rlimit in sbrk. Slightly modified from a patch from Artur Grabowski.
- Rearrange code slightly, partially from Artur Grabowski.
- Only adjust vm_dsize if the grow or shrink actually succeeds.
<vm/vm_extern.h> merged into <uvm/uvm_extern.h>
<vm/vm_page.h> merged into <uvm/uvm_page.h>
<vm/pmap.h> has become <uvm/uvm_pmap.h>
this leaves just <vm/vm.h> in NetBSD.
<vm/pglist.h> -> <uvm/uvm_pglist.h>
<vm/vm_inherit.h> -> <uvm/uvm_inherit.h>
<vm/vm_kern.h> -> into <uvm/uvm_extern.h>
<vm/vm_object.h> -> nothing
<vm/vm_pager.h> -> into <uvm/uvm_pager.h>
also includes a bunch of <vm/vm_page.h> include removals (due to redudancy
with <vm/vm.h>), and a scattering of other similar headers.
"off_t" and the return value is a "paddr_t" to allow mappings
at offsets past 2^31 bytes. Somewhat inspired by FreeBSD, which
only changed the offset to a "vm_offset_t".
Includes updates for the i386, pc532 and sh3 mmmmap from Jason Thorpe.
doing a cpu_set_kpc(), just pass the entry point and argument all
the way down the fork path starting with fork1(). In order to
avoid special-casing the normal fork in every cpu_fork(), MI code
passes down child_return() and the child process pointer explicitly.
This fixes a race condition on multiprocessor systems; a CPU could
grab the newly created processes (which has been placed on a run queue)
before cpu_set_kpc() would be performed.
state into global and per-CPU scheduler state:
- Global state: sched_qs (run queues), sched_whichqs (bitmap
of non-empty run queues), sched_slpque (sleep queues).
NOTE: These may collectively move into a struct schedstate
at some point in the future.
- Per-CPU state, struct schedstate_percpu: spc_runtime
(time process on this CPU started running), spc_flags
(replaces struct proc's p_schedflags), and
spc_curpriority (usrpri of processes on this CPU).
- Every platform must now supply a struct cpu_info and
a curcpu() macro. Simplify existing cpu_info declarations
where appropriate.
- All references to per-CPU scheduler state now made through
curcpu(). NOTE: this will likely be adjusted in the future
after further changes to struct proc are made.
Tested on i386 and Alpha. Changes are mostly mechanical, but apologies
in advance if it doesn't compile on a particular platform.
which indicates that the process is actually running on a
processor. Test against SONPROC as appropriate rather than
combinations of SRUN and curproc. Update all context switch code
to properly set SONPROC when the process becomes the current
process on the CPU.
uvm_map_pageable(map, ...) implies unlocking passed map, just before the
function call.
- If we bail out before calling the uvm_map_pageable, unlock the map
by ourself to prevent a panic ``locking against myself''. The panic is,
for example, caused when cdrecord is invoked with too large fifo size.
set up quite a few regular ones (at every fork!), so put interrupt-
safe map setup in the slow path with a __predict_false().
uvm_map_reference(): __predict_false() the check for NULL map.
uvm_map_deallocate(): Likewise.
- Make page free lists have two actual queues: known-zero pages and
pages with unknown contents.
- Implement uvm_pageidlezero(). This function attempts to zero up to
the target number of pages until the target has been reached (currently
target is `all free pages') or until whichqs becomes non-zero (indicating
that a process is ready to run).
- Define a new hook for the pmap module for pre-zero'ing pages. This is
used to zero the pages using uncached access. This allows us to zero
as many pages as we want without polluting the cache.
In order to use this feature, each platform must add the appropropriate
glue in their idle loop.
one pmap and activating another. this isn't actually necessary (since
pmap_activate() and pmap_deactivate() affect only user-level mappings,
which cannot be accessed from interrupts anyway), and pmap_activate()
is very slow on old sun4c sparcs so we can't block interrupts for this long.
this fixes PR 8322.
thorpej