[    2.031343] ip (293) used greatest stack depth: 12272 bytes left
[    4.564056] ip (428) used greatest stack depth: 12240 bytes left
[   12.105795] mpls_gso: MPLS GSO support
[  826.268433] blackhole_netdev_xmit(): Dropping skb.
[  826.268503] blackhole_netdev_xmit(): Dropping skb.
[  826.268555] blackhole_netdev_xmit(): Dropping skb.
[  826.268603] blackhole_netdev_xmit(): Dropping skb.