[    2.102398] ip (276) used greatest stack depth: 12320 bytes left
[    8.465680] ip (919) used greatest stack depth: 12304 bytes left
[    9.997058] ip (1087) used greatest stack depth: 12160 bytes left
[  895.127229] blackhole_netdev_xmit(): Dropping skb.
[  895.127302] blackhole_netdev_xmit(): Dropping skb.
[  895.127339] blackhole_netdev_xmit(): Dropping skb.
[  895.127373] blackhole_netdev_xmit(): Dropping skb.
[  895.445852] blackhole_netdev_xmit(): Dropping skb.
[  895.445914] blackhole_netdev_xmit(): Dropping skb.
[  895.445961] blackhole_netdev_xmit(): Dropping skb.
[  895.445997] blackhole_netdev_xmit(): Dropping skb.
[  905.053642] blackhole_netdev_xmit(): Dropping skb.
[  905.053699] blackhole_netdev_xmit(): Dropping skb.
[  905.053730] blackhole_netdev_xmit(): Dropping skb.
[  905.053773] blackhole_netdev_xmit(): Dropping skb.
[ 1049.979108] blackhole_netdev_xmit(): Dropping skb.
[ 1049.979169] blackhole_netdev_xmit(): Dropping skb.
[ 1049.979206] blackhole_netdev_xmit(): Dropping skb.
[ 1049.979251] blackhole_netdev_xmit(): Dropping skb.