[    2.130304] ip (292) used greatest stack depth: 12232 bytes left
[   11.965564] mpls_gso: MPLS GSO support
[   21.721176] ip (2670) used greatest stack depth: 12216 bytes left
[  643.508532] blackhole_netdev_xmit(): Dropping skb.
[  643.508603] blackhole_netdev_xmit(): Dropping skb.
[  643.508648] blackhole_netdev_xmit(): Dropping skb.
[  643.508685] blackhole_netdev_xmit(): Dropping skb.
[ 1072.083230] blackhole_netdev_xmit(): Dropping skb.
[ 1072.083318] blackhole_netdev_xmit(): Dropping skb.
[ 1072.083378] blackhole_netdev_xmit(): Dropping skb.
[ 1072.083439] blackhole_netdev_xmit(): Dropping skb.