[    2.331153] ip (276) used greatest stack depth: 12352 bytes left
[   21.198732] ip (2136) used greatest stack depth: 12200 bytes left
[  934.505928] blackhole_netdev_xmit(): Dropping skb.
[  934.506002] blackhole_netdev_xmit(): Dropping skb.
[  934.506037] blackhole_netdev_xmit(): Dropping skb.
[  934.506074] blackhole_netdev_xmit(): Dropping skb.
[  979.243741] blackhole_netdev_xmit(): Dropping skb.
[  979.243799] blackhole_netdev_xmit(): Dropping skb.
[  979.243832] blackhole_netdev_xmit(): Dropping skb.
[  979.243865] blackhole_netdev_xmit(): Dropping skb.
[  984.603212] blackhole_netdev_xmit(): Dropping skb.
[  984.603284] blackhole_netdev_xmit(): Dropping skb.
[  984.603326] blackhole_netdev_xmit(): Dropping skb.
[  984.603361] blackhole_netdev_xmit(): Dropping skb.