[    1.995694] ip (244) used greatest stack depth: 12376 bytes left
[    2.612466] ip (278) used greatest stack depth: 12360 bytes left
[    5.912198] ip (449) used greatest stack depth: 12344 bytes left
[   15.381041] mpls_gso: MPLS GSO support
[  880.536039] blackhole_netdev_xmit(): Dropping skb.
[  880.536107] blackhole_netdev_xmit(): Dropping skb.
[  880.536144] blackhole_netdev_xmit(): Dropping skb.
[  880.536177] blackhole_netdev_xmit(): Dropping skb.