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machines or some configurations or in some phase of the moon (we actually
don't know when or why) files disappeared. Since we've not been able to
track down the problem in two weeks intense debugging and we need -current
to be stable, back out everything to a state it had before UBC.
We apologise for the inconvenience.
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Contains also support for page coloring.
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The archs that didn't have a proper PMAP_NEW now have a dummy implementation
with wrappers around the old functions.
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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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This is to match (make diffs smaller) the code in NetBSD.
new gcc inlines those functions, so this could also be a performance win.
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Mostly cleanups, but also a few improvements to pagedaemon for better
handling of low memory and/or low swap conditions.
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