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a new etype, UVM_ET_HOLE, meaning it has no backend.
UVM_ET_HOLE entries (which should be created as UVM_PROT_NONE and with
UVM_FLAG_NOMERGE and UVM_FLAG_HOLE) are skipped in uvm_unmap_remove(), so
that pmap_{k,}remove() is not called on the entry.
This is intended to save time, and behave better, on pmaps with MMU holes
at process exit time.
ok art@, kettenis@ provided feedback as well.
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ifdef netbsd block in drm code, but oga@ says he'll remove
it soon...
OK art@, oga@;
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ckuethe@ for a while. Okay beck@, "it is good timing" deraadt@.
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us did not see it or get a chance to test it before it was commited. It
broke cvs, in the ami driver, making it not succeed at seeing it's devices.
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this results in lesse kva waste due to static preallocation of those
for every phys page and also every swap page.
tested by beck krw miod
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pgfree check into pglist; no functional change for normal kernels; make histories uncommon
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pdhist one until ubc gaets back. art@ ok
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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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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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Including support for zeroing pages in the idle loop (not enabled yet).
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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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1GB i386 machines needs this. The fix is heavily based on Jason Thorpe's
found in NetBSD. Here is his original commit message:
Instead of checking vm_physmem[<physseg>].pgs to determine if
uvm_page_init() has completed, add a boolean uvm.page_init_done,
and test against that. Use this same boolean (rather than
pmap_initialized) in pmap_growkernel() to determine if we are
being called via uvm_page_init() to grow the kernel address space.
This fixes a problem on some i386 configurations where pmap_init()
itself was needing to have the kernel page table grown, and since
pmap_initialized was not yet set to TRUE, pmap_growkernel() was
choosing the wrong code path.
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with a 'make build'. From NetBSD. art@ ok
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break swap paritions into sections, each section has own
encryption key. if a section's key becomes unreferenced, erase it.
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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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