[    1.726760] ip (242) used greatest stack depth: 12592 bytes left
[    1.755031] ip (245) used greatest stack depth: 12352 bytes left
[    2.217282] ip (276) used greatest stack depth: 12320 bytes left
[  626.893489] ip (14624) used greatest stack depth: 12304 bytes left
[  675.889386] blackhole_netdev_xmit(): Dropping skb.
[  675.889448] blackhole_netdev_xmit(): Dropping skb.
[  675.889487] blackhole_netdev_xmit(): Dropping skb.
[  675.889526] blackhole_netdev_xmit(): Dropping skb.
[  984.937720] blackhole_netdev_xmit(): Dropping skb.
[  984.937802] blackhole_netdev_xmit(): Dropping skb.
[  984.937852] blackhole_netdev_xmit(): Dropping skb.
[  984.937892] blackhole_netdev_xmit(): Dropping skb.
[ 1119.094862] blackhole_netdev_xmit(): Dropping skb.
[ 1119.094921] blackhole_netdev_xmit(): Dropping skb.
[ 1119.094956] blackhole_netdev_xmit(): Dropping skb.
[ 1119.094988] blackhole_netdev_xmit(): Dropping skb.
[ 1154.401074] blackhole_netdev_xmit(): Dropping skb.
[ 1154.401143] blackhole_netdev_xmit(): Dropping skb.
[ 1154.401183] blackhole_netdev_xmit(): Dropping skb.
[ 1154.401223] blackhole_netdev_xmit(): Dropping skb.