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    SubjectRe: option memmap
    On Wed, 11 Jan 2006 15:48:29 +0100 Reinhold Jordan wrote:

    > Hello,
    >
    > is there any documentation for this option better than this in
    > linux/Documentation/kernel-parameters.txt ?
    >
    > I have a laptop with a defect memory soldered on the main-board.
    > 128KB of 128MB are defect started at 7936KB
    >
    > As I read from kernel-parameters.txt the option
    > memmap=128K$7936K
    > reserve this area. But this seems to be simply ignored. Even, if I
    > fade out 64MB, Knoppix still create a RAM disk, which is larger
    > as the remaining memory...
    >
    > Does someone know advice?

    Please give the complete list of kernel boot options that
    you used.

    Documentation/kernel-parameters.txt does say (for IA-32)
    to use mem= and memmap= together in some cases.

    And there are some comments in the source code
    (arch/i386/kernel/setup.c) but they probably don't help
    any more than the Doc file does:

    * "mem=XXX[kKmM]" defines a memory region from HIGH_MEM
    * to <mem>, overriding the bios size.
    * "memmap=XXX[KkmM]@XXX[KkmM]" defines a memory region from
    * <start> to <start>+<mem>, overriding the bios size.


    ---
    ~Randy
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