linux-kernel - Re: iwlagn is getting even worse with 3.3-rc1

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Message-ID: <20120313233900.GE13820@gamma.logic.tuwien.ac.at>
Date:	Wed, 14 Mar 2012 08:39:00 +0900
From:	Norbert Preining <preining@...ic.at>
To:	Emmanuel Grumbach <egrumbach@...il.com>
Cc:	Pekka Enberg <penberg@...nel.org>, linux-kernel@...r.kernel.org,
	ipw3945-devel@...ts.sourceforge.net,
	"Guy, Wey-Yi" <wey-yi.w.guy@...el.com>,
	Johannes Berg <johannes@...solutions.net>,
	"linux-wireless@...r.kernel.org" <linux-wireless@...r.kernel.org>,
	"ilw@...ux.intel.com" <ilw@...ux.intel.com>,
	Dave Jones <davej@...hat.com>
Subject: Re: iwlagn is getting even worse with 3.3-rc1

Hi Emmanuel,

(now at -rc6)

On Mo, 27 Feb 2012, Emmanuel Grumbach wrote:
> > Now I did:
> > kernel 3.3-rc5
> >
> > On Mi, 22 Feb 2012, Emmanuel Grumbach wrote:
> >> From the log, I can see that we have a lot of "passive channel
> >> failures". Can you try to disable 11n (module_parameter) ?
> >> Please also try with debug=0xc0000000
> 
> So this doesn't seem to be related to my rework of the AMPDU logic....
> Will keep you updated if I think about something.

Another thing ... I don't know what the hack is going on here, since
-rc6 I think I get *loads* of messages:
	delba from 00:0a:79:eb:56:10 (initiator) tid 0 reason code 39
After last reboot in about 10min (920.95) I got 414 of these lines.
Always in a triple:
[  914.882870] delba from 00:0a:79:eb:56:10 (initiator) tid 0 reason code 39
[  914.882881] Rx BA session stop requested for 00:0a:79:eb:56:10 tid 0 inititator reason: 0
[  915.012136] Rx A-MPDU request on tid 0 result 0
[  916.157983] delba from 00:0a:79:eb:56:10 (initiator) tid 0 reason code 39
...

No idea if that helps in any way, but it is new.

Interestingly, after doing rfkill block wifi; sleep 10; rfkill unblock wifi,
and that sometimes 2 or three times, at some point these messages disappear
and I have only:
[18876.624068] tx session timer expired on tid 0
[18876.624117] Tx BA session stop requested for 00:0a:79:eb:56:10 tid 0
[18876.644224] Stopping Tx BA session for 00:0a:79:eb:56:10 tid 0
[18877.609764] Open BA session requested for 00:0a:79:eb:56:10 tid 0
[18877.640279] activated addBA response timer on tid 0
[18877.642218] switched off addBA timer for tid 0
[18877.642224] Aggregation is on for tid 0
(again many of them)

Best wishes

Norbert
------------------------------------------------------------------------
Norbert Preining            preining@...ist.ac.jp, logic.at, debian.org}
JAIST, Japan                                 TeX Live & Debian Developer
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