[    1.892031] ip (238) used greatest stack depth: 12376 bytes left
[    2.446510] ip (272) used greatest stack depth: 12344 bytes left
[    2.491502] ip (276) used greatest stack depth: 12072 bytes left
[  701.853618] blackhole_netdev_xmit(): Dropping skb.
[  701.853704] blackhole_netdev_xmit(): Dropping skb.
[  701.853753] blackhole_netdev_xmit(): Dropping skb.
[  701.853803] blackhole_netdev_xmit(): Dropping skb.
[  964.430289] blackhole_netdev_xmit(): Dropping skb.
[  964.430347] blackhole_netdev_xmit(): Dropping skb.
[  964.430384] blackhole_netdev_xmit(): Dropping skb.
[  964.430420] blackhole_netdev_xmit(): Dropping skb.
[ 1007.684335] blackhole_netdev_xmit(): Dropping skb.
[ 1007.684415] blackhole_netdev_xmit(): Dropping skb.
[ 1007.684459] blackhole_netdev_xmit(): Dropping skb.
[ 1007.684498] blackhole_netdev_xmit(): Dropping skb.
[ 1109.215221] blackhole_netdev_xmit(): Dropping skb.
[ 1109.215287] blackhole_netdev_xmit(): Dropping skb.
[ 1109.215324] blackhole_netdev_xmit(): Dropping skb.
[ 1109.215361] blackhole_netdev_xmit(): Dropping skb.
[ 1143.481059] blackhole_netdev_xmit(): Dropping skb.
[ 1143.481112] blackhole_netdev_xmit(): Dropping skb.
[ 1143.481142] blackhole_netdev_xmit(): Dropping skb.
[ 1143.481168] blackhole_netdev_xmit(): Dropping skb.