[    1.919387] ip (246) used greatest stack depth: 12376 bytes left
[    2.515486] ip (280) used greatest stack depth: 12344 bytes left
[    8.061130] ip (665) used greatest stack depth: 12304 bytes left
[   15.000839] mpls_gso: MPLS GSO support
[  633.949433] ip (20012) used greatest stack depth: 12192 bytes left
[  807.553599] blackhole_netdev_xmit(): Dropping skb.
[  807.553689] blackhole_netdev_xmit(): Dropping skb.
[  807.553758] blackhole_netdev_xmit(): Dropping skb.
[  807.553829] blackhole_netdev_xmit(): Dropping skb.