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I have an application I'm building which requires OS support to allow
a user-space function to fill a page on page-faults. Ideally, I
could reserve a chunk of address space but not back it with memory,
and then on fault my handler would serve out data from some small
cache of user-managed physical pages.
My google-fu has been weak in finding such a system-level API in any
OS. Has this got a name I should be searching on? I can't believe
no-one has implemented user-level page replacement.
Thanks,
Paul
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