Re: PROBLEM: kernel BUG at mm/rmap.c:486 - kernel 2.6.15-r1

[Ken MacFerrin <lists@macferrin.com>]

Jesper Juhl wrote:
> On 1/28/06, Ken MacFerrin <lists@macferrin.com> wrote:
>
> > I started getting hard lockups on my desktop PC with the error "kernel
> > BUG at mm/rmap.c:487" starting with kernel 2.6.13 and continuing through
> > 2.6.14.  After switching to 2.6.15 the lockups have continued with the
> > message "kernel BUG at mm/rmap.c:486".
> >
> > The frequency and circumstance are completely random which originally
> > had me suspecting bad memory but after running Memtest86+ for over 12
> > hours without error I'm at a loss.
> >
> > I'm running the binary Nvidia driver so I'll understand if I can't get
> > help here but in searching through the list archives it would seem I'm
> > not alone and I am willing to try any patches that may help diagnose the
> > issue.  The crash happens at least daily and I've seen no difference in
> > running kernels with or without PREEMPT enabled.
>
> If you don't actually *need* accelerated 3D (or if you could do
> without it for a while), switching to the "nv" driver for a few
> days/weeks would be interresting. If the crashes go away that would
> point towards the nvidia driver, if they don't go away we'll get a
> nice untainted crash report.

Thanks to all for the response.  In hopes of helping to isolate this I 
will move back over to the "nv" driver to see if I can recreate the 
problem and get a clean bug report before applying Hugh's patch.

This crash currently happens daily for me so I should be able to test 
this relatively quickly.
-Ken
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