[    2.085051] ip (294) used greatest stack depth: 12232 bytes left
[   12.620863] mpls_gso: MPLS GSO support
[  633.632600] ip (31060) used greatest stack depth: 12088 bytes left
[  748.115829] blackhole_netdev_xmit(): Dropping skb.
[  748.115900] blackhole_netdev_xmit(): Dropping skb.
[  748.115952] blackhole_netdev_xmit(): Dropping skb.
[  748.115986] blackhole_netdev_xmit(): Dropping skb.