[    2.027604] ip (244) used greatest stack depth: 12336 bytes left
[  638.579097] ip (22141) used greatest stack depth: 12312 bytes left
[  685.383043] blackhole_netdev_xmit(): Dropping skb.
[  685.383108] blackhole_netdev_xmit(): Dropping skb.
[  685.383145] blackhole_netdev_xmit(): Dropping skb.
[  685.383181] blackhole_netdev_xmit(): Dropping skb.
[  825.270188] blackhole_netdev_xmit(): Dropping skb.
[  825.270245] blackhole_netdev_xmit(): Dropping skb.
[  825.270276] blackhole_netdev_xmit(): Dropping skb.
[  825.270307] blackhole_netdev_xmit(): Dropping skb.
[ 1004.404941] blackhole_netdev_xmit(): Dropping skb.
[ 1004.405026] blackhole_netdev_xmit(): Dropping skb.
[ 1004.405075] blackhole_netdev_xmit(): Dropping skb.
[ 1004.405123] blackhole_netdev_xmit(): Dropping skb.
[ 1012.688446] blackhole_netdev_xmit(): Dropping skb.
[ 1012.688499] blackhole_netdev_xmit(): Dropping skb.
[ 1012.688530] blackhole_netdev_xmit(): Dropping skb.
[ 1012.688563] blackhole_netdev_xmit(): Dropping skb.
[ 1189.494119] blackhole_netdev_xmit(): Dropping skb.
[ 1189.494187] blackhole_netdev_xmit(): Dropping skb.
[ 1189.494225] blackhole_netdev_xmit(): Dropping skb.
[ 1189.494264] blackhole_netdev_xmit(): Dropping skb.
[ 1222.802863] blackhole_netdev_xmit(): Dropping skb.
[ 1222.802921] blackhole_netdev_xmit(): Dropping skb.
[ 1222.802952] blackhole_netdev_xmit(): Dropping skb.
[ 1222.802985] blackhole_netdev_xmit(): Dropping skb.