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    SubjectRe: PCI memory allocation bug with CONFIG_HIGHMEM
    On Wed, Jan 07, 2004 at 05:55:57AM +0000, Dave Jones wrote:
    > On Wed, Jan 07, 2004 at 06:02:56AM +0100, Andi Kleen wrote:
    > > > > 5.) Look into other ways of finding out if the PnPBIOS might be buggy,
    > > > > currently we only have DMI.
    > > > > Any others?
    > > > We could use the exception mechanism, and try to fix up any BIOS errors.
    > > > That would require:
    > >
    > > [...] It would not work for x86-64 unfortunately where you cannot do
    > > any BIOS calls after the system is running (it would only be possible
    > > early in boot)
    >
    > Why on earth would you want to call PNPBIOS on AMD64 anyway ?

    See the preceding thread. We're currently missing a reliable way to find
    free IO space for PCI resources, which is needed for some cases. The
    PNPBIOS was discussed as one of the possible solutions.

    For AMD64 clearly something ACPI based is needed though.

    -Andi
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