On Fri, 2 Aug 2002, David Mosberger wrote:
>
> The Rice people avoided some of the fragmentation problems by
> pro-actively allocating a max-order physical page, even when only a
> (small) virtual page was being mapped.
This probably works ok if
- the superpages are only slightly smaller than the smaller page
- superpages are a nice optimization.
> And since superpages quickly become
> counter-productive in tight-memory situations anyhow, this seems like
> a very reasonable approach.
Ehh.. The only people who are _really_ asking for the superpages want
almost nothing _but_ superpages. They are willing to use 80% of all memory
for just superpages.
Yes, it's Oracle etc, and the whole point for these users is to avoid
having any OS memory allocation for these areas.
Linus
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This archive was generated by hypermail 2b29 : Wed Aug 07 2002 - 22:00:21 EST