On 5 Jul 2002, Eric W. Biederman wrote: > You get spaces, but you don't exactly get useful red-zones, unless the > hardware also raises exceptions when you write to unmapped memory, (A > tricky thing to do). With a virtual page in between the archtecture > gives you an exception on accesses to unmapped addresses.
I think you should get an error on memory accesses if no device responds to the PCI FRAME# signal. I/O is different, but I do believe memory causes a fault when you address something that is not there. Or am I wrong on this? ron
