Re: About SECTION_SIZE_BITS for Sparsemem

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On Tue, Jul 13, 2010 at 10:28:52AM +0100, Mel Gorman wrote:
> I like this idea. It would allow memmap_valid_within to be thrown away
> altogether and it maintains the assumptions of the memory model and
> sounds "cheap".

It can't work.  We map kernel memory with 1MB sections, not pages.
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