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    SubjectRe: Prefered method to map PCI memory into userspace.
    "David S. Miller" <> writes:

    > On 27 Sep 2003 00:03:42 +0200
    > Andi Kleen <> wrote:
    >> mmap on /dev/mem
    >> PIO cannot be done on memory, for that you have to use iopl()
    >> or ioperm() to get access to the port and then issue the PIO
    >> instructions yourself
    > Platform dependant, mmap on /dev/mem doesn't work on many systems.

    Just curious - what does the X server use on these many systems then ?

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