Re: Random server crashes every few weeks (smp_invltlb: endless loop […] retrysmp_invltlb: ipi sent)

[Matthew Dillon]

Indefinite wait buffer typically means the disk driver locked up while the
system was trying to swap to/from it.  Two questions:  (1) Is the swap
encrypted ?  And (2) What is the device attachment for the swap drive (in
the dmesg output).

-Matt

On Mon, Aug 8, 2016 at 5:18 AM, Stefan Unterweger <
232.20711 at chiffre.aleturo.com> wrote:

> Und täglich grüßt das Murmeltier… :o/
>
>
> Another crash with 09b0c4f76, but this one looks different.  The console
> was scrolling endless streams of lines like this one:
>
> | swap_pager: indefinite wait buffer:  bp 0xffffffe00e57bea8 offset:
> 4133535744, size: 4096
>
> With varying values for both ‚bp‘ and ‚offset‘.  No kernel panic,
> though.
>
> The system was swapping when it happened; I was toying with the dports
> git repository.  I have seen a crash like this once before, but this was
> months ago.  Is this related, or something new altogether?
>
> Reboot went without any problems, so -that- problem really does seem to
> be resolved.
>
>     Stefan
>
>
> * Stefan Unterweger on Sun, Aug 07, 2016 at 02:49:31AM +0200:
> > I stalled the update a bit because I wanted to make sure that the boot
> > problems were resolved first (our customers are already edgy; another
> > two-hour downtime just for booting would have been too much).
> >
> > Given that 4.6 is now out, I’ve decided to take the plunge and do it.
> > Booting went without a fault (could be coincidence; I will see if the
> > problem is gone next time when I’ll re-add more storage), initial quick
> > stress tests went rather well.  As far as I can tell, I/O performance
> > has approximately doubled.
> >
> > I have scheduled a few heavy stress tests for the upcoming weekend where
> > I will try to torture the system with everything I got, then I’ll report
> > back.
> >
> > Once again: Thanks BIG time for all the wonderful work that all of you
> > have put into Dragonfly, I really enjoy working with it.
> >
> > Cheers,
> >     Stefan
>
> > * Matthew Dillon on Tue, Jul 26, 2016 at 06:03:03PM -0700:
> > > On this issue, we've made a bunch of fixes in just the last few days,
> you
> > > will definitely want to update to the latest master.  Things are
> looking a
> > > lot more stable now.  We are continuing to life test three server
> > > configurations this week to locate any remaining low-hanging fruit.
> > >
> > > -Matt
>
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