[    2.626203] ip (281) used greatest stack depth: 12128 bytes left
[   16.706567] mpls_gso: MPLS GSO support
[  640.422208] ip (27318) used greatest stack depth: 12056 bytes left
[  701.043380] blackhole_netdev_xmit(): Dropping skb.
[  701.043446] blackhole_netdev_xmit(): Dropping skb.
[  701.043481] blackhole_netdev_xmit(): Dropping skb.
[  701.043519] blackhole_netdev_xmit(): Dropping skb.