linux-kernel - Re: [ipw3945-devel] hang on 2.6.33-rc4

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Date:	Thu, 21 Jan 2010 10:18:54 -0800
From:	John Ranson <ranson@...lager.net>
To:	Norbert Preining <preining@...ic.at>
Cc:	Zhu Yi <yi.zhu@...el.com>,
	Johannes Berg <johannes@...solutions.net>,
	"Chatre, Reinette" <reinette.chatre@...el.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"ipw3945-devel@...ts.sourceforge.net" 
	<ipw3945-devel@...ts.sourceforge.net>
Subject: Re: [ipw3945-devel] hang on 2.6.33-rc4

Do you have a point and shoot camera that can shoot video? I've used
one in the past to capture debug info that scrolls by too quickly.

John

On Wed, Jan 20, 2010 at 4:28 PM, Norbert Preining <preining@...ic.at> wrote:
> Dear all,
>
> On Mi, 20 Jan 2010, Zhu Yi wrote:
>> Looks like this this is the BUG_ON in skb_pull. Please try if this patch
>> help? BTW, are you using swiotlb?
>
> On Mi, 20 Jan 2010, Johannes Berg wrote:
>> > # CONFIG_FRAME_POINTER is not set
>>
>> The stacktrace would be a lot more useful with it set, yes. Other than
>> that, I don't know. If there's a way to make your display resolution
>> higher that might be useful so more info fits on the screen, or maybe
>> trimming the stack trace depth (though I don't know if that's possible,
>> I do know it is on powerpc because I added it there but not sure on x86)
>>
>> All assuming you can reproduce this issue, of course.
>
>
> @Zhu: the patch didn't help. I patched it into the kernel plus activated
> CONFIG_FRAME_POINTER which led to the same hang (not surprisingly, the
> patch does only debug more ;-)
>
> This time unfortunately I there was too much output to actually capture it.
>
> @Johannes: 100% reproducible. Everytime I boot into 33-rc4 and ssh into
> any remote place it goes boom. 100%.
>
> Maybe another tidbig might help: With 2.6.32.3 it happens that I have
> hickups with WLAN:
> [  996.514491] iwlagn 0000:06:00.0: iwl_tx_agg_start on ra = 00:24:c4:ab:bb:42 tid = 0
> and the connections needs 10-20secs (hard to guess) until it is
> back alive.
>
> Best wishes
>
> Norbert
> ------------------------------------------------------------------------
> Norbert Preining            preining@...ist.ac.jp, logic.at, debian.org}
> JAIST, Japan            TU Wien, Austria           Debian TeX Task Force
> DSA: 0x09C5B094   fp: 14DF 2E6C 0307 BE6D AD76  A9C0 D2BF 4AA3 09C5 B094
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