[    1.532451] ip (260) used greatest stack depth: 12264 bytes left
[    1.940125] ip (294) used greatest stack depth: 12232 bytes left
[   11.435795] mpls_gso: MPLS GSO support
[   11.705582] ip (1430) used greatest stack depth: 12216 bytes left
[   16.300781] ip (2203) used greatest stack depth: 11960 bytes left
[  644.844264] blackhole_netdev_xmit(): Dropping skb.
[  644.844374] blackhole_netdev_xmit(): Dropping skb.
[  644.844420] blackhole_netdev_xmit(): Dropping skb.
[  644.844462] blackhole_netdev_xmit(): Dropping skb.