Dropping skb.
[ 1239.411409] blackhole_netdev_xmit(): Dropping skb.
[ 1239.411451] blackhole_netdev_xmit(): Dropping skb.