> > We can let oracle shared memory segments use 4 MB pages,
> > but still use the normal page cache code to look up the
> > pages.
>
> That has some potential big wins beyond oracle. Some of the big number
> crunching algorithms also benefit heavily from 4Mb pages even when you
> try and minimise tlb misses.
Note that I'm not sure whether the complexity of using
4 MB pages is worth it or not ... I just like the fact
that the radix tree page cache gives us the opportunity
to easily implement and try it.
I like radix trees for making our design more flexible
and opening doors to possible new functionality.
It could even be a CONFIG option for the embedded folks,
if we can keep the code isolated enough ;)
cheers,
Rik
--
"Linux holds advantages over the single-vendor commercial OS"
-- Microsoft's "Competing with Linux" document
http://www.surriel.com/ http://distro.conectiva.com/
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