[    2.674985] ip (276) used greatest stack depth: 12320 bytes left
[   12.617657] ip (1086) used greatest stack depth: 12048 bytes left
[  649.927226] blackhole_netdev_xmit(): Dropping skb.
[  649.927388] blackhole_netdev_xmit(): Dropping skb.
[  649.927436] blackhole_netdev_xmit(): Dropping skb.
[  649.927491] blackhole_netdev_xmit(): Dropping skb.
[  665.236319] blackhole_netdev_xmit(): Dropping skb.
[  665.236403] blackhole_netdev_xmit(): Dropping skb.
[  665.236459] blackhole_netdev_xmit(): Dropping skb.
[  665.236528] blackhole_netdev_xmit(): Dropping skb.
[  708.587393] blackhole_netdev_xmit(): Dropping skb.
[  708.587447] blackhole_netdev_xmit(): Dropping skb.
[  708.587482] blackhole_netdev_xmit(): Dropping skb.
[  708.587517] blackhole_netdev_xmit(): Dropping skb.
[  712.640473] blackhole_netdev_xmit(): Dropping skb.
[  712.640528] blackhole_netdev_xmit(): Dropping skb.
[  712.640558] blackhole_netdev_xmit(): Dropping skb.
[  712.640590] blackhole_netdev_xmit(): Dropping skb.
[  745.735030] blackhole_netdev_xmit(): Dropping skb.
[  745.735079] blackhole_netdev_xmit(): Dropping skb.
[  745.735109] blackhole_netdev_xmit(): Dropping skb.
[  745.735140] blackhole_netdev_xmit(): Dropping skb.
[  901.652417] blackhole_netdev_xmit(): Dropping skb.
[  901.652479] blackhole_netdev_xmit(): Dropping skb.
[  901.652529] blackhole_netdev_xmit(): Dropping skb.
[  901.652570] blackhole_netdev_xmit(): Dropping skb.