[    1.843265] ip (241) used greatest stack depth: 12352 bytes left
[    2.443724] ip (275) used greatest stack depth: 12320 bytes left
[  839.112116] blackhole_netdev_xmit(): Dropping skb.
[  839.112181] blackhole_netdev_xmit(): Dropping skb.
[  839.112219] blackhole_netdev_xmit(): Dropping skb.
[  839.112256] blackhole_netdev_xmit(): Dropping skb.
[  960.736300] blackhole_netdev_xmit(): Dropping skb.
[  960.736365] blackhole_netdev_xmit(): Dropping skb.
[  960.736400] blackhole_netdev_xmit(): Dropping skb.
[  960.736435] blackhole_netdev_xmit(): Dropping skb.
[ 1245.806960] blackhole_netdev_xmit(): Dropping skb.
[ 1245.807013] blackhole_netdev_xmit(): Dropping skb.
[ 1245.807046] blackhole_netdev_xmit(): Dropping skb.
[ 1245.807082] blackhole_netdev_xmit(): Dropping skb.