netdev - Re: iwlwifi worse than ever in current git.

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Date:	Tue, 10 Jan 2012 09:54:21 -0800
From:	"Guy, Wey-Yi" <wey-yi.w.guy@...el.com>
To:	emmanuel.grumbach@...el.com
Cc:	Dave Jones <davej@...hat.com>, netdev@...r.kernel.org,
	linux-wireless@...r.kernel.org
Subject: Re: iwlwifi worse than ever in current git.

Emmanuel,

On Tue, 2012-01-10 at 13:49 -0500, Dave Jones wrote:
> For the last few releases, iwlwifi has been getting consistently worse
> wrt reliability for me.  The failure mode has varied, from the chip just
> locking up with no tx/rx of packets with nothing being logged, to
> microcode warnings, and spewing 'Tx aggregation enabled' messages over and over.
> 
> The merge post 3.2 has made these problems a lot worse.  Before, these
> lock-ups were happening once or twice a day. Now they happen several times an hour
> (and after the first one, they seem more frequent). When they happen,
> unloading and reloading the module is the only way for me to get working wireless again.
> They may happen more frequently when the laptop is not idle.
> 
> I did a bisect of the changes since 3.2, which pointed at 76bc10fcd128ad028cf77c62e179cd20dc2ffecf
> as being the culprit, but to be honest I'm not 100% convinced.
> 
> Because every step of the way during the bisect, I saw different failure modes,
> so when I marked something as 'good', it meant "doesn't lock up in the same way",
> even though it may be symptomatic of the same problem.
> 
> The specific chip I'm using is a 5300 in a Dell Adamo, connecting to
> an Apple airport extreme (current model) in N mode.
> 
ANy thought on this, patch 76bc10fcd128ad028cf77c62e179cd20dc2ffecf move
the tid_data to different layer, it shall not have any functional
changes.

Thanks
Wey
> 


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