[    2.182462] ip (253) used greatest stack depth: 12416 bytes left
[    2.838098] ip (284) used greatest stack depth: 12384 bytes left
[    9.747717] ip (689) used greatest stack depth: 12320 bytes left
[   19.004428] mpls_gso: MPLS GSO support
[  912.130931] blackhole_netdev_xmit(): Dropping skb.
[  912.131005] blackhole_netdev_xmit(): Dropping skb.
[  912.131042] blackhole_netdev_xmit(): Dropping skb.
[  912.131083] blackhole_netdev_xmit(): Dropping skb.