Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison overwritten

Ingo Molnar
2008-07-21T14:02:04Z

* Evgeniy Polyakov <johnpol@2ka.mipt.ru> wrote:

> On Mon, Jul 21, 2008 at 01:55:55PM +0200, Ingo Molnar (mingo@elte.hu) wrote:
> > > > I could try run tests with netconsole deactivated, if you think
> > > > that's a worthwile line of probing this problem. (although that
> > > > would make me do blind tests in essence - having kernel log output
> > > > is really essential.)
> > >
> > > Let's try this way first. If system will continue to crash, we will
> > > add some debug options in various pathes. Existing reports do not
> > > contain enough information unfortunately, so we will not lose too
> > > much.
> >
> > ok. I've turned off netconsole - 8 successful bootups in a row so far.
> > The box is a slow booter/builder with an 8 kernels/hour test throughput,
> > so if everything goes fine we should have meaningful results in about 10
> > hours.
> >
> > ( there are other, faster testboxes in -tip testing with 33 kernels/hour
> > build+boot throughput where we'd have to wait only 2 hours - but as
> > per Murphy's law they dont trigger this bug ;-)
>
> Since 2.6.25 there was only single change in netpoll.c:
> f5184d267c1aedb9b7a8cc44e08ff6b8d382c3b5
> Which looks innocent.
>
> Is your driver e1000 or e1000e? Can you check different one?

i cannot check e1000 anymore due to this upstream commit:

| d03157babed7424f5391af43200593768ce69c9a is first bad commit
| commit d03157babed7424f5391af43200593768ce69c9a
| Author: Auke Kok <auke-jan.h.kok@intel.com>
| Date: Sun Jun 22 15:21:29 2008 -0700
|
| e1000: remove PCI Express device IDs
|
| We do not want to prolong the situation much longer that e1000
| and e1000e support these devices at the same time. As a result,
| take out the bandage that was added for the interim period
| and remove all the PCI Express device IDs from e1000.

but yes, this box was using e1000 for a long time, and recently migrated
to e1000e. I'm not sure there's any connection, do you think there is?

Ingo