[    1.883557] ip (248) used greatest stack depth: 12376 bytes left
[    2.449368] ip (279) used greatest stack depth: 12360 bytes left
[    2.494902] ip (283) used greatest stack depth: 12344 bytes left
[   15.044533] mpls_gso: MPLS GSO support
[  636.592160] ip (24501) used greatest stack depth: 12328 bytes left
[ 1067.553596] blackhole_netdev_xmit(): Dropping skb.
[ 1067.553667] blackhole_netdev_xmit(): Dropping skb.
[ 1067.553697] blackhole_netdev_xmit(): Dropping skb.
[ 1067.553723] blackhole_netdev_xmit(): Dropping skb.