tree eef727dc2cd11610488711f554e3aca14257f38a
parent c6a7eafb58bf3912659bb7e85feaa3e4f476b244
author Avery Pennarun <apenwarr@gmail.com> 1455644864 -0500
committer Avery Pennarun <apenwarr@gmail.com> 1455650649 -0500

mac80211: add a debugfs var for the default aggregation timeout.

Since around the beginning of time, ath9k aggregates have timed out after
5000 TU (around 5000ms) of inactivity, but nobody seems to be quite sure
why, and this magic number seems to have migrated around from one place to
another.  An openbsd mailing list recently had a patch to disable the
timeout completely, which they say matches some commercial routers:
https://www.mail-archive.com/tech@openbsd.org/msg29456.html

Even in Linux, several non-ath9k drivers default to no timeout already.  I
think changing it directly to zero would be safe, but to allow a more
structured investigation, I want to make it configurable for now.

I confirmed that setting it to 500ms increases the incidence of b/23786055,
and setting it to 0 seems to make it go away (so far).

Change-Id: I2027e14a5be67eda79c9d46a1fdead19fced9740