[    2.231371] ip (256) used greatest stack depth: 12376 bytes left
[    2.928345] ip (290) used greatest stack depth: 12360 bytes left
[    2.985819] ip (294) used greatest stack depth: 12344 bytes left
[   16.770255] mpls_gso: MPLS GSO support
[  633.405510] ip (25151) used greatest stack depth: 12192 bytes left
[  721.807041] blackhole_netdev_xmit(): Dropping skb.
[  721.807113] blackhole_netdev_xmit(): Dropping skb.
[  721.807155] blackhole_netdev_xmit(): Dropping skb.
[  721.807198] blackhole_netdev_xmit(): Dropping skb.