[    1.775110] ip (260) used greatest stack depth: 12832 bytes left
[    1.798918] ip (263) used greatest stack depth: 12288 bytes left
[    2.191043] ip (294) used greatest stack depth: 12272 bytes left
[   11.306229] ip (1240) used greatest stack depth: 12128 bytes left
[   12.187828] mpls_gso: MPLS GSO support
[  646.638479] blackhole_netdev_xmit(): Dropping skb.
[  646.638585] blackhole_netdev_xmit(): Dropping skb.
[  646.638661] blackhole_netdev_xmit(): Dropping skb.
[  646.638729] blackhole_netdev_xmit(): Dropping skb.