[    2.326983] ip (275) used greatest stack depth: 12320 bytes left
[   20.945104] ip (2148) used greatest stack depth: 12176 bytes left
[  654.410791] blackhole_netdev_xmit(): Dropping skb.
[  654.410871] blackhole_netdev_xmit(): Dropping skb.
[  654.410912] blackhole_netdev_xmit(): Dropping skb.
[  654.410954] blackhole_netdev_xmit(): Dropping skb.
[  835.541096] blackhole_netdev_xmit(): Dropping skb.
[  835.541152] blackhole_netdev_xmit(): Dropping skb.
[  835.541182] blackhole_netdev_xmit(): Dropping skb.
[  835.541224] blackhole_netdev_xmit(): Dropping skb.
[  971.055448] blackhole_netdev_xmit(): Dropping skb.
[  971.055538] blackhole_netdev_xmit(): Dropping skb.
[  971.055585] blackhole_netdev_xmit(): Dropping skb.
[  971.055628] blackhole_netdev_xmit(): Dropping skb.
[ 1102.499962] blackhole_netdev_xmit(): Dropping skb.
[ 1102.500020] blackhole_netdev_xmit(): Dropping skb.
[ 1102.500053] blackhole_netdev_xmit(): Dropping skb.
[ 1102.500089] blackhole_netdev_xmit(): Dropping skb.