[    2.309258] ip (275) used greatest stack depth: 12320 bytes left
[    2.352532] ip (280) used greatest stack depth: 12272 bytes left
[  905.940838] blackhole_netdev_xmit(): Dropping skb.
[  905.940904] blackhole_netdev_xmit(): Dropping skb.
[  905.940936] blackhole_netdev_xmit(): Dropping skb.
[  905.940967] blackhole_netdev_xmit(): Dropping skb.
[  960.700201] blackhole_netdev_xmit(): Dropping skb.
[  960.700288] blackhole_netdev_xmit(): Dropping skb.
[  960.700347] blackhole_netdev_xmit(): Dropping skb.
[  960.700420] blackhole_netdev_xmit(): Dropping skb.
[ 1121.750483] blackhole_netdev_xmit(): Dropping skb.
[ 1121.750548] blackhole_netdev_xmit(): Dropping skb.
[ 1121.750605] blackhole_netdev_xmit(): Dropping skb.
[ 1121.750658] blackhole_netdev_xmit(): Dropping skb.