[    2.401032] ip (275) used greatest stack depth: 12320 bytes left
[   26.072111] ip (2338) used greatest stack depth: 12304 bytes left
[  651.412809] ip (21997) used greatest stack depth: 12272 bytes left
[  769.205745] blackhole_netdev_xmit(): Dropping skb.
[  769.205821] blackhole_netdev_xmit(): Dropping skb.
[  769.205873] blackhole_netdev_xmit(): Dropping skb.
[  769.205921] blackhole_netdev_xmit(): Dropping skb.
[  789.997971] blackhole_netdev_xmit(): Dropping skb.
[  789.998033] blackhole_netdev_xmit(): Dropping skb.
[  789.998067] blackhole_netdev_xmit(): Dropping skb.
[  789.998110] blackhole_netdev_xmit(): Dropping skb.
[  922.918237] blackhole_netdev_xmit(): Dropping skb.
[  922.918317] blackhole_netdev_xmit(): Dropping skb.
[  922.918359] blackhole_netdev_xmit(): Dropping skb.
[  922.918396] blackhole_netdev_xmit(): Dropping skb.
[  929.905461] blackhole_netdev_xmit(): Dropping skb.
[  929.905532] blackhole_netdev_xmit(): Dropping skb.
[  929.905580] blackhole_netdev_xmit(): Dropping skb.
[  929.905627] blackhole_netdev_xmit(): Dropping skb.
[ 1232.364848] blackhole_netdev_xmit(): Dropping skb.
[ 1232.364899] blackhole_netdev_xmit(): Dropping skb.
[ 1232.364933] blackhole_netdev_xmit(): Dropping skb.
[ 1232.364966] blackhole_netdev_xmit(): Dropping skb.