[    1.636268] ip (241) used greatest stack depth: 12544 bytes left
[    1.661663] ip (244) used greatest stack depth: 12352 bytes left
[    2.086393] ip (275) used greatest stack depth: 12320 bytes left
[  627.983411] ip (2581) used greatest stack depth: 12160 bytes left
[  795.827613] blackhole_netdev_xmit(): Dropping skb.
[  795.827666] blackhole_netdev_xmit(): Dropping skb.
[  795.827700] blackhole_netdev_xmit(): Dropping skb.
[  795.827740] blackhole_netdev_xmit(): Dropping skb.
[  821.181439] blackhole_netdev_xmit(): Dropping skb.
[  821.181494] blackhole_netdev_xmit(): Dropping skb.
[  821.181527] blackhole_netdev_xmit(): Dropping skb.
[  821.181560] blackhole_netdev_xmit(): Dropping skb.
[  852.387236] blackhole_netdev_xmit(): Dropping skb.
[  852.387287] blackhole_netdev_xmit(): Dropping skb.
[  852.387319] blackhole_netdev_xmit(): Dropping skb.
[  852.387359] blackhole_netdev_xmit(): Dropping skb.
[  933.831940] blackhole_netdev_xmit(): Dropping skb.
[  933.832002] blackhole_netdev_xmit(): Dropping skb.
[  933.832036] blackhole_netdev_xmit(): Dropping skb.
[  933.832070] blackhole_netdev_xmit(): Dropping skb.