Re: [Bug #11264] Invalid op opcode in kernel/workqueue

Dave Jones
2008-10-07T16:56:47Z

On Wed, Oct 08, 2008 at 02:23:03AM +1100, Nick Piggin wrote:
> On Sunday 05 October 2008 04:32, Rafael J. Wysocki wrote:
> > This message has been generated automatically as a part of a report
> > of recent regressions.
> >
> > The following bug entry is on the current list of known regressions
> > from 2.6.26. Please verify if it still should be listed and let me know
> > (either way).
> >
> >
> > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=11264
> > Subject : Invalid op opcode in kernel/workqueue
> > Submitter : Jean-Luc Coulon <jean.luc.coulon@gmail.com>
> > Date : 2008-08-07 04:18 (59 days old)
>
> Any progress being made with this one? Dave, Oleg did some pretty
> nice looking debugging work that indicates it might be a cpufreq
> problem. Have you had a chance to look at the comments in the
> bugzilla? Or have you been cc'ed on patches for this?

I'm not convinced that the original report wasn't hardware related.
We had taken a machine check exception already, which shows that something
isn't quite right. MCEs happening under high load are usually a sign
of thermal/power problems of some sort.

Oleg's comments may still hold true, independant of the report.
I've added Venki to the Cc: as he's recently rewritten considerable
amounts of the ondemand governor (though the workqueue mechanics
are pretty much the same).

Dave

--