[    2.074114] ip (263) used greatest stack depth: 12416 bytes left
[    2.661326] ip (294) used greatest stack depth: 12384 bytes left
[    6.316872] ip (484) used greatest stack depth: 12320 bytes left
[   15.723056] mpls_gso: MPLS GSO support
[  632.283722] ip (17434) used greatest stack depth: 12256 bytes left
[  942.192663] blackhole_netdev_xmit(): Dropping skb.
[  942.192718] blackhole_netdev_xmit(): Dropping skb.
[  942.192749] blackhole_netdev_xmit(): Dropping skb.
[  942.192777] blackhole_netdev_xmit(): Dropping skb.
[ 1047.151546] blackhole_netdev_xmit(): Dropping skb.
[ 1047.151620] blackhole_netdev_xmit(): Dropping skb.
[ 1047.151657] blackhole_netdev_xmit(): Dropping skb.
[ 1047.151698] blackhole_netdev_xmit(): Dropping skb.