[    2.063562] ip (273) used greatest stack depth: 12320 bytes left
[   19.080872] ip (2366) used greatest stack depth: 12272 bytes left
[  829.540582] blackhole_netdev_xmit(): Dropping skb.
[  829.540654] blackhole_netdev_xmit(): Dropping skb.
[  829.540687] blackhole_netdev_xmit(): Dropping skb.
[  829.540724] blackhole_netdev_xmit(): Dropping skb.
[  992.025218] blackhole_netdev_xmit(): Dropping skb.
[  992.025293] blackhole_netdev_xmit(): Dropping skb.
[  992.025336] blackhole_netdev_xmit(): Dropping skb.
[  992.025373] blackhole_netdev_xmit(): Dropping skb.
[ 1016.076442] blackhole_netdev_xmit(): Dropping skb.
[ 1016.076520] blackhole_netdev_xmit(): Dropping skb.
[ 1016.076573] blackhole_netdev_xmit(): Dropping skb.
[ 1016.076622] blackhole_netdev_xmit(): Dropping skb.
[ 1071.615273] blackhole_netdev_xmit(): Dropping skb.
[ 1071.615342] blackhole_netdev_xmit(): Dropping skb.
[ 1071.615396] blackhole_netdev_xmit(): Dropping skb.
[ 1071.615454] blackhole_netdev_xmit(): Dropping skb.
[ 1203.694747] blackhole_netdev_xmit(): Dropping skb.
[ 1203.694803] blackhole_netdev_xmit(): Dropping skb.
[ 1203.694837] blackhole_netdev_xmit(): Dropping skb.
[ 1203.694871] blackhole_netdev_xmit(): Dropping skb.