[    1.923083] ip (256) used greatest stack depth: 12376 bytes left
[    2.529449] ip (290) used greatest stack depth: 12360 bytes left
[    2.577135] ip (294) used greatest stack depth: 12344 bytes left
[   15.651255] mpls_gso: MPLS GSO support
[  633.756187] ip (27476) used greatest stack depth: 12328 bytes left
[ 1121.540602] blackhole_netdev_xmit(): Dropping skb.
[ 1121.540672] blackhole_netdev_xmit(): Dropping skb.
[ 1121.540705] blackhole_netdev_xmit(): Dropping skb.
[ 1121.540739] blackhole_netdev_xmit(): Dropping skb.