[    1.639580] ip (260) used greatest stack depth: 12288 bytes left
[    2.126824] ip (294) used greatest stack depth: 12272 bytes left
[   12.609456] mpls_gso: MPLS GSO support
[  683.337970] blackhole_netdev_xmit(): Dropping skb.
[  683.338039] blackhole_netdev_xmit(): Dropping skb.
[  683.338086] blackhole_netdev_xmit(): Dropping skb.
[  683.338140] blackhole_netdev_xmit(): Dropping skb.