Re: [RFC v2 2/4] mac80211: Add airtime accounting and scheduling to TXQs

[Johannes Berg <johannes@sipsolutions.net>]

On Mon, 2018-07-09 at 18:37 +0200, Toke Høiland-Jørgensen wrote:
> 
> @@ -427,6 +428,8 @@ struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
>  	sta->cparams.interval = MS2TIME(100);
>  	sta->cparams.ecn = true;
>  
> +	sta->airtime.weight = 1;

Perhaps it might be useful to start with a higher default (even
something like 1<<8) as that would allow adjusting up/down single
stations, without having to adjust all stations and listening to new
additions to adjust them quickly etc?

Theoretically this doesn't really matter, but from a practical POV it
may be easier to leave them all at the default and just adjust the ones
that need adjustment for some reason.

> ieee80211_sta_register_airtime

Do we really need this? We already have at least TX status with airtime,
for ieee80211_sta_tx_notify() and friends, and the station pointer in
that context, so couldn't we piggy-back on this? At least WMM-AC already
requires the driver to provide this.

johannes