FYI, we noticed the below changes on

https://github.com/0day-ci/linux John-Fastabend/drop-the-qdisc-lock-for-pfifo_fast-mq/20151231-015853
commit 9dc0990f12fb6ba8e32a63578aa060408958595a ("net: sched: pfifo_fast new option to deque multiple pkts")

With your commit, there is the following new message in kernel log.
Please take a look at the attached dmesg for details.

[   87.658006] IP-Config: Reopening network devices...

Thanks,
Ying Huang