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Re: mac80211: changing number of queues in ops->start

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On Tue, 2009-04-07 at 21:33 +0200, Michael Buesch wrote:

> > Well, I suppose you could register with the max and later reduce and
> > stop the remaining queues you're not using... Or not stop them and drop
> > packets on them. That's somewhat fragile, gives people who look at tc a
> > wrong idea, and I can't imagine supporting it, but it should work.
> 
> mkay, I'll try this. thanks :)
> 
> I wonder, however, will mac80211 try to queue packets on queues that are stopped?
> And I think just dropping them is not an option, because this will cause breakage.
> 
> What about just queueing everything on a single queue, no matter what queue mac80211
> puts the frame into? Would this cause ordering issues?
> Or the other way around, is there anything that _depends_ on the higher priority queues
> to get sent before the higher priority queues?

mac80211 won't try to select a queue higher than hw->queues at
select_queue time, so it shouldn't try to put packets onto that queue,
look in wme.c.

johannes

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