From: David Mosberger <email@example.com>
Date: Mon, 5 Aug 2002 22:01:16 -0700
In my opinion, this is perhaps the strongest argument *for* a separate
"giant page" syscall interface. It will be very hard (perhaps
impossible) to optimize superpages to work efficiently when the ratio
of superpage/basepage grows huge (as, by definition, the kernel would
manage them as a set of basepages).
Actually, this is one of the reasons there was a lot of research into
using sub-page clustering for large mappings in the TLB. Basically
how this worked is that for a superpage, you could stick multiple
sub-mappings into the entry such that you didn't need a fully
physically contiguous superpage.
It's talked about in one of the Talluri papers.
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