Re: [Xen-devel] segfault in VM

[Derek Glidden <dglidden@xxxxxxxxxxxxxxx>]

On Jul 19, 2004, at 3:27 AM, Keir Fraser wrote:

> Clearly there's some fairly random memory corruption going on, which
> then causes segfaults (if the corruption hits code pages) and
> filesystem corruption (if the corruption hits buffer-cache pages).
>
> The "Bailing: not a -ve offset" and "GPF (0004):" messages are almost
> certainly just symptoms of executing a corrupted block of code. i.e.,
> the bug has already triggered some time ago - probably corrupted a
> page of glibc or the kernel.
>
> It would be interesting to see whether or not this is SMP-related.
> It's also interesting that someone said they couldn't reproduce
> corruption when using 2.6.7 for the non-privileged guest OSes.
I'll be building Xen on a non-SMP box I also have at home tonight, with 
any luck.
I'll also be running memtest on the SMP box that's been seeing the 
corruption when I get home as well, probably followed by CTCS.  It was 
stable for a week or so under reasonably heavy load before I installed 
Xen on it, but you never know...
If it passes all the testing, I'll build a 2.6.7 guest kernel and give 
that a try.
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