[    2.028790] ip (258) used greatest stack depth: 12288 bytes left
[    2.574671] ip (292) used greatest stack depth: 12272 bytes left
[   16.102586] mpls_gso: MPLS GSO support
[   17.021020] ip (1457) used greatest stack depth: 12248 bytes left
[  649.826330] ip (9203) used greatest stack depth: 12240 bytes left
[  690.885737] blackhole_netdev_xmit(): Dropping skb.
[  690.885810] blackhole_netdev_xmit(): Dropping skb.
[  690.885854] blackhole_netdev_xmit(): Dropping skb.
[  690.885893] blackhole_netdev_xmit(): Dropping skb.