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uvm_tree_sanity is left as debugging help but needs to be enabled manually.
okay art@
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before uvm_km_init (alpha). Don't uvm_map 0 space, it gives very strange
breakage on alpha.
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map_findspace is still broken on alpha. this will make debugging easier.
okay millert@
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the tree triggers the bug, PMAP_PREFER case was broken also.
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tree to find free space between entries. speeds up memory allocation,
etc...
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from Chuck Silvers; okay art@
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We allocate map entries for the non-intrsafe kernel map (most notably
kernel_map and exec_map) from a pool that's backed by kmem_map (to avoid
deadlocking).
This should get rid of MAX_KMAPENT panics.
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time around; my fix was very similiar to netbsd, take netbsd fix; okay art@
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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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a while. With his words:
" here is a fix for a bug in amap_wiperange (was posted on netbsd's
tech-kern list). i screwed up the loop control :("
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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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ok art@
(manual page update coming soon)
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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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Note that VOP_PUTPAGES has the same problems, but the fix will be more
complicated.
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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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Prevents panics caused by vnodes being recycled under our feet.
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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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While in the area, convert nfs node allocation from malloc to pool and do
some cleanups.
Based on the UBC changes in NetBSD. niklas@ ok.
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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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(Look ma, I might have broken the tree)
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instead of doing fork1, cpu_set_kpc. This lets us retire cpu_set_kpc and
avoid a multiprocessor race.
This commit breaks vax because it doesn't look like any other arch, someone
working on vax might want to look at this and try to adapt the code to be
more like the rest of the world.
Idea and uvm parts from NetBSD.
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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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