[    1.823229] ip (240) used greatest stack depth: 12376 bytes left
[    1.888631] ip (246) used greatest stack depth: 12328 bytes left
[    2.590785] ip (288) used greatest stack depth: 12184 bytes left
[  874.918597] blackhole_netdev_xmit(): Dropping skb.
[  874.918678] blackhole_netdev_xmit(): Dropping skb.
[  874.918714] blackhole_netdev_xmit(): Dropping skb.
[  874.918746] blackhole_netdev_xmit(): Dropping skb.
[  947.377115] blackhole_netdev_xmit(): Dropping skb.
[  947.377197] blackhole_netdev_xmit(): Dropping skb.
[  947.377253] blackhole_netdev_xmit(): Dropping skb.
[  947.377303] blackhole_netdev_xmit(): Dropping skb.
[ 1187.808336] blackhole_netdev_xmit(): Dropping skb.
[ 1187.808402] blackhole_netdev_xmit(): Dropping skb.
[ 1187.808439] blackhole_netdev_xmit(): Dropping skb.
[ 1187.808472] blackhole_netdev_xmit(): Dropping skb.