Re: [parisc-linux] c3k panics

From: Joel Soete <soete.joel@tiscali.be>
To: John David Anglin <dave@hiauly1.hia.nrc.ca>
Cc: parisc-linux@lists.parisc-linux.org
Subject: Re: [parisc-linux] c3k panics
Date: Sun, 29 May 2005 10:32:16 +0000	[thread overview]
Message-ID: <42999A30.6070602@tiscali.be> (raw)
In-Reply-To: <200505290141.j4T1ffhI006449@hiauly1.hia.nrc.ca>

John David Anglin wrote:
> I can panic my c3750 very consistently running the binutils testsuite
> (cvs source as of 20050526).
mmm the experimental debian bintuils-2.16 seems to works fine for me (kernel 2.6.8.1-pa11 32bit on a b180).

> I've tried many of the default kernels
> to see if I could isolate when the problem was introduced.  The last
> kernel that seems unaffected is 2.6.8.1-pa11.  The problem is present
> in 2.6.12-rc5-pa0 and 2.6.11-pa4.
> 
I observe the same differences of behaviour.

Btw, that looks like the pb I encountered many times when I tried CONFIG_DEBUG_SLAB=y?

As I tried to explain in detail (<http://lists.parisc-linux.org/pipermail/parisc-linux/2005-May/026493.html>) there is a big pb with 
this option. Unfortunately, I am not a C programer and so lake of deep knowledges to suggest a proper fix :-(

If it's your case too, can you try without this option.
(or give a try to this patch attempt: <http://lists.parisc-linux.org/pipermail/parisc-linux/2005-May/026474.html>.
it's not perfect but it helps me anyway :-) ).

> The sad part is that panic is also broken and no error messages are
> produced when the fault occurs.  Before adding panic=180 to the command
> line, pressing TOC just yielded a register dump for panic itself.  That's
> not too useful.  In my testing, the last working panic dump was with
> 2.6.9-pa1 which faulted with a HPMC during boot.
> 

The same for me, it seems that the pb appears during 2.6.9 developement;
as far as I can test, it seems that the pb appears between 2.6.9-rc2-pa2 and pa5;
For my part I already tried to revert only this pa5 (just to be sure) 
<http://lists.parisc-linux.org/pipermail/parisc-linux-cvs/2004-September/034576.html>
but it doesn't help :-)

So still have to revert few thing (but it would be hard like fixup stuff) to try to isolate the pb?

Ah still a question: is it the same pb for 32bit and 64bit twin kernel?

Thanks,
	Joel
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