[    2.089131] ip (246) used greatest stack depth: 12384 bytes left
[    2.715531] ip (277) used greatest stack depth: 12352 bytes left
[    9.942272] ip (783) used greatest stack depth: 12072 bytes left
[  700.484827] blackhole_netdev_xmit(): Dropping skb.
[  700.484979] blackhole_netdev_xmit(): Dropping skb.
[  700.485037] blackhole_netdev_xmit(): Dropping skb.
[  700.485098] blackhole_netdev_xmit(): Dropping skb.
[  709.501670] blackhole_netdev_xmit(): Dropping skb.
[  709.501746] blackhole_netdev_xmit(): Dropping skb.
[  709.501796] blackhole_netdev_xmit(): Dropping skb.
[  709.501846] blackhole_netdev_xmit(): Dropping skb.
[  975.141785] blackhole_netdev_xmit(): Dropping skb.
[  975.141865] blackhole_netdev_xmit(): Dropping skb.
[  975.141915] blackhole_netdev_xmit(): Dropping skb.
[  975.141956] blackhole_netdev_xmit(): Dropping skb.
[ 1129.719257] blackhole_netdev_xmit(): Dropping skb.
[ 1129.719327] blackhole_netdev_xmit(): Dropping skb.
[ 1129.719362] blackhole_netdev_xmit(): Dropping skb.
[ 1129.719399] blackhole_netdev_xmit(): Dropping skb.
[ 1212.261021] blackhole_netdev_xmit(): Dropping skb.
[ 1212.261081] blackhole_netdev_xmit(): Dropping skb.
[ 1212.261114] blackhole_netdev_xmit(): Dropping skb.
[ 1212.261147] blackhole_netdev_xmit(): Dropping skb.