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Re: [PATCH v2 08/12] ath9k: fix aggregate size limit based on queue TXOP limit

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On 2012-07-17 1:35 PM, Sujith Manoharan wrote:
> Felix Fietkau wrote:
>> The way I understand this, the TXOP limit is meant to limit the duration
>> of a single transmission on the channel. An aggregate is transmitted in
>> one go, there's no SIFS or extra PHY headers inbetween, just short
>> delimiters. So an A-MPDU should be treated pretty much like an MPDU
>> here, its transmission duration should not exceed the TXOP limit.
> 
> Yeah, makes sense.
> 
> But we need to handle multiple interfaces, otherwise this would break
> modes like P2P. For example, bring up a P2P-GO and setup a HT20 network,
> and then bring up a new station interface - this would unconditionally
> update the aggr. limits of the existing network. This wasn't the case earlier
> since the limits were being maintained globally and were common to all interfaces
> and addition/removal of new interfaces would not change the aggr. limits.
Before my patch, the aggr limits were always broken for the VI queue.
Now they're just sometimes broken :)

- Felix
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