Re: 2.6.39: crash w/threadirqs option enabled
From: Thomas Gleixner
Date: Fri May 20 2011 - 12:22:41 EST
On Fri, 20 May 2011, Justin Piszcz wrote:
> On Fri, 20 May 2011, Thomas Gleixner wrote:
> > On Fri, 20 May 2011, Justin Piszcz wrote:
> > > On Fri, 20 May 2011, Thomas Gleixner wrote:
> > > > Does it crash right away or just when doing something particular?
> > > It crashed at 2100, this is when I run a few I/O intensive processes:
> > > - backup (dump ext4 filesystem -> to a separate raid device)
> > > - backup (dump ext4 on remote host -> to separate raid device)
> > > - backup (dump xfs on remote host -> to separate raid device)
> > >
> > > This looks like it is what caused it to crash.
> > That narrows it down somewhat, but does not give us a clue at all :(
> > > > Is the box fully dead after the crash ?
> > > The host was online and I went away for awhile, when I came back the
> > > system
> > > had rebooted on its own (as I lost all of my X windows/etc).
> > Hmm. Did you have panic_timeout set ?
> No, I do not use panic_timeout or any type of watchdog that would reboot
> the system upon a lockup/crash.
Yuck, that means it ran into a triple fault. Nasty. I have no idea how
to debug that at the moment and I was not able to reproduce on one of
my test systems. Maybe I need to try harder.
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