[    2.037371] ip (245) used greatest stack depth: 12320 bytes left
[  123.175614] hrtimer: interrupt took 6782721 ns
[  327.459225] ip (6607) used greatest stack depth: 12160 bytes left
[ 1066.973055] blackhole_netdev_xmit(): Dropping skb.
[ 1066.973122] blackhole_netdev_xmit(): Dropping skb.
[ 1066.973157] blackhole_netdev_xmit(): Dropping skb.
[ 1066.973191] blackhole_netdev_xmit(): Dropping skb.
[ 1077.686763] blackhole_netdev_xmit(): Dropping skb.
[ 1077.686830] blackhole_netdev_xmit(): Dropping skb.
[ 1077.686869] blackhole_netdev_xmit(): Dropping skb.
[ 1077.686905] blackhole_netdev_xmit(): Dropping skb.
[ 1110.638576] blackhole_netdev_xmit(): Dropping skb.
[ 1110.638633] blackhole_netdev_xmit(): Dropping skb.
[ 1110.638667] blackhole_netdev_xmit(): Dropping skb.
[ 1110.638701] blackhole_netdev_xmit(): Dropping skb.
[ 1190.873230] blackhole_netdev_xmit(): Dropping skb.
[ 1190.873291] blackhole_netdev_xmit(): Dropping skb.
[ 1190.873326] blackhole_netdev_xmit(): Dropping skb.
[ 1190.873366] blackhole_netdev_xmit(): Dropping skb.