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Re: Reboots?


From: Marcus Brinkmann
Subject: Re: Reboots?
Date: Wed, 28 Mar 2001 23:37:54 +0200
User-agent: Mutt/1.3.15i

On Wed, Mar 28, 2001 at 04:28:28PM -0500, Roland McGrath wrote:
> > Yeah, did that. it entered gdb all right, and gdb switched to the crashing
> > thread (10 of 19). When I left gdb it crashed with "panic: thread_invoke",
> 
> Exciting!

Wonderful.

> I suspect that is some kernel bug having to do with wired threads.
> Can you get the kernel backtrace?

I wouldn't know how to get it, so I don't know if I can. What do I need for
this?

> You might try commenting out the code in
> proc that wires things for the proc you run in the sub-hurd.

Which would be?

2000-03-13  Roland McGrath  <roland@baalperazim.frob.com>

        Don't call cthread_wire; it's a no-op in GNU anyway.

If it isn't "wire" I am looking for, I don't know what I am looking for (a
grep showed nothing in proc/).

> > and so I lost my log, but it went like this:
> 
> That looks like there was a bad jump, or a stack clobberation that resulted
> in one (i.e. clobbering saved pc/fp on the stack and then returning).
>
> You might do some hack in the demuxer or something that sets a global
> variable indicating the last RPC that was being handled.  Then you might
> get an idea what code is running just before the crash.

I think I know how to do this, so I will try this first.

Sometimes I wonder if the kernel ring buffer proposed by RMS wouldn't be
helpful in situations like this.

Thanks,
Marcus

-- 
`Rhubarb is no Egyptian god.' Debian http://www.debian.org brinkmd@debian.org
Marcus Brinkmann              GNU    http://www.gnu.org    marcus@gnu.org
Marcus.Brinkmann@ruhr-uni-bochum.de
http://www.marcus-brinkmann.de



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