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

From: reinette chatre
Date: Tue Jan 19 2010 - 12:01:34 EST

Hi Norbert,

On Mon, 2010-01-18 at 21:47 -0800, Norbert Preining wrote:
> On Fr, 15 Jan 2010, reinette chatre wrote:
> > > I am having repeatable complete hard lockups on my laptop with 2.6.33-rc4.
> > > works fine.
> > >
> > > I believe that it is related to the network, because sometimes I can
> > > actually log in (gnomes session) and as soon as I do some network
> > > related suddenly hard hang, not even Sysrq working anymore.
> > >
> > > Interestingly it only happens at a specific AP where the ESSID is
> > > hidden (at work). At home I can work without any problems (ESSID not
> > > hidden).
> > >
> > > Unfortunately I cannot set up a serial console or similar.
> >
> > Does that mean no netconsole either? Does anything show up in the logs?
> > Is it easy to reproduce? If so, perhaps you can have increased debug at
> > that time and hopefully something will be captured in the logs when the
> > problem occurs.
> Ok, I can confirm that setting up the network is not the problem, nor
> is it pinging other hosts. But ssh-ing into another server
> made it go boom. From the screenshot I attach it looks like something
> in TCP code (that explains why it does not happen in pings), below
> I see tcp_data_snd_check
> I managed to swithc in time to a console with tail -f syslog before
> it hard locked up. The log files are empty, but I got a screenshot photo
> which has some hopefully useful information. I cannot scroll up or down
> anymore ...
> If you want me to create a bug report or you create one in bugzilla,
> I can also upload it htere, but I attach it for now.

I see that it fails in skb_pull after being called from one of the RX
handlers. Let's add Johannes.

Johannes, does anything perhaps look familiar to you in this trace?

Thank you


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