[    2.213040] ip (276) used greatest stack depth: 12320 bytes left
[    2.388776] ip (290) used greatest stack depth: 12160 bytes left
[   24.294590] ip (2611) used greatest stack depth: 12048 bytes left
[  988.950797] blackhole_netdev_xmit(): Dropping skb.
[  988.950892] blackhole_netdev_xmit(): Dropping skb.
[  988.950951] blackhole_netdev_xmit(): Dropping skb.
[  988.951014] blackhole_netdev_xmit(): Dropping skb.
[ 1048.108188] blackhole_netdev_xmit(): Dropping skb.
[ 1048.108245] blackhole_netdev_xmit(): Dropping skb.
[ 1048.108278] blackhole_netdev_xmit(): Dropping skb.
[ 1048.108309] blackhole_netdev_xmit(): Dropping skb.
[ 1060.734874] blackhole_netdev_xmit(): Dropping skb.
[ 1060.734927] blackhole_netdev_xmit(): Dropping skb.
[ 1060.734968] blackhole_netdev_xmit(): Dropping skb.
[ 1060.735006] blackhole_netdev_xmit(): Dropping skb.
[ 1076.420457] blackhole_netdev_xmit(): Dropping skb.
[ 1076.420511] blackhole_netdev_xmit(): Dropping skb.
[ 1076.420542] blackhole_netdev_xmit(): Dropping skb.
[ 1076.420569] blackhole_netdev_xmit(): Dropping skb.
[ 1085.522804] blackhole_netdev_xmit(): Dropping skb.
[ 1085.522853] blackhole_netdev_xmit(): Dropping skb.
[ 1085.522887] blackhole_netdev_xmit(): Dropping skb.
[ 1085.522921] blackhole_netdev_xmit(): Dropping skb.