[    1.885925] ip (240) used greatest stack depth: 12352 bytes left
[    2.558146] ip (274) used greatest stack depth: 12320 bytes left
[   11.726136] ip (959) used greatest stack depth: 12160 bytes left
[ 1047.658515] blackhole_netdev_xmit(): Dropping skb.
[ 1047.658606] blackhole_netdev_xmit(): Dropping skb.
[ 1047.658653] blackhole_netdev_xmit(): Dropping skb.
[ 1047.658706] blackhole_netdev_xmit(): Dropping skb.
[ 1154.043994] blackhole_netdev_xmit(): Dropping skb.
[ 1154.044052] blackhole_netdev_xmit(): Dropping skb.
[ 1154.044085] blackhole_netdev_xmit(): Dropping skb.
[ 1154.044119] blackhole_netdev_xmit(): Dropping skb.
[ 1205.455210] blackhole_netdev_xmit(): Dropping skb.
[ 1205.455271] blackhole_netdev_xmit(): Dropping skb.
[ 1205.455303] blackhole_netdev_xmit(): Dropping skb.
[ 1205.455329] blackhole_netdev_xmit(): Dropping skb.