[    1.963382] ip (240) used greatest stack depth: 12352 bytes left
[    2.551358] ip (274) used greatest stack depth: 12320 bytes left
[   12.142800] ip (1042) used greatest stack depth: 12304 bytes left
[  779.096383] blackhole_netdev_xmit(): Dropping skb.
[  779.096464] blackhole_netdev_xmit(): Dropping skb.
[  779.096502] blackhole_netdev_xmit(): Dropping skb.
[  779.096543] blackhole_netdev_xmit(): Dropping skb.
[  872.083738] blackhole_netdev_xmit(): Dropping skb.
[  872.083966] blackhole_netdev_xmit(): Dropping skb.
[  872.084005] blackhole_netdev_xmit(): Dropping skb.
[  872.084047] blackhole_netdev_xmit(): Dropping skb.
[  884.262833] blackhole_netdev_xmit(): Dropping skb.
[  884.262893] blackhole_netdev_xmit(): Dropping skb.
[  884.262942] blackhole_netdev_xmit(): Dropping skb.
[  884.262981] blackhole_netdev_xmit(): Dropping skb.
[  895.903457] blackhole_netdev_xmit(): Dropping skb.
[  895.903526] blackhole_netdev_xmit(): Dropping skb.
[  895.903561] blackhole_netdev_xmit(): Dropping skb.
[  895.903610] blackhole_netdev_xmit(): Dropping skb.
[ 1084.620026] blackhole_netdev_xmit(): Dropping skb.
[ 1084.620113] blackhole_netdev_xmit(): Dropping skb.
[ 1084.620161] blackhole_netdev_xmit(): Dropping skb.
[ 1084.620202] blackhole_netdev_xmit(): Dropping skb.