[    1.526693] ip (260) used greatest stack depth: 12832 bytes left
[    1.551937] ip (263) used greatest stack depth: 12288 bytes left
[    1.957033] ip (294) used greatest stack depth: 12272 bytes left
[   11.696015] mpls_gso: MPLS GSO support
[  860.312525] blackhole_netdev_xmit(): Dropping skb.
[  860.312585] blackhole_netdev_xmit(): Dropping skb.
[  860.312650] blackhole_netdev_xmit(): Dropping skb.
[  860.312694] blackhole_netdev_xmit(): Dropping skb.