[    2.055373] ip (258) used greatest stack depth: 12416 bytes left
[    2.652696] ip (292) used greatest stack depth: 12384 bytes left
[    9.091632] ip (698) used greatest stack depth: 12320 bytes left
[   17.434671] mpls_gso: MPLS GSO support
[  643.484184] ip (20335) used greatest stack depth: 12256 bytes left
[ 1193.311683] blackhole_netdev_xmit(): Dropping skb.
[ 1193.311775] blackhole_netdev_xmit(): Dropping skb.
[ 1193.311832] blackhole_netdev_xmit(): Dropping skb.
[ 1193.311870] blackhole_netdev_xmit(): Dropping skb.