Re: Dom0 PAE panic when starting xend

[Christoph Egger <Christoph_Egger%gmx.de@localhost>]

On Tuesday 10 March 2009 17:04:27 Manuel Bouyer wrote:
> On Tue, Mar 10, 2009 at 04:30:13PM +0100, Jean-Yves Migeon wrote:
> > Reading xsd_kva code around its mmap routine (xenevtmmap() in
> > arch/xen/xen/xenevt.c), it is using x86_btop which casts away to
> > unsigned long, which could be wrong with PAE (paddr_t being unsigned
> > long long).
>
> Good catch; x86_btop() needs to be fixed as it could break other
> things. For the problem to show up you need to have 4G or more RAM though
> (which might also explain why it doesn't cause problems for some).
>
> The problem is that x86_btop() is used for both physical and virtual
> addresses, which doesn't fit very well PAE. Maybe just casting to paddr_t
> would be good enough ...

My machine has exactly 4GB RAM.

Christoph