debugging frequent kernel panics on 8.2-RELEASE

[Rick Macklem]

Steven Hartland wrote:
> ----- Original Message -----
> From: "Andriy Gapon" <avg at FreeBSD.org>
> 
> >>> I would really appreciate if you could try to reproduce the
> >>> problem with the patch that I sent earlier.
> >>
> >> Hi Andriy, what's the risk of this patch causing other issues?
> >
> > I can not estimate.
> > The code is supposed to affect only things that happen after panic,
> > so make your guess.
> 
> So in theory should be good.
> 
> >> I ask as to get results from this we've going to have to roll it
> >> out to over 130+ production machines, so I'd like to be clear on
> >> the risks before I sign that off.
> >
> > I will be happy if you try the patch on a single machine
> > provided the problem is that reproducible.
> 
> Unfortunately although its happening a lot its taking the
> large numbers of machines to make it that way.
> 
> Over the 130+ machines we're seeing between 3 and 8 panics
> a day, so based on that we could be waiting quite some time
> for a specific machine to panic :(
> 
> Don't think we're going to make any progress on this in the current
> state so I think we'll give it a shot.
> 
Just a random thought that is probably not relevent, but...
Is it possible that some change for the upgrade is making the machines
run hotter and they're failing when they overhead?

rick
> Regards
> Steve
> 
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