[Make-wifi-fast] mesh deployment with ath9k driver changes

[Valent Turkovic]

Hi Pete,
I'm betting that you are running into a classic issue of not enough
airtime to do all you want, and then you get into death-spiral of
frame re-transmission (symptom you see are high ping times) and then
whole network collapses.

Get someone who has wifi analysis tools to take a snapshot of your
airtime and watch for number of re-transmitted frames (or get that
info from ath9 driver statistics). If you see more than 5% of frame
re-transmissions you are having noticeable issues, if you see more
than 15% of frame re-transmissions your network is probably not
usable.

Hope this helps,
Valent.