On Sun, 4 Jun 2006 20:59:50 -0400
Chuck Ebbert <[email protected]> wrote:
> In-Reply-To: <[email protected]>
>
> On Sun, 04 Jun 2006 21:49:41 +0200, Laurent Riffard wrote:
>
> > > Something strange is happening with the stack. Can you try with 8K stacks?
> > >
> > > kernel hacking --->
> > > [ ] Use 4Kb for kernel stacks instead of 8Kb
> > >
> >
> > Good catch!
>
> Jan Beulich was the one who noticed the stack overflow.
>
> > I just tried with 2.6.17-rc5-mm3. The BUG still happens with 4K stacks,
> > but the system runs fine with 8K stacks.
>
> Can you try -mm3 with "check for stack overflows" and 4k stacks?
Maybe we could modify the check-for-stack-overflows code with 8k stacks to
be "check for overflows which would kill a 4k stack kernel". By decreasing
the thresholds to 3k (say).
> > Another info: the system is able to run fine with the following scenario,
> > even with 4K stack:
> > - boot to runlevel 1
> > - load pktcdvd (modprobe + pktsetup)
> > - then go to runlevel 5
> > It fails if pktcdvd is loaded at runlevel 2 or higher.
>
> I have no idea why that would happen.
I'd be surprised if it has to do with the packet code - more likely someone
screwed something up in the lockdep/genirq/unwind area and the kernel went
recursive.
I tried it here, couldn't reproduce it. Laurent, can you (re?)send the
offending .config?
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