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1. When checking if the pagedaemon should be awakened and to see how
much work it should do, consider the buffer cache deficit
(how much pages the buffer cache can eat max vs. how much it has
now) as pages that are not free. They are actually still usable by
the allocator, but the presure on the pagedaemon is increased when
we starting to chew into the memory that the buffer cache wants to
use.
2. Remove the stupid 512kB limit of how much memory should be our
free target. That maybe made sense on 68k, but on modern systems
512k is just a joke. Keep it at 3% of physical memory just like
it was meant to be.
3. When doing allocations for the pagedaemon, always let it use the
reserve. the whole UVM_OBJ_IS_KERN_OBJECT is silly and doesn't
work in most cases anyway. We still don't have a reserve for
the pagedaemon in the km_page allocator, but this seems to help
enough. (yes, there are still bad cases in that code and the comment
is only half-true, the whole section needs a massage, but that will
happen later, this diff only touches pagedaemon parts)
Testing by many, prodded by theo.
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and supposed to be only used from within ddb.
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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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ckuethe@ for a while. Okay beck@, "it is good timing" deraadt@.
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sys/sched.h and use that to check if there's something to do.
kettenis@ thib@ ok
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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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kmem_object) just so that we can remove them, just use pmap_extract
to get the pages to free and simplify a lot of code to not deal with
the list of intrsafe maps, intrsafe objects, etc.
miod@ ok
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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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no change for normal code
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miod@ ok
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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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as freepages being vconverted back to byte address make sure to
perform calculations in (upcoming) larger paddr_t to avoid losing
higher bits in calculation.
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pgfree check into pglist; no functional change for normal kernels; make histories uncommon
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no change in compiler assembly output.
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all architectures but arm, where it is needed.
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pdhist one until ubc gaets back. art@ ok
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Diff generated by Chris Kuethe.
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instead of the pa. Most callers already had it handy and those who didn't
only called it for managed pages and were outside time-critical code.
This will allow us to make those functions clean and fast on sparc and
sparc64 letting us to avoid unnecessary cache flushes.
deraadt@ miod@ drahn@ ok.
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vm_page.
From NetBSD.
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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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so that we can get back the old behavior where a vnode with cached data
is less likely to be recycled than a vnode without cached data.
XXX - This is a brute-force solution - we do it where uvmexp.vnodepages
are changed, I am not really sure it is correct but people have been
very happy with the diff so far and want this in the tree.
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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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been converted to bus_dma ages ago, but since noone haven't bothered to do that
I haven't bothered to do more than to test that the kernel still builds
with those changes.
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Contains also support for page coloring.
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uvm_loan.
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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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- 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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amount of kmem_map on machines with lots of physical memory.
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