[    2.438400] ip (277) used greatest stack depth: 12360 bytes left
[    2.486563] ip (281) used greatest stack depth: 12344 bytes left
[  632.620478] ip (16830) used greatest stack depth: 12328 bytes left
[  770.615473] blackhole_netdev_xmit(): Dropping skb.
[  770.615535] blackhole_netdev_xmit(): Dropping skb.
[  770.615569] blackhole_netdev_xmit(): Dropping skb.
[  770.615605] blackhole_netdev_xmit(): Dropping skb.
[  859.973193] blackhole_netdev_xmit(): Dropping skb.
[  859.973262] blackhole_netdev_xmit(): Dropping skb.
[  859.973327] blackhole_netdev_xmit(): Dropping skb.
[  859.973392] blackhole_netdev_xmit(): Dropping skb.
[  864.732991] blackhole_netdev_xmit(): Dropping skb.
[  864.733046] blackhole_netdev_xmit(): Dropping skb.
[  864.733093] blackhole_netdev_xmit(): Dropping skb.
[  864.733137] blackhole_netdev_xmit(): Dropping skb.
[  867.682306] blackhole_netdev_xmit(): Dropping skb.
[  867.682357] blackhole_netdev_xmit(): Dropping skb.
[  867.682389] blackhole_netdev_xmit(): Dropping skb.
[  867.682416] blackhole_netdev_xmit(): Dropping skb.
[  868.190001] blackhole_netdev_xmit(): Dropping skb.
[  868.190053] blackhole_netdev_xmit(): Dropping skb.
[  868.190086] blackhole_netdev_xmit(): Dropping skb.
[  868.190114] blackhole_netdev_xmit(): Dropping skb.
[  872.956173] blackhole_netdev_xmit(): Dropping skb.
[  872.956225] blackhole_netdev_xmit(): Dropping skb.
[  872.956258] blackhole_netdev_xmit(): Dropping skb.
[  872.956317] blackhole_netdev_xmit(): Dropping skb.