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a suitable range and ran out of memory segments. Oops.
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with, trying to find free pages matching the callers requirement.
However, on systems with noncontiguous memory and large gaps between
segments, this is a disaster as soon as one of these gaps is hit.
Rewrite the logic by iterating on the physsegs, and the on the intersection
of the physseg range and the callers range. This also frees us from having
to check whether a given page range crosses a physseg.
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Not sure what's more surprising: how long it took for NetBSD to
catch up to the rest of the BSDs (including UCB), or the amount of
code that NetBSD has claimed for itself without attributing to the
actual authors.
OK deraadt@
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macros that just expand into the mutex functions
to keep the abstraction, do assorted cleanup.
ok miod@,art@
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to separate locking, on most modern machines this is not enough
since operations on short types touch other short types that share the
same word in memory.
Merge pg_flags and pqflags again and now use atomic operations to change
the flags. Also bump wire_count to an int and pg_version might go
int as well, just for alignment.
tested by many, many. ok miod@
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to "pg_flags" and "pg_version", so that they are a bit easier to work with.
Whoever uses generic names like this for a popular struct obviously doesn't
read much code.
Most architectures compile and there are no functionality changes.
deraadt@ ok ("if something fails to compile, we fix that by hand")
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ok dim@
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most agp_generic_bind_memory failures when memory is limited and very
fragmented.
In effect, this should fix a lot of X startup crashes after
activities that exercise memory a lot (e.g. make builds, building big
ports, etc).
ok mickey, miod
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will prevent panics in, e.g., bus_dmamem_alloc().
ok jason@ art@
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pgfree check into pglist; no functional change for normal kernels; make histories uncommon
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pages into the queue already containing allocated pages.
breaks i386:setup_buffers() because of this.
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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 only thing left in vm/ are just dumb wrappers.
vm/vm.h includes uvm/uvm_extern.h
vm/pmap.h includes uvm/uvm_pmap.h
vm/vm_page.h includes uvm/uvm_page.h
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Including support for zeroing pages in the idle loop (not enabled yet).
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wrapper, so this removes a dependence on the old VM system. From NetBSD.
art@ ok
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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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Mostly cleanups, but also a few improvements to pagedaemon for better
handling of low memory and/or low swap conditions.
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