Re: Oops linux 2.4.23-pre6 on amd64

From: Marcelo Tosatti
Date: Sun Oct 05 2003 - 12:20:02 EST




On 5 Oct 2003, Andi Kleen wrote:

> On Sun, Oct 05, 2003 at 03:29:38PM +0100, Tony Hoyle wrote:
> > Andi Kleen wrote:
> >
> > >To rule out the compiler you can use the compiler/binutils from
> > >
> > >ftp.suse.com:/pub/suse/x86-64/supplementary/CrossTools/8.1-i386/
> > >
> > OK I built with that and here are the results:
> >
> > 1. The ehci-hcd driver fails in exactly the same place.
> > 2. It was still v. unstable, which led me to investigate why (since I'm
> > pretty sure the hardware is good & the suse compiler is supposed to be a
> > good one). I started stripping out options until eventually I found
> > that it's devfs that's the culprit - with that enabled I get random
> > compile errors every few seconds. With it disabled the compile works
> > perfectly, even with the debian compiler (tried -j20 and -j255 and both
> > passed).
>
> Thanks for tracking this down. I would have never noticed
> because I don't use devfs.
>
> Marcelo, any ideas? Do you get broken devfs reports for other
> 64bit architectures too?

Nope, never got such reports.

What problem are you seeing Tony? Oopsing right? Where is the oops output?

> AFAIK devfs is unmaintained and I don't really plan to maintain
> it myself. My proposal is to just disable it in the configuration
> for x86-64 for now.

Nod

>
> > My first guess was you can't use a 32bit devfsd with a 64bit kernel, but
> > stopping devfsd didn't seem to make a whole lot of difference to the
> > stability... only compiling out the entire devfs system solved it.
>
> Very likely the devfs code in the kernel is buggy. It is known
> to be race hell, I wouldn't be surprised if it has 64bit bugs too.

Yes.

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