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Re: Xen 3.3: Problem HVM guest

On Thursday 14 August 2008 19:05:08 Manuel Bouyer wrote:
> On Thu, Aug 14, 2008 at 06:57:15PM +0200, Christoph Egger wrote:
> > > OK, so 0x9c1ff167 is really the complete pte value. This would make it
> > > point to a physical address at 2497MB. Do you have that much memory in
> > > this box ?
> >
> > Yes. It has 4GB.
> OK, so we have a valid pte entry, pointing to valid memory, for the
> affected VA; yet writing to the VA seems to cause a fault. The only
> remaining issue I can see is that we would be updating the wrong pmap.
> but I can't see how it could happen for this case, and not for the
> other IOCTL_PRIVCMD_MMAP users ...

The machine is a Dual-Core CPU machine. Since NetBSD/Xen (= Dom0)
utilizes only the BSP due to lack of SMP support, it is very likely the
guest utilizes the other CPU core.
Does this help?


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