Re: DWARF2

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On 1/15/07, Erik Mouw <mouw@xxxxxxxxxxxx> wrote:
On Mon, Jan 15, 2007 at 05:13:04PM +0100, Fernando Apestegu?a wrote:
> On 1/15/07, Erik Mouw <mouw@xxxxxxxxxxxx> wrote:
> >On Mon, Jan 15, 2007 at 02:13:29PM +0100, Fernando Apestegu?a wrote:
> >> Today, when I tried to switch down my computer I got this message:
> >> (copied in the next boot from /var/log/messages, so I lost the
> >> traceback, sorry)
> >>
> >> Jan 15 13:24:38 hammer kernel: DWARF2 unwinder stuck at
> >> system_call+0x7e/0x83
> >>
> >> The system finally went down shutting down services as usual.
> >>
> >> The point is that greping my messages file, I found more than 15
> >> occurrences of this.
> >>
> >> What does it mean?
> >
> >It means that the built-in dwarf unwinder couldn't do a full backtrace
> >on Oops or lock validator trap. Shouldn't happen anymore with the
> >latest kernel. If it does, contact lkml.
>
> OK, this is not the latest, but so recent:
>
> 2.6.18-1.2869.fc6
>
> Should I report this?

If Fedora has no newer kernel than 2.6.18, then yes. Otherwise try a
later FC kernel.

Yep, this is the last one. I reported the bug to bugzilla.redhat.com last night.


> BTW, can you point me to a site where I can see what is an "unwinder"?
> (A kernel built-in feature to do backtraces??)

Pff, dunno. It's one of those things that changed on the road to
linux-2.6, I have no idea when it was.

OK, thank you anyway, I'll try to dig into the web again.

Cheers


Erik

--
They're all fools. Don't worry. Darwin may be slow, but he'll
eventually get them. -- Matthew Lammers in alt.sysadmin.recovery


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