panic in netisr (I think) + DUMP FAILED (ERROR 6)
Ruslan Ermilov
ru at freebsd.org
Fri Aug 14 15:01:41 UTC 2009
On Fri, Aug 14, 2009 at 03:47:16PM +0200, Ian FREISLICH wrote:
> Ruslan Ermilov wrote:
> > On Fri, Aug 14, 2009 at 10:47:05AM +0200, Ian FREISLICH wrote:
> > > Do you have any idea why kernel dumps are not working as shown in
> > > the OP?
> > >
> > There was a message, "Attempt to write outside dump device boundaries.",
> > that explains that. Search the mailing list archives where I explained
> > the underlying bug with current versions of FreeBSD (in short page maps
> > get updated while we're writing a dump, due to interrupts still enabled).
>
> And then, this bug is probably why my dumps have been unusable since
> about 12 months now? These (2) servers have a continuous interrupt
> rate in excess of 40k/s, network related, so interrupts during
> dumping are highly likely. Reading that thread I'm given to believe
> that the problem exists only for mini-dumps. I've had crashes
> without cores with (and without) mini-dumps enabled, but I've only
> recently started capturing console output, so I'll see what happens
> on its next crash. They reliably crash at least once a week.
>
True: only on SMP and only with minidumps enabled.
Cheers,
--
Ruslan Ermilov
ru at FreeBSD.org
FreeBSD committer
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