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The vm hackers don't use it, don't maintain it and have to look at it all the
time. About time this 800 lines of code hit /dev/null.
``never liked it'' tedu@. ariane@ was very happy when i told her i wrote
this diff.
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page so that um_anfree will free it for us.
uvm_anfree does a pmap_page_protect(, VM_PROT_NONE) just before it frees the
page, so we don't need to do it here ourselves.
ok ariane@
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(uvm_atopg) and use it in uvm_km_doputpage to replace some handrolled
code. Shrinks the kernel a trivial amount.
ok beck@ and miod@ (who suggested i name it uvm_atopg not uvm_atop)
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myself" panics that some people have seen over the last year-and-a-half.
Cherry picked from a more complex (and therefore scarier) diff from oga@.
ok tedu@, oga@
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else.
ok thib@
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for use by the uvm pseg code. this is the path of least resistance until
we sort out how many of these functions we really need. problem found by mikeb
ok kettenis oga
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This has has been tested very very thoroughly on all archs we have
excepting 88k and 68k. Please see cvs log for the individual commit
messages.
ok beck@, thib@
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More backouts in line with previous ones, this appears to bring us back to a
stable condition.
A machine forced to 64mb of ram cycled 10GB through swap with this diff
and is still running as I type this. Other tests by ariane@ and thib@
also seem to show that it's alright.
ok deraadt@, thib@, ariane@
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This is for the same reason as the earlier backouts, to avoid the bug
either added or exposed sometime around c2k9. This *should* be the last
one.
prompted by deraadt@
ok ariane@
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similar to the aobj.c changes, this one does vnodes. Vnodes are more
complex because they actaully have to sync to backing store. So firstly,
convert sync to sleep instead of setting released.
Now, for backing store, in the PGO_FREE case, if we set PG_RELEASED
*before* an async io, (nothing else will see it, the page is busy), then
we can ignore the page after the io is done. We could do something
similar for PGO_DEACTIVATE too, but that is another change. On error we
just clear the released flag, nothing else sets it for uobj pages other
than aiodoned.
ok thib@, beck@, ariane@
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sleep on them (and otherwise ignore them) sleep on the pointer to the
{aiodoned,pagedaemon}_proc members, and nuke the two extra words.
"no objections" art@, ok beck@.
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the simple lock with a real lock - a IPL_BIO mutex. While i'm here, make
the sleeping condition one hell of a lot simpler in the aio daemon.
some ideas from and ok art@.
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By pseudo-inline, I mean that if a certain macro was defined, they would
be inlined. However, no architecture defines that, and none has for a
very very long time. Therefore mainly this just makes the code a damned
sight easier to read. Some k&r -> ansi declarations while I'm in there.
"just commit it" art@. ok weingart@.
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K&R function declarations, so switch them all over to ansi-style, in
accordance with the prophesy.
"go for it" art@
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Ok: miod, tedu
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ok miod@, art@
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fixed size array which size should match any buf; if a bogus buf is passed
to this function, the kernel will KASSERT instead of potentially running out
of stack and having an undefined behaviour.
ok deraadt@
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type of all variables to daddr64_t. this includes the APIs for XXsize()
and XXdump(), all range checks inside bio drivers, internal variables
for disklabel handling, and even uvm's swap offsets. re-read numerous
times by otto, miod, krw, thib to look for errors
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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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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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eyeballed by miod@ and pedro@
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no change for normal code
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miod@ ok
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- Use it to skip device mappings while dumping core.
- Ignore EFAULT errors while dumping core since they can happen
even for valid mappings. Just skip that part of the core file and
let it get automagically zero-filled.
This fixes the broken X core dumps that people have been seeing and also
fixes some other potential problems that could prevent core dumps (mmaps
beyond EOF, etc.).
tedu@ ok
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pages a process uses. this is now the userland "data size" value.
ok art deraadt tdeval. thanks testers.
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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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uvm_unmap, uvm_deallocate and a few other functions.
Simplifies some code and reduces diff to the UBC branch.
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splassert(IPL_BIO) in all known callers, just to make sure).
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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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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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Prevents panics caused by vnodes being recycled under our feet.
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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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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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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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idea from deraadt@ via NetBSD
millert@ ok
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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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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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