[    1.902173] ip (247) used greatest stack depth: 12384 bytes left
[    2.437952] ip (278) used greatest stack depth: 12368 bytes left
[    2.484278] ip (282) used greatest stack depth: 12352 bytes left
[   13.296422] ip (1177) used greatest stack depth: 12072 bytes left
[  795.966532] blackhole_netdev_xmit(): Dropping skb.
[  795.966604] blackhole_netdev_xmit(): Dropping skb.
[  795.966649] blackhole_netdev_xmit(): Dropping skb.
[  795.966687] blackhole_netdev_xmit(): Dropping skb.
[  888.186280] blackhole_netdev_xmit(): Dropping skb.
[  888.186341] blackhole_netdev_xmit(): Dropping skb.
[  888.186377] blackhole_netdev_xmit(): Dropping skb.
[  888.186413] blackhole_netdev_xmit(): Dropping skb.
[ 1006.806897] blackhole_netdev_xmit(): Dropping skb.
[ 1006.806963] blackhole_netdev_xmit(): Dropping skb.
[ 1006.806999] blackhole_netdev_xmit(): Dropping skb.
[ 1006.807040] blackhole_netdev_xmit(): Dropping skb.