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don't need to be married.
ok guenther miod beck jsing kettenis
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won't be pulling in the uvm side of the kitchen.
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this inside #ifdef _KERNEL in any case, so nothing really changes.
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wakeup and clearing the PG_BUSY and PG_WANTED flags, so try to keep those
bits as close together and defenitely avoid calling random code in between.
ok guenther@, tedu@
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ok guenther
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Move all legacy MAP_FOO values behind #ifndef _KERNEL and redefine
them to either be aliases for existing flags (e.g., MAP_COPY ->
MAP_PRIVATE) or 0.
Also, add MAP_OLDFOO defines (behind #ifndef _KERNEL) so the kernel
and kdump can remain compatible with current OpenBSD binaries.
ok deraadt
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was empty then the first page allocation should sleep until it can get one.
ok tedu@
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This provides a way for a process to designate pages in its address
space that should be replaced by fresh, zero-initialized anonymous
memory in forked child processes, rather than being copied or shared.
ok jmc, kettenis, tedu, deraadt; positive feedback from many more
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to the process's vmspace and filedescs. struct proc continues to
keep copies of the pointers, copying them on fork, clearing them
on exit, and (for vmspace) refreshing on exec.
Also, make uvm_swapout_threads() thread aware, eliminating p_swtime
in kernel.
particular testing by ajacoutot@ and sebastia@
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an offset/size/address by shifting by PAGE_SHIFT. Make uvm_objwrire/unwire
use voff_t instead of off_t. The former is the right type here even if it is
equivalent to the latter.
Inspired by a somewhat similar changes in Bitrig.
ok deraadt@, guenther@
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pulled by <uvm/uvm_extern.h> and turn uvm_total() into a private
function.
The preferred way to get memory stats is through the VM_UVMEXP
sysctl(3) since VM_METER is just a wrapper on top of it. In the
kernel, use `uvmexp' directly instead of uvm_total().
This change does not remove <sys/vmmeter.h> from <uvm/uvm_extern.h>
to give some more time to port maintainers to fix their ports.
ok guenther@ as part of a larger diff.
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uvm_uarea_alloc()
function name from NetBSD; arm testing by miod@
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change. From Pedro Martelletto via bitrig.
ok beck@, krw@
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a remove-and-insert-all-items approach for now and remove the comments that
suggest manipulating list pointers. Pointed out by Pedro Martelletto.
ok beck@, krw@, mikeb@
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ok beck@, miod@
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emphatic ok usual suspects, grudging ok miod
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on the written buffers. Use the flag for writes from the page daemon to
ensure that we free buffers written out by the page daemon rather than
caching them.
ok kettenis@
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in uvm_pmr_rootupdate(). Issue spotted and fix provided by Kieran Devlin.
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reaper from hogging the cpu. it will do the kernel lock twiddle trick to
allow other CPUs a chance to run, and also checks if the reaper has been
running for an entire timeslice and should be preempted.
ok deraadt
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which is the default, unless the fault call is explicitly used to wire a given
page.
The amount of pages being faulted in was borrowed from the FreeBSD VM code,
about 15 years ago, at a time FreeBSD was only reliably running on 4KB page
size systems.
It is questionable whether faulting the same amount of pages, on platforms
where the page size is larger, is a good idea, as it may cause too much I/O.
Add an uvmfault_init() routine, which will compute the proper number of pages
at runtime, depending upon the actual page size, and attempting to fault in
the same overall size the previous code would have done with 4KB pages.
ok tedu@
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the pmap_update() to the end of the loop, rather than after each loop
iteration - which might not even end up invoking pmap_enter()!
Quiet blessing from guenther@ deraadt@
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<uvm/uvm.h> if possible and remove double inclusions.
ok beck@, mlarkin@, deraadt@
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Tweak the handling of ktrace EMUL when changing ktracing: only
generate one per process (not one per thread) and pass the correct
proc pointer down to the VFS layer. Permit generating of NAMI and
CSW records inside ktrace(2) itself.
ok deraadt@ millert@
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PG_PMAPMASK as all the possible pmap-specific bits (similar to the other
PG_fooMASK) to make sure MI code does not need to be updated, the next time
more bits are allocated to greedy pmaps.
No functional change, soon to be used by the (greedy) mips64 pmap.
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after analysis and testing. when flushing a large mmapped file, we can
eat up all the reserve bufs, but there's a good chance there will be more
clean ones available.
ok beck kettenis
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<machine/pmap.h> where it belongs, and compensate in <uvm/uvm_extern.h>
by including <uvm/uvm_pmap.h> before <uvm/uvm_page.h>. Tested on all
MACHINE_ARCH but amd64 and i386 (and hppa64).
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like the rest of tmpfs
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A few tweaks asked by kettenis@
(code doesn't affect systems without mounted tmpfs at all)
okay beck@
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list traversals with LIST_FOREACH.
ok beck@ krw@
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overloading of that thing.
the only hardware that seems to care about cylinders in our tree
are floppy drives, and the drivers for those calculate their own
cylinders from logical block addresses and ignore whatever the rest
of the kernel thought b_cylinders should be.
most of this diff is moving the floppy drivers to using b_resid as
a resid and using that as part of the calculation for real cylinder
values.
the rest of the diff is getting rid of the useless assignments to
b_cylinder that dont get used by anything (now that disksort is
gone).
ok miod@
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Resource maps have been removed more than 10 years ago, it's about time to
update comments to better match reality.
No functional change.
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aren't being passed to them. Fix UVM_WAIT() to not pass PNORELOCK to
tsleep(), as that flag only does something with msleep().
ok beck@ dlg@
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for completing swap io against files. this in turn bloated struct buf.
this moves from using workq_tasks to the task api, but stores the task
handler in vndbuf which is allocated specially for every io in this path
anyway.
ok kettenis@ beck@
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hibernate can use place the data.
ok mlarkin
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space (in case we need to place a hibernate signature there)
ok miod
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(u_int64_t) instead of (daddr_t) when casting a variable in an
expression passed to DL_SETDSIZE().
Change a variable counting open files from daddr_t to int64_t.
ok deraadt@ with the tweak to fix that pesky expression.
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