[    1.836571] ip (248) used greatest stack depth: 12304 bytes left
[    2.413570] ip (290) used greatest stack depth: 12000 bytes left
[  650.006380] blackhole_netdev_xmit(): Dropping skb.
[  650.006455] blackhole_netdev_xmit(): Dropping skb.
[  650.006488] blackhole_netdev_xmit(): Dropping skb.
[  650.006520] blackhole_netdev_xmit(): Dropping skb.
[  933.395509] blackhole_netdev_xmit(): Dropping skb.
[  933.395578] blackhole_netdev_xmit(): Dropping skb.
[  933.395613] blackhole_netdev_xmit(): Dropping skb.
[  933.395649] blackhole_netdev_xmit(): Dropping skb.
[  961.762717] blackhole_netdev_xmit(): Dropping skb.
[  961.762786] blackhole_netdev_xmit(): Dropping skb.
[  961.762820] blackhole_netdev_xmit(): Dropping skb.
[  961.762855] blackhole_netdev_xmit(): Dropping skb.
[ 1228.208077] blackhole_netdev_xmit(): Dropping skb.
[ 1228.208182] blackhole_netdev_xmit(): Dropping skb.
[ 1228.208248] blackhole_netdev_xmit(): Dropping skb.
[ 1228.208316] blackhole_netdev_xmit(): Dropping skb.