On 10/3/07, Dave Hansen <[email protected]> wrote:
> > Not quite. Count can never go below the number of reserved pages plus
> > pages allocated to MAP_PRIVATE mappings. That number is computed by:
> > (resv + (total - free)).
>
> So, (total - free) equals the number of MAP_PRIVATE pages? Does that
> imply that all reserved pages are shared and that all shared pages are
> reserved?
no, not quite. In-use huge page (total - free) can be both private or
shared. resv_huge_pages counts number of pages that is committed for
shared mapping, but not yet faulted in.
What the equation does essentially is: resv_huge_pages + nr-huge-pages-in-use.
- Ken
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