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pdhist one until ubc gaets back. art@ ok
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uvm_unmap, uvm_deallocate and a few other functions.
Simplifies some code and reduces diff to the UBC branch.
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splassert(IPL_BIO) in all known callers, just to make sure).
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This unbreaks m68k m88k sparc and perhaps others, which eventually froze
when hitting swap.
Tested by various people on various platforms.
ok art@
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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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Today we add a pmap argument to pmap_update() and allocate map entries for
kernel_map from kmem_map instead of using the static entries. This should
get rid of MAX_KMAPENT panics. Also some uvm_loan problems are fixed.
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Prevents panics caused by vnodes being recycled under our feet.
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Contains also support for page coloring.
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This time we're getting rid of KERN_* and VM_PAGER_* error codes and
use errnos instead.
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code is written mostly by Chuck Silvers <chuq@chuq.com>/<chs@netbsd.org>.
Tested for the past few weeks by many developers, should be in a pretty stable
state, but will require optimizations and additional cleanups.
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UBC, but prerequsites for it.
- Create a daemon that processes async I/O (swap and paging in the future)
requests that need processing in process context and that were processed
in the pagedaemon before.
- Convert some ugly ifdef DIAGNOSTIC code to less intrusive KASSERTs.
- misc other cleanups.
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for the virtual address.
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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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idea from deraadt@ via NetBSD
millert@ ok
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Including support for zeroing pages in the idle loop (not enabled yet).
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into objects.
Gives the possibilty to mmap beyond the size of vaddr_t.
From NetBSD.
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Improve error handling on I/O errors to swap.
From NetBSD
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and arbitrary flags into one argument.
One new flag is PMAP_CANFAIL that tells pmap_enter that it can fail if there
are not enough resources to satisfy the request. If this flag is not passed,
pmap_enter should panic as it should have done before this change (XXX - many
pmaps are still not doing that).
Only i386 and alpha implement CANFAIL for now.
Includes uvm updates from NetBSD.
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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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boolean_t pmap_extract(struct pmap *, vaddr_t, paddr_t *).
Matches NetBSD. Tested by various people on various platforms.
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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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the access type that caused this mapping. This is to simplify pmaps
with mod/ref emulation (none for the moment) and in some cases speed
up pmap_is_{referenced,modified}.
At the same time, clean up some mappings that had too high protection.
XXX - the access type is incorrect in old vm, it's only used by uvm and MD code.
The actual use of this in pmap_enter implementations is not in this commit.
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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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