[    2.730024] ip (274) used greatest stack depth: 12320 bytes left
[    7.123827] ip (619) used greatest stack depth: 12304 bytes left
[   23.673435] ip (2619) used greatest stack depth: 12144 bytes left
[  705.488879] blackhole_netdev_xmit(): Dropping skb.
[  705.488960] blackhole_netdev_xmit(): Dropping skb.
[  705.489001] blackhole_netdev_xmit(): Dropping skb.
[  705.489038] blackhole_netdev_xmit(): Dropping skb.
[ 1068.499350] blackhole_netdev_xmit(): Dropping skb.
[ 1068.499416] blackhole_netdev_xmit(): Dropping skb.
[ 1068.499445] blackhole_netdev_xmit(): Dropping skb.
[ 1068.499479] blackhole_netdev_xmit(): Dropping skb.
[ 1159.203965] blackhole_netdev_xmit(): Dropping skb.
[ 1159.204022] blackhole_netdev_xmit(): Dropping skb.
[ 1159.204057] blackhole_netdev_xmit(): Dropping skb.
[ 1159.204093] blackhole_netdev_xmit(): Dropping skb.
[ 1187.605127] blackhole_netdev_xmit(): Dropping skb.
[ 1187.605182] blackhole_netdev_xmit(): Dropping skb.
[ 1187.605212] blackhole_netdev_xmit(): Dropping skb.
[ 1187.605244] blackhole_netdev_xmit(): Dropping skb.
[ 1198.818853] blackhole_netdev_xmit(): Dropping skb.
[ 1198.818919] blackhole_netdev_xmit(): Dropping skb.
[ 1198.818956] blackhole_netdev_xmit(): Dropping skb.
[ 1198.819007] blackhole_netdev_xmit(): Dropping skb.
[ 1237.829776] blackhole_netdev_xmit(): Dropping skb.
[ 1237.829848] blackhole_netdev_xmit(): Dropping skb.
[ 1237.829895] blackhole_netdev_xmit(): Dropping skb.
[ 1237.829932] blackhole_netdev_xmit(): Dropping skb.