Source: linux
Source-Version: 4.18~rc3-1~exp1

On Thu, May 19, 2016 at 09:12:46PM +0200, Mirek Kratochvil wrote:
> Package: src:linux
> Version: 4.5.1-1
> Severity: normal
> Tags: upstream
> 
> Dear Maintainer,
> 
> When attaching a codel or fq_codel qdisc to a leaf hfsc class, sometimes a
> bunch of warnings (dmesg attached) show up. That would not be a problem, but
> the warnings seem to be triggered for each packet for some time, and as a side
> situation the processing renders the system more or less unresponsive for
> several seconds (which may be a problem for QoS machine).
> 
> A bug that is probably related (but concerning hfsc+sfq) is #631945 , my
> configuration is mostly the same, except with codel instead of SFQ. No similar
> fix exists for codel.
> 
> When trying to rule out the causes, I found that the amount of traffic doesn't
> matter (the machine is currently processing around 1Gbit/s). fq_codel shows 
> the
> same behavior, no other qdisc I tested causes the warnings.
> 
> I hope someone could point out what's wrong with codel, if I see the cause I
> can write/send a patch to upstream.

This issue appears to have been fixed in 4.18-rc3 upstream. Closing
accordingly.

Regards,
Salvatore

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