[    2.475844] ip (275) used greatest stack depth: 12320 bytes left
[   12.932240] ip (1171) used greatest stack depth: 12224 bytes left
[  699.878249] blackhole_netdev_xmit(): Dropping skb.
[  699.878328] blackhole_netdev_xmit(): Dropping skb.
[  699.878373] blackhole_netdev_xmit(): Dropping skb.
[  699.878422] blackhole_netdev_xmit(): Dropping skb.
[  964.697575] blackhole_netdev_xmit(): Dropping skb.
[  964.697659] blackhole_netdev_xmit(): Dropping skb.
[  964.697722] blackhole_netdev_xmit(): Dropping skb.
[  964.697792] blackhole_netdev_xmit(): Dropping skb.
[  994.066454] blackhole_netdev_xmit(): Dropping skb.
[  994.066514] blackhole_netdev_xmit(): Dropping skb.
[  994.066548] blackhole_netdev_xmit(): Dropping skb.
[  994.066583] blackhole_netdev_xmit(): Dropping skb.
[ 1120.051888] blackhole_netdev_xmit(): Dropping skb.
[ 1120.051951] blackhole_netdev_xmit(): Dropping skb.
[ 1120.051997] blackhole_netdev_xmit(): Dropping skb.
[ 1120.052050] blackhole_netdev_xmit(): Dropping skb.
[ 1176.428156] blackhole_netdev_xmit(): Dropping skb.
[ 1176.428244] blackhole_netdev_xmit(): Dropping skb.
[ 1176.428289] blackhole_netdev_xmit(): Dropping skb.
[ 1176.428339] blackhole_netdev_xmit(): Dropping skb.