[    1.827483] ip (245) used greatest stack depth: 12352 bytes left
[    1.864832] ip (248) used greatest stack depth: 12304 bytes left
[  880.208527] blackhole_netdev_xmit(): Dropping skb.
[  880.208605] blackhole_netdev_xmit(): Dropping skb.
[  880.208645] blackhole_netdev_xmit(): Dropping skb.
[  880.208682] blackhole_netdev_xmit(): Dropping skb.
[  902.834250] blackhole_netdev_xmit(): Dropping skb.
[  902.834309] blackhole_netdev_xmit(): Dropping skb.
[  902.834339] blackhole_netdev_xmit(): Dropping skb.
[  902.834377] blackhole_netdev_xmit(): Dropping skb.
[  929.910515] blackhole_netdev_xmit(): Dropping skb.
[  929.910583] blackhole_netdev_xmit(): Dropping skb.
[  929.910617] blackhole_netdev_xmit(): Dropping skb.
[  929.910659] blackhole_netdev_xmit(): Dropping skb.
[  953.677848] ip (28828) used greatest stack depth: 12272 bytes left