[    2.092434] ip (275) used greatest stack depth: 12320 bytes left
[  639.730877] ip (3139) used greatest stack depth: 12304 bytes left
[  640.162330] ip (3167) used greatest stack depth: 12160 bytes left
[  761.384300] blackhole_netdev_xmit(): Dropping skb.
[  761.384357] blackhole_netdev_xmit(): Dropping skb.
[  761.384390] blackhole_netdev_xmit(): Dropping skb.
[  761.384431] blackhole_netdev_xmit(): Dropping skb.
[  829.479932] blackhole_netdev_xmit(): Dropping skb.
[  829.480001] blackhole_netdev_xmit(): Dropping skb.
[  829.480039] blackhole_netdev_xmit(): Dropping skb.
[  829.480082] blackhole_netdev_xmit(): Dropping skb.
[  859.427111] blackhole_netdev_xmit(): Dropping skb.
[  859.427160] blackhole_netdev_xmit(): Dropping skb.
[  859.427189] blackhole_netdev_xmit(): Dropping skb.
[  859.427220] blackhole_netdev_xmit(): Dropping skb.
[  928.538274] blackhole_netdev_xmit(): Dropping skb.
[  928.538340] blackhole_netdev_xmit(): Dropping skb.
[  928.538378] blackhole_netdev_xmit(): Dropping skb.
[  928.538420] blackhole_netdev_xmit(): Dropping skb.
[ 1055.443798] blackhole_netdev_xmit(): Dropping skb.
[ 1055.443859] blackhole_netdev_xmit(): Dropping skb.
[ 1055.443892] blackhole_netdev_xmit(): Dropping skb.
[ 1055.443926] blackhole_netdev_xmit(): Dropping skb.
[ 1215.925342] blackhole_netdev_xmit(): Dropping skb.
[ 1215.925397] blackhole_netdev_xmit(): Dropping skb.
[ 1215.925433] blackhole_netdev_xmit(): Dropping skb.
[ 1215.925469] blackhole_netdev_xmit(): Dropping skb.