[    2.305023] ip (273) used greatest stack depth: 12344 bytes left
[  596.208945] hrtimer: interrupt took 10578207 ns
[  743.774873] blackhole_netdev_xmit(): Dropping skb.
[  743.774928] blackhole_netdev_xmit(): Dropping skb.
[  743.774959] blackhole_netdev_xmit(): Dropping skb.
[  743.775002] blackhole_netdev_xmit(): Dropping skb.
[ 1123.058087] blackhole_netdev_xmit(): Dropping skb.
[ 1123.058148] blackhole_netdev_xmit(): Dropping skb.
[ 1123.058182] blackhole_netdev_xmit(): Dropping skb.
[ 1123.058213] blackhole_netdev_xmit(): Dropping skb.