[    2.212707] ip (243) used greatest stack depth: 12328 bytes left
[    9.225268] ip (781) used greatest stack depth: 12296 bytes left
[   23.742571] ip (2365) used greatest stack depth: 12184 bytes left
[  656.916554] blackhole_netdev_xmit(): Dropping skb.
[  656.916633] blackhole_netdev_xmit(): Dropping skb.
[  656.916685] blackhole_netdev_xmit(): Dropping skb.
[  656.916727] blackhole_netdev_xmit(): Dropping skb.
[ 1052.382563] blackhole_netdev_xmit(): Dropping skb.
[ 1052.382740] blackhole_netdev_xmit(): Dropping skb.
[ 1052.382811] blackhole_netdev_xmit(): Dropping skb.
[ 1052.382890] blackhole_netdev_xmit(): Dropping skb.
[ 1058.317137] blackhole_netdev_xmit(): Dropping skb.
[ 1058.317229] blackhole_netdev_xmit(): Dropping skb.
[ 1058.317310] blackhole_netdev_xmit(): Dropping skb.
[ 1058.317380] blackhole_netdev_xmit(): Dropping skb.
[ 1202.078851] blackhole_netdev_xmit(): Dropping skb.
[ 1202.078924] blackhole_netdev_xmit(): Dropping skb.
[ 1202.078984] blackhole_netdev_xmit(): Dropping skb.
[ 1202.079052] blackhole_netdev_xmit(): Dropping skb.