[   39.666992][  T275] ip (275) used greatest stack depth: 24528 bytes left
[   45.137448][  T313] ip (313) used greatest stack depth: 23904 bytes left
[ 1698.956493][T13407] blackhole_netdev_xmit(): Dropping skb.
[ 1698.956882][T13407] blackhole_netdev_xmit(): Dropping skb.
[ 1698.957108][T13407] blackhole_netdev_xmit(): Dropping skb.
[ 1698.957334][T13407] blackhole_netdev_xmit(): Dropping skb.
[ 1790.878726][T13408] blackhole_netdev_xmit(): Dropping skb.
[ 1790.879056][T13408] blackhole_netdev_xmit(): Dropping skb.
[ 1790.879275][T13408] blackhole_netdev_xmit(): Dropping skb.
[ 1790.879495][T13408] blackhole_netdev_xmit(): Dropping skb.