[    2.102147] ip (249) used greatest stack depth: 12376 bytes left
[    2.728293] ip (280) used greatest stack depth: 12360 bytes left
[    2.940453] ip (295) used greatest stack depth: 12344 bytes left
[    9.722388] ip (792) used greatest stack depth: 12288 bytes left
[   16.581391] mpls_gso: MPLS GSO support
[  910.968505] blackhole_netdev_xmit(): Dropping skb.
[  910.968574] blackhole_netdev_xmit(): Dropping skb.
[  910.968620] blackhole_netdev_xmit(): Dropping skb.
[  910.968667] blackhole_netdev_xmit(): Dropping skb.