[    1.983945] ip (247) used greatest stack depth: 12376 bytes left
[    2.626794] ip (281) used greatest stack depth: 12344 bytes left
[   10.895216] ip (933) used greatest stack depth: 12328 bytes left
[   15.860564] mpls_gso: MPLS GSO support
[  666.775972] blackhole_netdev_xmit(): Dropping skb.
[  666.776054] blackhole_netdev_xmit(): Dropping skb.
[  666.776103] blackhole_netdev_xmit(): Dropping skb.
[  666.776149] blackhole_netdev_xmit(): Dropping skb.