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From: Johannes Berg <johannes@sipsolutions.net>
To: Kan Yan <kyan@google.com>
Cc: linux-wireless@vger.kernel.org, make-wifi-fast@lists.bufferbloat.net, 
 toke@redhat.com, nbd@nbd.name, yiboz@codeaurora.org, john@phrozen.org, 
 lorenzo@kernel.org, rmanohar@codeaurora.org, kevinhayes@google.com
Date: Fri, 22 Nov 2019 13:12:37 +0100
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Subject: Re: [Make-wifi-fast] [PATCH v11 2/4] mac80211: Import airtime
 calculation code from mt76
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On Mon, 2019-11-18 at 22:06 -0800, Kan Yan wrote:
> From: Toke Høiland-Jørgensen <toke@redhat.com>
> 
> Felix recently added code to calculate airtime of packets to the mt76
> driver. Import this into mac80211 so we can use it for airtime queue limit
> calculations.
> 
> The airtime.c file is copied verbatim from the mt76 driver, and adjusted to
> be usable in mac80211. This involves:
> 
> - Switching to mac80211 data structures.
> - Adding support for 160 MHz channels and HE mode.
> - Moving the symbol and duration calculations around a bit to avoid
>   rounding with the higher rates and longer symbol times used for HE rates.

:)

I'll apply this, I guess, but I do wonder to what extent it overlaps
with cfg80211_calculate_bitrate()?

johannes