Subject: Re: Performance comparision / qdisc / no qdisc / queueing linux kernel 4.12

From: Stephen Hemminger <[email-masked]>
Date: Fri, 11 Aug 2017 16:16:06 -0700

Any of the current qdisc that do rate control are single threaded.
Since bandwidth is a shared resource, the qdisc has to acquire a lock
and update cache shared data structures.

Don't expect HTB or HFSC to be free.

> 
> 4.13-rc3 have kernel panic when deleting qdisc - will try to get panic trace

Please do.