[    1.618316] ip (247) used greatest stack depth: 12304 bytes left
[    9.777792] ip (1076) used greatest stack depth: 12272 bytes left
[  715.144838] blackhole_netdev_xmit(): Dropping skb.
[  715.145007] blackhole_netdev_xmit(): Dropping skb.
[  715.145048] blackhole_netdev_xmit(): Dropping skb.
[  715.145091] blackhole_netdev_xmit(): Dropping skb.
[  939.314721] blackhole_netdev_xmit(): Dropping skb.
[  939.314809] blackhole_netdev_xmit(): Dropping skb.
[  939.314855] blackhole_netdev_xmit(): Dropping skb.
[  939.314899] blackhole_netdev_xmit(): Dropping skb.
[ 1066.335271] blackhole_netdev_xmit(): Dropping skb.
[ 1066.335349] blackhole_netdev_xmit(): Dropping skb.
[ 1066.335401] blackhole_netdev_xmit(): Dropping skb.
[ 1066.335458] blackhole_netdev_xmit(): Dropping skb.