Kernel Dump

[Wilkinson, Alex]

    0n Wed, Jun 22, 2005 at 11:23:25PM -0700, Peter Wemm wrote: 

    >I've just rewritten the AMD64 crashdump support to use ELF like ia64.  
    >In fact, I reused most of the ia64 code. We ran into serious problems 
    >at work, first on the amd64 platform and now also the i386 platform.  
    >The problem is that x86 machines are increasinly having memory holes.  
    >The simplistic dump code has no way to skip the memory hole and tries 
    >to dump things like the AGP frame buffer, pci card MMIO space, 
    >PCI-Express configuration space (this means accessing hardware!!) and 
    >so on.

Curious, why is it that x86 creates memory holes in the first place ?

 - aW