On Wed, Jul 02, 2003 at 02:48:14PM -0700, Martin J. Bligh wrote:
> If you have (anon) object based rmap, I don't see why you want to build
> a pte_chain on a per-page basis - keeping this info on a per linear
> area seems much more efficient. We still have a reverse mapping for
> everything this way.
Eh? This is just suggesting using similar devices as were used in the
anobjrmap patch. I'm not terribly convinced about the remap_file_pages()
extents, since they're only going to be a factor of 8 or so space
reduction.
anobjrmap actually didn't use vma-like devices for anon pages, it merely
chained mm's that could share anon pages (fork()'s between exec()'s)
in a list that could be scanned, tagged anon pages with vaddrs, and
then walks that list of mm's when unmapping or checking referenced bits.
-- wli
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