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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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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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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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int (*d_mmap) __P((dev_t, int, int));
to:
paddr_t (*d_mmap) __P((dev_t, off_t, int));
This allows us to mmap devices past 4GB offsets.
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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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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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Original commit message:
Patch from chuq for uvm r/w map oscillation bug.
Fixes the XalphaNetBSD slowdown.
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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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