[    2.537622] ip (275) used greatest stack depth: 12320 bytes left
[   10.733558] ip (917) used greatest stack depth: 12304 bytes left
[  793.100885] blackhole_netdev_xmit(): Dropping skb.
[  793.100951] blackhole_netdev_xmit(): Dropping skb.
[  793.100987] blackhole_netdev_xmit(): Dropping skb.
[  793.101022] blackhole_netdev_xmit(): Dropping skb.
[  872.527975] blackhole_netdev_xmit(): Dropping skb.
[  872.528043] blackhole_netdev_xmit(): Dropping skb.
[  872.528077] blackhole_netdev_xmit(): Dropping skb.
[  872.528109] blackhole_netdev_xmit(): Dropping skb.
[ 1061.784214] blackhole_netdev_xmit(): Dropping skb.
[ 1061.784287] blackhole_netdev_xmit(): Dropping skb.
[ 1061.784328] blackhole_netdev_xmit(): Dropping skb.
[ 1061.784362] blackhole_netdev_xmit(): Dropping skb.