[Make-wifi-fast] tx queue stuck for many minutes

[Toke Høiland-Jørgensen]

Joshua Zhao <swzhao at gmail.com> writes:

> Hi,
> I run into a weird symptom that occasionally the aqm tx queue can get stuck
> for quite long time (maybe around 30min).  What happened is that we're
> sending a low bandwidth UDP traffic from the host to multiple peers over a
> WiFi radio simultaneously. We're running opensource mac80211 + ath10k
> driver. Very occasionally when there are temporary issues causing trouble
> on the host sending to one of the peers, the queue to all peers can get
> stuck and stay stuck for quite long (even though the link trouble had been
> gone or TX had been stopped). Only after quite a while, then the queue
> cleans up.

This sorta sounds like a driver bug where the queue doesn't get
restarted after the issue is resolved? I'd suggest you email the ath10k
(ath10k at lists.infradead.org - maybe cc linux-wireless at vger.kernel.org
and this list) with a description of the issue that triggers this bug,
as well as system details (hardware model, firmware version and kernel
version).

-Toke