[    2.647896] ip (281) used greatest stack depth: 12360 bytes left
[    2.692769] ip (285) used greatest stack depth: 12344 bytes left
[  330.256235] ip (482) used greatest stack depth: 12304 bytes left
[  668.929466] blackhole_netdev_xmit(): Dropping skb.
[  668.929520] blackhole_netdev_xmit(): Dropping skb.
[  668.929550] blackhole_netdev_xmit(): Dropping skb.
[  668.929575] blackhole_netdev_xmit(): Dropping skb.
[  798.609339] blackhole_netdev_xmit(): Dropping skb.
[  798.609402] blackhole_netdev_xmit(): Dropping skb.
[  798.609435] blackhole_netdev_xmit(): Dropping skb.
[  798.609470] blackhole_netdev_xmit(): Dropping skb.
[  865.870385] blackhole_netdev_xmit(): Dropping skb.
[  865.870436] blackhole_netdev_xmit(): Dropping skb.
[  865.870472] blackhole_netdev_xmit(): Dropping skb.
[  865.870513] blackhole_netdev_xmit(): Dropping skb.
[ 1055.600308] blackhole_netdev_xmit(): Dropping skb.
[ 1055.600385] blackhole_netdev_xmit(): Dropping skb.
[ 1055.600428] blackhole_netdev_xmit(): Dropping skb.
[ 1055.600470] blackhole_netdev_xmit(): Dropping skb.
[ 1096.805352] blackhole_netdev_xmit(): Dropping skb.
[ 1096.805419] blackhole_netdev_xmit(): Dropping skb.
[ 1096.805466] blackhole_netdev_xmit(): Dropping skb.
[ 1096.805518] blackhole_netdev_xmit(): Dropping skb.