[    2.427671] ip (280) used greatest stack depth: 12344 bytes left
[   16.047823] mpls_gso: MPLS GSO support
[  637.912498] ip (17786) used greatest stack depth: 12120 bytes left
[  893.036491] blackhole_netdev_xmit(): Dropping skb.
[  893.036577] blackhole_netdev_xmit(): Dropping skb.
[  893.036630] blackhole_netdev_xmit(): Dropping skb.
[  893.036683] blackhole_netdev_xmit(): Dropping skb.