[    1.905449] ip (242) used greatest stack depth: 12352 bytes left
[    1.977590] ip (248) used greatest stack depth: 12304 bytes left
[   26.558092] ip (2508) used greatest stack depth: 12160 bytes left
[  965.822258] blackhole_netdev_xmit(): Dropping skb.
[  965.822323] blackhole_netdev_xmit(): Dropping skb.
[  965.822355] blackhole_netdev_xmit(): Dropping skb.
[  965.822394] blackhole_netdev_xmit(): Dropping skb.
[  972.108495] blackhole_netdev_xmit(): Dropping skb.
[  972.108564] blackhole_netdev_xmit(): Dropping skb.
[  972.108614] blackhole_netdev_xmit(): Dropping skb.
[  972.108673] blackhole_netdev_xmit(): Dropping skb.
[ 1056.983741] blackhole_netdev_xmit(): Dropping skb.
[ 1056.983809] blackhole_netdev_xmit(): Dropping skb.
[ 1056.983853] blackhole_netdev_xmit(): Dropping skb.
[ 1056.983886] blackhole_netdev_xmit(): Dropping skb.