Re: 2.6.17-rc5-mm3

[Andrew Morton]

On Mon, 5 Jun 2006 15:48:45 -0400
Dave Jones <davej@xxxxxxxxxx> wrote:

> On Sat, Jun 03, 2006 at 11:20:04PM -0700, Andrew Morton wrote:
>  > 
>  > ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.17-rc5/2.6.17-rc5-mm3/
>  > 
>  > - Lots of PCI and USB updates
>  > 
>  > - The various lock validator, stack backtracing and IRQ management problems
>  >   are converging, but we're not quite there yet.
> 
> Thought I'd try my bi-annual "poke at -mm". Results were less
> than spectacular.
> 
> http://www.codemonkey.org.uk/junk/DSC00347.JPG
> First the sound driver oopsed.

That's a bug in sound/pci/cs4281.c.

There's a debug patch in -mm
ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.17-rc5/2.6.17-rc5-mm3/broken-out/debug-shared-irqs.patch
which trips up drivers which request an IRQ before their IRQ handler is
ready to accept IRQs (they'll crash in real life if the IRQ is shared).

> Then, the whole thing locked up after probing the parallel port.
> I disabled it in the BIOS, and then it locked up probing the floppy drive..
> http://www.codemonkey.org.uk/junk/DSC00348.JPG

That looks like the same thing?

> System is still alive, and responds to keyboard, but makes no forward progress.
> 
> (sysrq-B spewed a lockdep trace and then rebooted. I'll try and get
> that hooked up to a serial console)
> 
> On a whim, I enabled the floppy drive in the BIOS, and rebooted.
> That got me here. http://www.codemonkey.org.uk/junk/DSC00349.JPG
> Same dead userspace.

So does that.

> Off to find a serial cable.

Try reverting debug-shared-irqs.patch, or disable the sound driver?
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