[    2.449638] ip (276) used greatest stack depth: 12368 bytes left
[    2.495958] ip (280) used greatest stack depth: 12352 bytes left
[   14.695164] ip (1368) used greatest stack depth: 12336 bytes left
[   25.158357] ip (2493) used greatest stack depth: 12168 bytes left
[  699.549032] blackhole_netdev_xmit(): Dropping skb.
[  699.549093] blackhole_netdev_xmit(): Dropping skb.
[  699.549129] blackhole_netdev_xmit(): Dropping skb.
[  699.549168] blackhole_netdev_xmit(): Dropping skb.
[  978.739664] blackhole_netdev_xmit(): Dropping skb.
[  978.739736] blackhole_netdev_xmit(): Dropping skb.
[  978.739781] blackhole_netdev_xmit(): Dropping skb.
[  978.739832] blackhole_netdev_xmit(): Dropping skb.
[ 1024.198735] blackhole_netdev_xmit(): Dropping skb.
[ 1024.198804] blackhole_netdev_xmit(): Dropping skb.
[ 1024.198840] blackhole_netdev_xmit(): Dropping skb.
[ 1024.198877] blackhole_netdev_xmit(): Dropping skb.
[ 1052.876277] blackhole_netdev_xmit(): Dropping skb.
[ 1052.876344] blackhole_netdev_xmit(): Dropping skb.
[ 1052.876388] blackhole_netdev_xmit(): Dropping skb.
[ 1052.876439] blackhole_netdev_xmit(): Dropping skb.