[    1.907987] ip (240) used greatest stack depth: 12376 bytes left
[    1.941004] ip (243) used greatest stack depth: 12328 bytes left
[   14.073023] ip (1173) used greatest stack depth: 12200 bytes left
[  656.354578] blackhole_netdev_xmit(): Dropping skb.
[  656.354640] blackhole_netdev_xmit(): Dropping skb.
[  656.354675] blackhole_netdev_xmit(): Dropping skb.
[  656.354712] blackhole_netdev_xmit(): Dropping skb.
[  682.725822] blackhole_netdev_xmit(): Dropping skb.
[  682.725887] blackhole_netdev_xmit(): Dropping skb.
[  682.725921] blackhole_netdev_xmit(): Dropping skb.
[  682.725955] blackhole_netdev_xmit(): Dropping skb.
[  713.489352] blackhole_netdev_xmit(): Dropping skb.
[  713.489402] blackhole_netdev_xmit(): Dropping skb.
[  713.489433] blackhole_netdev_xmit(): Dropping skb.
[  713.489459] blackhole_netdev_xmit(): Dropping skb.
[  722.844959] blackhole_netdev_xmit(): Dropping skb.
[  722.845014] blackhole_netdev_xmit(): Dropping skb.
[  722.845048] blackhole_netdev_xmit(): Dropping skb.
[  722.845083] blackhole_netdev_xmit(): Dropping skb.
[  745.631521] blackhole_netdev_xmit(): Dropping skb.
[  745.631571] blackhole_netdev_xmit(): Dropping skb.
[  745.631603] blackhole_netdev_xmit(): Dropping skb.
[  745.631634] blackhole_netdev_xmit(): Dropping skb.
[  747.306862] blackhole_netdev_xmit(): Dropping skb.
[  747.306922] blackhole_netdev_xmit(): Dropping skb.
[  747.306961] blackhole_netdev_xmit(): Dropping skb.
[  747.307001] blackhole_netdev_xmit(): Dropping skb.
[  764.075654] blackhole_netdev_xmit(): Dropping skb.
[  764.075714] blackhole_netdev_xmit(): Dropping skb.
[  764.075751] blackhole_netdev_xmit(): Dropping skb.
[  764.075789] blackhole_netdev_xmit(): Dropping skb.
[  784.186411] blackhole_netdev_xmit(): Dropping skb.
[  784.186460] blackhole_netdev_xmit(): Dropping skb.
[  784.186491] blackhole_netdev_xmit(): Dropping skb.
[  784.186530] blackhole_netdev_xmit(): Dropping skb.