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Date: Wed, 31 Aug 2011 16:47:57 +0200
From: Felix Fietkau <nbd@openwrt.org>
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To: Helmut Schaa <helmut.schaa@googlemail.com>
CC: Johannes Berg <johannes@sipsolutions.net>,
	linux-wireless@vger.kernel.org, linville@tuxdriver.com
Subject: Re: [PATCH] mac80211: retry sending failed BAR frames later instead
 of tearing down aggr
References: <1314558661-28454-1-git-send-email-nbd@openwrt.org> <1314792948.4161.23.camel@jlt3.sipsolutions.net> <CAGXE3d-_hSmii3GsZF3jqOfP1amrMeL+GtJ605z406nRjA_z7g@mail.gmail.com>
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On 2011-08-31 2:31 PM, Helmut Schaa wrote:
> On Wed, Aug 31, 2011 at 2:15 PM, Johannes Berg
> <johannes@sipsolutions.net>  wrote:
>>  On Sun, 2011-08-28 at 21:11 +0200, Felix Fietkau wrote:
>>>  Unfortunately failed BAR tx attempts happen more frequently than I
>>>  expected, and the resulting aggregation teardowns cause performance
>>>  issues, as the aggregation session does not always get re-established
>>>  properly.
>
> Felix, so this also happens with ath9k (not only rt2800pci)?
Right. I think it can happen with any driver if the client goes into 
powersave during heavy traffic.

- Felix