Re: [PATCH UPDATE] x86: ignore spurious faults

Nick Piggin
2008-01-25T08:48:37Z

On Friday 25 January 2008 19:15, Jan Beulich wrote:
> Actually, another thought: permitting (and handling) spurious faults for
> kernel mappings conflicts with NMI handling, i.e. great care would be
> needed to ensure the NMI path cannot touch any such mapping. So
> even the present Xen/Linux Dom0 implementation may have some
> (perhaps unlikely) problems here, and it would get worse if we added
> e.g. a virtual watchdog NMI (something I am considering, which would
> then extend the problem to DomU-s).

Can you explain how they conflict?

Thanks,
Nick