[    1.943910] ip (245) used greatest stack depth: 12376 bytes left
[    2.529252] ip (279) used greatest stack depth: 12344 bytes left
[   16.622727] mpls_gso: MPLS GSO support
[  721.802049] blackhole_netdev_xmit(): Dropping skb.
[  721.802112] blackhole_netdev_xmit(): Dropping skb.
[  721.802145] blackhole_netdev_xmit(): Dropping skb.
[  721.802176] blackhole_netdev_xmit(): Dropping skb.