Re: Uptime again?

[Manfred Spraul]

From: "Hartmut Holz" <[e-mail]>
> Rik van Riel wrote:
> >
> > The fact that lavrec crashes the machine while Xawtv works
> > suggests a device driver may be corrupting memory somewhere.
> >
>
> I got a debug patch from Manfred Spraul to debug slab.c.

poisoning of fields of 'struct page', slab poisoning, even of objects with constructors.
Same patch as:
http://groups.google.com/groups?selm=linux.kernel.3C3B6F65.F9226437%40colorfullife.com&rnum=1

> With this patch
> the machine ran for about 3 hours. No problem. I looked into slab.c and had an
> idea. What about just one CPU. So I built a new Kernel with just one CPU.
> Result: 1 CPU 1 Minute - 2 CPU 20 Minutes. I aspected a different result.
> In my opinion the whole thing has something to do with slab, SMP and threads.
>
Not with slab itself, probably with a slab user. Someone uses a stale pointer.

What do you means with one cpu? Did you boot a SMP kernel with "nosmp" on the command line, or did you make a kernel without
CONFIG_SMP?

--
    Manfred