[    1.668652] ip (259) used greatest stack depth: 12832 bytes left
[    1.690327] ip (262) used greatest stack depth: 12280 bytes left
[    6.868538] ip (694) used greatest stack depth: 12104 bytes left
[   12.610478] mpls_gso: MPLS GSO support
[  637.281287] ip (9238) used greatest stack depth: 12080 bytes left
[  789.892406] blackhole_netdev_xmit(): Dropping skb.
[  789.892488] blackhole_netdev_xmit(): Dropping skb.
[  789.892545] blackhole_netdev_xmit(): Dropping skb.
[  789.892602] blackhole_netdev_xmit(): Dropping skb.