[    2.481310] ip (277) used greatest stack depth: 12352 bytes left
[  635.829505] ip (22884) used greatest stack depth: 12216 bytes left
[  708.133462] blackhole_netdev_xmit(): Dropping skb.
[  708.133515] blackhole_netdev_xmit(): Dropping skb.
[  708.133546] blackhole_netdev_xmit(): Dropping skb.
[  708.133572] blackhole_netdev_xmit(): Dropping skb.
[  714.794698] blackhole_netdev_xmit(): Dropping skb.
[  714.794746] blackhole_netdev_xmit(): Dropping skb.
[  714.794777] blackhole_netdev_xmit(): Dropping skb.
[  714.794802] blackhole_netdev_xmit(): Dropping skb.
[  742.479715] blackhole_netdev_xmit(): Dropping skb.
[  742.479792] blackhole_netdev_xmit(): Dropping skb.
[  742.479839] blackhole_netdev_xmit(): Dropping skb.
[  742.479876] blackhole_netdev_xmit(): Dropping skb.
[  748.019011] blackhole_netdev_xmit(): Dropping skb.
[  748.019066] blackhole_netdev_xmit(): Dropping skb.
[  748.019100] blackhole_netdev_xmit(): Dropping skb.
[  748.019134] blackhole_netdev_xmit(): Dropping skb.
[  967.846391] blackhole_netdev_xmit(): Dropping skb.
[  967.846451] blackhole_netdev_xmit(): Dropping skb.
[  967.846487] blackhole_netdev_xmit(): Dropping skb.
[  967.846524] blackhole_netdev_xmit(): Dropping skb.
[  993.694940] blackhole_netdev_xmit(): Dropping skb.
[  993.695001] blackhole_netdev_xmit(): Dropping skb.
[  993.695042] blackhole_netdev_xmit(): Dropping skb.
[  993.695078] blackhole_netdev_xmit(): Dropping skb.
[ 1217.769458] blackhole_netdev_xmit(): Dropping skb.
[ 1217.769535] blackhole_netdev_xmit(): Dropping skb.
[ 1217.769579] blackhole_netdev_xmit(): Dropping skb.
[ 1217.769616] blackhole_netdev_xmit(): Dropping skb.