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SubjectRe: [2.1.98] - It compiled and I ran...
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> 1. Find biggest free block within DMA availible range.
> 2. Move memory from either side out of the way, like up high in the
> memory space where ISA DMA can't happen.


kwr@kwr.hnv.com said:
> "Move" is the stumbling block here. You don't know what memory
> regions (forgot the structure names already *sigh*) use a given
> physical address unless you exhaustively check every PTE of every
> memory region in every process. Plus the buffer cache.

Plus device drivers. Some pci device may have a pointer to that memory
there. In other words, it might not be in any kernel tables at all.

--
Steve Williams "The woods are lovely, dark and deep.
steve@icarus.com But I have promises to keep,
steve@picturel.com and lines to code before I sleep,
http://www.picturel.com And lines to code before I sleep."



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