Re: Kernel Dump

From: Wilkinson, Alex (alex.wilkinson_at_dsto.defence.gov.au)
Date: 06/23/05

  • Next message: Wilkinson, Alex: "Re: Kernel Dump" 
    Date: Thu, 23 Jun 2005 17:14:53 +0930
To: Peter Wemm <peter@wemm.org>

        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
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