[    2.796147] ip (276) used greatest stack depth: 12320 bytes left
[   19.440702] ip (1368) used greatest stack depth: 12304 bytes left
[  733.315674] blackhole_netdev_xmit(): Dropping skb.
[  733.315799] blackhole_netdev_xmit(): Dropping skb.
[  733.315839] blackhole_netdev_xmit(): Dropping skb.
[  733.315871] blackhole_netdev_xmit(): Dropping skb.
[  757.805964] blackhole_netdev_xmit(): Dropping skb.
[  757.806017] blackhole_netdev_xmit(): Dropping skb.
[  757.806051] blackhole_netdev_xmit(): Dropping skb.
[  757.806080] blackhole_netdev_xmit(): Dropping skb.
[  983.587202] blackhole_netdev_xmit(): Dropping skb.
[  983.587258] blackhole_netdev_xmit(): Dropping skb.
[  983.587288] blackhole_netdev_xmit(): Dropping skb.
[  983.587313] blackhole_netdev_xmit(): Dropping skb.
[ 1057.278785] blackhole_netdev_xmit(): Dropping skb.
[ 1057.278840] blackhole_netdev_xmit(): Dropping skb.
[ 1057.278871] blackhole_netdev_xmit(): Dropping skb.
[ 1057.278896] blackhole_netdev_xmit(): Dropping skb.
[ 1209.638323] blackhole_netdev_xmit(): Dropping skb.
[ 1209.638385] blackhole_netdev_xmit(): Dropping skb.
[ 1209.638421] blackhole_netdev_xmit(): Dropping skb.
[ 1209.638456] blackhole_netdev_xmit(): Dropping skb.