[    1.995267] ip (275) used greatest stack depth: 12320 bytes left
[   10.933408] ip (1184) used greatest stack depth: 12272 bytes left
[ 1026.500767] blackhole_netdev_xmit(): Dropping skb.
[ 1026.500830] blackhole_netdev_xmit(): Dropping skb.
[ 1026.500861] blackhole_netdev_xmit(): Dropping skb.
[ 1026.500887] blackhole_netdev_xmit(): Dropping skb.
[ 1147.897036] blackhole_netdev_xmit(): Dropping skb.
[ 1147.897083] blackhole_netdev_xmit(): Dropping skb.
[ 1147.897114] blackhole_netdev_xmit(): Dropping skb.
[ 1147.897139] blackhole_netdev_xmit(): Dropping skb.
[ 1234.471092] blackhole_netdev_xmit(): Dropping skb.
[ 1234.471154] blackhole_netdev_xmit(): Dropping skb.
[ 1234.471185] blackhole_netdev_xmit(): Dropping skb.
[ 1234.471213] blackhole_netdev_xmit(): Dropping skb.