http://bugzilla.kernel.org/show_bug.cgi?id=14445


Robert Moore <[email protected]> changed:

           What    |Removed                     |Added
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             Status|NEW                         |ASSIGNED




--- Comment #1 from Robert Moore <[email protected]>  2009-10-20 21:42:21 
---
This can probably be easily added.

ACPI_SYSMEM_REGION_WINDOW_SIZE is 4K by default. Most operation regions are
smaller than this anyway, so it certainly makes sense to add some intelligence
to the mapping operations. And 4K is the miminum page size AFAIK.

How about this: if the start and end addresses of an operation region fit in a
single page, just map that page. if the region crosses a page boundary, map up
to the first page boundary immediately, then successive pages later as
necessary.

Will this solve the problem?

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