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well (not at all) with shortages of the vm_map where the pages are mapped
(usually kmem_map).
Try to deal with it:
- group all information the backend allocator for a pool in a separate
struct. The pool will only have a pointer to that struct.
- change the pool_init API to reflect that.
- link all pools allocating from the same allocator on a linked list.
- Since an allocator is responsible to wait for physical memory it will
only fail (waitok) when it runs out of its backing vm_map, carefully
drain pools using the same allocator so that va space is freed.
(see comments in code for caveats and details).
- change pool_reclaim to return if it actually succeeded to free some
memory, use that information to make draining easier and more efficient.
- get rid of PR_URGENT, noone uses it.
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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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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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- Use malloc/free instead of MALLOC/FREE for variable sized allocations.
- Move the memory inheritance code to sys/mman.h and rename from VM_* to MAP_*
- various cleanups and simplifications.
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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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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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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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- thread_sleep_msg() -> uvm_sleep()
- initialize reference count lock in uvm_anon_{init,add}()
- add uao_flush()
- replace boolean 'islocked' with 'lockflags'
- in uvm_fault() change FALSE to TRUE to in 'wide' fault handling
- get rid of uvm_km_get()
- various bug fixes
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wrapper, so this removes a dependence on the old VM system. From NetBSD.
art@ ok
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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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- 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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Add an extra flag to hashinit telling if it should wait in malloc.
update all calls to hashinit.
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