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into objects.
Gives the possibilty to mmap beyond the size of vaddr_t.
From NetBSD.
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The highlight is some more advices to madvise(2).
o MADV_DONTNEED will deactive the pages in the given range giving a quicker
reuse.
o MADV_FREE will garbage-collect the pages and swap resources causing the
next fault to either page in new pages from backing store (mapped vnode)
or allocate new zero-fill pages (anonymous mapping).
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From NetBSD.
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Implements mincore(2), mlockall(2) and munlockall(2). mlockall and munlockall
are disabled for the moment.
The rest is mostly cosmetic.
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- Introduce a new type of map that are interrupt safe and never allow faults
in them. mb_map and kmem_map are made intrsafe.
- Add "access protection" to uvm_vslock (to be passed down to uvm_fault and
later to pmap_enter).
- madvise(2) now works.
- various cleanups.
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<chuck@openbsd.org>. This code is as of yet disabled on all platforms,
actually not yet supported on more than mvme68k, although other
platforms are expected soon, as code is already available.
This code makes handling of multiple physical memory regions
consistent over all platforms, as well as keeping the performance of
maintaining a single continuous memory chunk. It is also a
requirement for the upcoming UVM replacement VM system.
What I did in this merge: just declared the pmap_map function in a
MD include file per port that needs it. It's not an exported pmap
interface, says Chuck. It ended up in differnt include files on
differnet ports, as I tried to follow the current policy on a per-arch
basis.
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