[    2.167629] ip (248) used greatest stack depth: 12376 bytes left
[    2.875341] ip (282) used greatest stack depth: 12360 bytes left
[    6.738247] ip (445) used greatest stack depth: 12344 bytes left
[   16.914175] mpls_gso: MPLS GSO support
[  738.010759] blackhole_netdev_xmit(): Dropping skb.
[  738.010824] blackhole_netdev_xmit(): Dropping skb.
[  738.010862] blackhole_netdev_xmit(): Dropping skb.
[  738.010897] blackhole_netdev_xmit(): Dropping skb.