[    2.128132] ip (275) used greatest stack depth: 12320 bytes left
[    4.419108] ip (400) used greatest stack depth: 12304 bytes left
[  323.346614] ip (7525) used greatest stack depth: 12176 bytes left
[  744.599143] blackhole_netdev_xmit(): Dropping skb.
[  744.599199] blackhole_netdev_xmit(): Dropping skb.
[  744.599234] blackhole_netdev_xmit(): Dropping skb.
[  744.599273] blackhole_netdev_xmit(): Dropping skb.
[  748.789869] blackhole_netdev_xmit(): Dropping skb.
[  748.789926] blackhole_netdev_xmit(): Dropping skb.
[  748.789963] blackhole_netdev_xmit(): Dropping skb.
[  748.789996] blackhole_netdev_xmit(): Dropping skb.
[  914.278109] blackhole_netdev_xmit(): Dropping skb.
[  914.278194] blackhole_netdev_xmit(): Dropping skb.
[  914.278253] blackhole_netdev_xmit(): Dropping skb.
[  914.278316] blackhole_netdev_xmit(): Dropping skb.
[ 1137.231916] blackhole_netdev_xmit(): Dropping skb.
[ 1137.231983] blackhole_netdev_xmit(): Dropping skb.
[ 1137.232027] blackhole_netdev_xmit(): Dropping skb.
[ 1137.232075] blackhole_netdev_xmit(): Dropping skb.
[ 1188.943186] blackhole_netdev_xmit(): Dropping skb.
[ 1188.943243] blackhole_netdev_xmit(): Dropping skb.
[ 1188.943280] blackhole_netdev_xmit(): Dropping skb.
[ 1188.943321] blackhole_netdev_xmit(): Dropping skb.
[ 1228.607719] blackhole_netdev_xmit(): Dropping skb.
[ 1228.607769] blackhole_netdev_xmit(): Dropping skb.
[ 1228.607804] blackhole_netdev_xmit(): Dropping skb.
[ 1228.607850] blackhole_netdev_xmit(): Dropping skb.