[    2.044638] ip (259) used greatest stack depth: 12376 bytes left
[    2.721677] ip (290) used greatest stack depth: 12344 bytes left
[   12.330336] ip (1116) used greatest stack depth: 12288 bytes left
[   12.521324] ip (1130) used greatest stack depth: 12064 bytes left
[   14.885329] mpls_gso: MPLS GSO support
[ 1213.798631] blackhole_netdev_xmit(): Dropping skb.
[ 1213.798708] blackhole_netdev_xmit(): Dropping skb.
[ 1213.798743] blackhole_netdev_xmit(): Dropping skb.
[ 1213.798782] blackhole_netdev_xmit(): Dropping skb.