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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