Re: 2.6.39: crash w/threadirqs option enabled

[Justin Piszcz]

On Fri, 20 May 2011, Thomas Gleixner wrote:

> 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 ?
> >
> > Hi,
> >
> > 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.
>
> Thanks,
>
> 	tglx

Hi,

Crashed again and it rebooted too:

reboot   system boot  2.6.39             Thu Jun  9 23:58 - 04:05  (04:06) 
user1      pts/0        X                Thu Jun  9 19:25 - 19:30  (00:04)
user1      pts/10       X                Thu Jun  9 18:23 - crash  (05:35)

Any thoughts on what could be causing this?
Should I go back to 2.6.38?

Justin.

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