linux-kernel - Re: [PATCH] iwlegacy: print how long queue was actually stuck

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Date:	Mon, 02 Jul 2012 11:32:43 +0200
From:	Paul Bolle <pebolle@...cali.nl>
To:	Stanislaw Gruszka <sgruszka@...hat.com>
Cc:	"John W. Linville" <linville@...driver.com>,
	linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] iwlegacy: print how long queue was actually stuck

On Mon, 2012-07-02 at 11:06 +0200, Stanislaw Gruszka wrote:
> On Sat, Jun 30, 2012 at 03:20:06PM +0200, Paul Bolle wrote:
> For some reason we are not able to authenticate, what itself is a
> problem. Maybe this is wrong key offset problem and that will
> be fixed by Emmanuel patch.

Which I can only try if we fix the small problem you mentioned in your
comment on Emmanuel's patch (reference
<20120702082653.GA2479@...hat.com>, not yet archived on lkml.org), can't
I?

> Regarding "Queue 2 stuck", there is another fix in iwlwifi that
> did not make to iwlegacy, which perhaps could help. If not here
> then maybe on suspend.  
> 
> commit 342bbf3fee2fa9a18147e74b2e3c4229a4564912
> Author: Johannes Berg <johannes.berg@...el.com>
> Date:   Sun Mar 4 08:50:46 2012 -0800
> 
>     iwlwifi: always monitor for stuck queues
> 
> I'm attaching iwlegacy version of it.

Thanks, I'll try it. The explanation of the iwlwifi commit makes a lot
of sense: it seems to match the events found in the logs of this laptop.
That's encouraging. Should I report whether the iwlegacy version works
or not?

> > 2) It's always "Queue 2" that's stuck. What does that queue do?
> 
> It's TX queue, probably one used for default traffic i.e. for Best
> Effort category (others are Video, Voice and Background).

I see.

Any thoughts on my patch (ie, the patch that is actually the subject of
this thread?


Paul Bolle

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