[    2.456402] ip (281) used greatest stack depth: 12344 bytes left
[   11.343252] ip (951) used greatest stack depth: 12288 bytes left
[   15.989572] mpls_gso: MPLS GSO support
[  774.625730] blackhole_netdev_xmit(): Dropping skb.
[  774.625795] blackhole_netdev_xmit(): Dropping skb.
[  774.625828] blackhole_netdev_xmit(): Dropping skb.
[  774.625858] blackhole_netdev_xmit(): Dropping skb.