Re: [PATCH] mac80211: TDLS: fix skb queue/priority assignment

["Toke Høiland-Jørgensen" <toke@toke.dk>]

Johannes Berg <johannes@sipsolutions.net> writes:

> On Wed, 2018-09-05 at 14:50 +0200, Toke Høiland-Jørgensen wrote:
>
> (uh, sorry, bit late ...)
>
>> > The problem isn't so much how we handle it in mac80211 for the queueing,
>> > but how we deal with things like A-MSDU and how we present it to the
>> > driver ... for iwlwifi at least we'd really like to have only data
>> > frames so we can map it directly to the hardware queue ...
>> 
>> Ah, I see. No, then just putting them at the head of a different TXQ
>> probably won't work...
>> 
>> Are you mapping TXQs to hardware queues dynamically as they empty and
>> re-fill? Presumably you'll have cases where you don't have enough HWQs?
>
> Depends on the hardware. Newer hardware has basically unlimited HWQs
> (something on the order of 512 IIRC).
>
> Older hardware sort of maps them dynamically, but not too dynamic, we
> also have 32 (ish) queues there. We only free them if we need a new one
> and don't have one, and yes, theoretically we can run out and then we
> may have to share a single hardware queue for multiple TXQs, but it
> basically never happens in practice.

Right, gotcha, thanks for the explanation :)

-Toke