[    2.854241] ip (301) used greatest stack depth: 12384 bytes left
[   17.575064] mpls_gso: MPLS GSO support
[  656.133777] ip (21813) used greatest stack depth: 12320 bytes left
[  664.073893] blackhole_netdev_xmit(): Dropping skb.
[  664.073955] blackhole_netdev_xmit(): Dropping skb.
[  664.073989] blackhole_netdev_xmit(): Dropping skb.
[  664.074033] blackhole_netdev_xmit(): Dropping skb.