[    2.062921] ip (246) used greatest stack depth: 12568 bytes left
[    2.103926] ip (249) used greatest stack depth: 12376 bytes left
[    2.779744] ip (280) used greatest stack depth: 12344 bytes left
[   17.619069] mpls_gso: MPLS GSO support
[  636.804897] ip (24834) used greatest stack depth: 12192 bytes left
[  685.424283] blackhole_netdev_xmit(): Dropping skb.
[  685.424345] blackhole_netdev_xmit(): Dropping skb.
[  685.424375] blackhole_netdev_xmit(): Dropping skb.
[  685.424400] blackhole_netdev_xmit(): Dropping skb.
[ 1015.241837] blackhole_netdev_xmit(): Dropping skb.
[ 1015.241915] blackhole_netdev_xmit(): Dropping skb.
[ 1015.241955] blackhole_netdev_xmit(): Dropping skb.
[ 1015.241993] blackhole_netdev_xmit(): Dropping skb.