[    2.523157] ip (280) used greatest stack depth: 12360 bytes left
[    2.740754] ip (294) used greatest stack depth: 12344 bytes left
[   14.139428] ip (1175) used greatest stack depth: 12064 bytes left
[   15.515194] mpls_gso: MPLS GSO support
[  735.559485] blackhole_netdev_xmit(): Dropping skb.
[  735.559551] blackhole_netdev_xmit(): Dropping skb.
[  735.559594] blackhole_netdev_xmit(): Dropping skb.
[  735.559631] blackhole_netdev_xmit(): Dropping skb.
[ 1188.551578] blackhole_netdev_xmit(): Dropping skb.
[ 1188.551642] blackhole_netdev_xmit(): Dropping skb.
[ 1188.551676] blackhole_netdev_xmit(): Dropping skb.
[ 1188.551705] blackhole_netdev_xmit(): Dropping skb.