[    2.315043] ip (277) used greatest stack depth: 12336 bytes left
[   20.440163] ip (2109) used greatest stack depth: 12320 bytes left
[  648.097599] ip (20962) used greatest stack depth: 12296 bytes left
[  918.697240] blackhole_netdev_xmit(): Dropping skb.
[  918.697304] blackhole_netdev_xmit(): Dropping skb.
[  918.697341] blackhole_netdev_xmit(): Dropping skb.
[  918.697376] blackhole_netdev_xmit(): Dropping skb.
[  961.467637] blackhole_netdev_xmit(): Dropping skb.
[  961.467699] blackhole_netdev_xmit(): Dropping skb.
[  961.467732] blackhole_netdev_xmit(): Dropping skb.
[  961.467759] blackhole_netdev_xmit(): Dropping skb.
[ 1034.305562] blackhole_netdev_xmit(): Dropping skb.
[ 1034.305629] blackhole_netdev_xmit(): Dropping skb.
[ 1034.305662] blackhole_netdev_xmit(): Dropping skb.
[ 1034.305703] blackhole_netdev_xmit(): Dropping skb.
[ 1119.675281] blackhole_netdev_xmit(): Dropping skb.
[ 1119.675357] blackhole_netdev_xmit(): Dropping skb.
[ 1119.675395] blackhole_netdev_xmit(): Dropping skb.
[ 1119.675430] blackhole_netdev_xmit(): Dropping skb.
[ 1147.865184] blackhole_netdev_xmit(): Dropping skb.
[ 1147.865240] blackhole_netdev_xmit(): Dropping skb.
[ 1147.865274] blackhole_netdev_xmit(): Dropping skb.
[ 1147.865310] blackhole_netdev_xmit(): Dropping skb.
[ 1152.582607] blackhole_netdev_xmit(): Dropping skb.
[ 1152.582676] blackhole_netdev_xmit(): Dropping skb.
[ 1152.582721] blackhole_netdev_xmit(): Dropping skb.
[ 1152.582764] blackhole_netdev_xmit(): Dropping skb.
[ 1190.415251] blackhole_netdev_xmit(): Dropping skb.
[ 1190.415314] blackhole_netdev_xmit(): Dropping skb.
[ 1190.415347] blackhole_netdev_xmit(): Dropping skb.
[ 1190.415382] blackhole_netdev_xmit(): Dropping skb.
[ 1235.987413] blackhole_netdev_xmit(): Dropping skb.
[ 1235.987473] blackhole_netdev_xmit(): Dropping skb.
[ 1235.987518] blackhole_netdev_xmit(): Dropping skb.
[ 1235.987567] blackhole_netdev_xmit(): Dropping skb.