Commit Graph

316 Commits

Author SHA1 Message Date
chs e72214422a initialize aref.ar_pageoff even if there's no amap. 2000-06-13 04:10:47 +00:00
soda d5b3fb3ce1 fix printf format mismatch, when paddr_t becomes (long long) on arc port. 2000-06-09 04:43:19 +00:00
thorpej b0afc900f5 Change UVM_UNLOCK_AND_WAIT() to use ltsleep() (it is now atomic, as
advertised).  Garbage-collect uvm_sleep().
2000-06-08 05:52:34 +00:00
pk 36a1354bc6 Change previous to use `vm_map_min(dstmap)' instead of hard-coding
VM_MIN_KERNEL_ADDRESS.
2000-06-05 07:28:56 +00:00
pk 51ff5f7cd1 Let uvm_map_extract() set the lower bound on the kernel address range
itself, in stead of having its callers do that.
2000-06-02 12:02:43 +00:00
pk bf3a6b350b Shouldn't pass garbage to uvm_map_extract(). 2000-06-02 11:47:53 +00:00
thorpej 65184f2470 Change the comment before the vm_page_zero_enable global to indicate
what it will now be used for.
2000-05-29 19:25:56 +00:00
drochner f8a6b48d66 Don't silently truncate the voff_t offset to vaddr_t when passing it to
udv_attach. Pass the whole voff_t instead and do an explicite overflow
check before it is passed to the device's mmap handler (as "int", sadly).
2000-05-28 10:21:55 +00:00
thorpej e03e9e8086 Rather than starting init and creating kthreads by forking and then
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.
2000-05-28 05:48:59 +00:00
thorpej a7d0570e67 First sweep at scheduler state cleanup. Collect MI scheduler
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.
2000-05-26 21:19:19 +00:00
thorpej 8964c35eca Introduce a new process state distinct from SRUN called SONPROC
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.
2000-05-26 00:36:42 +00:00
enami 332c98526a - Move the comment, which describes that calling the function
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.
2000-05-23 02:19:20 +00:00
thorpej 1410091b4e Clean up a comment. 2000-05-20 19:54:01 +00:00
thorpej cd737c4016 Remove VM_PROT_EXECUTE from the permissions used to map the page
for pager I/O -- it is not needed, and including it leads to
unnecessary I-cache flushes.
2000-05-20 03:36:06 +00:00
thorpej 646555bbd5 Clean up some indentation lossage in uvm_map_extract(). 2000-05-19 17:43:55 +00:00
thorpej f636538446 NULL != 0 2000-05-19 04:34:39 +00:00
thorpej 655b21e17d Tell uvm_pagermapin() the direction of the I/O so that it can map
with only the protection that it needs.
2000-05-19 03:45:04 +00:00
thorpej f3b078d268 __predict_false() an error check. 2000-05-08 23:13:42 +00:00
thorpej d45c9982df __predict_false() DIAGNOSTIC error checks. 2000-05-08 23:11:53 +00:00
thorpej 39294d89e5 __predict_false() out-of-resource conditions and DIAGNOSTIC error checks. 2000-05-08 23:10:20 +00:00
thorpej b5b82faa4a uvm_map_setup(): We almost ever set up an interrupt-safe map, but we
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.
2000-05-08 22:59:35 +00:00
thorpej 9ec517a68e Changes necessary to implement pre-zero'ing of pages in the idle loop:
- 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.
2000-04-24 17:12:00 +00:00
chs d444bb4032 undo rev 1.13, which is to say, don't block interrupts while deactivating
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.
2000-04-16 20:52:29 +00:00
mrg 6b7f13609a remove <vm/vm_swap.h> and <vm/vm_conf.h> 2000-04-15 18:08:12 +00:00
pk 741c324930 Finish previous. 2000-04-11 08:12:14 +00:00
chs 8724ec3b5c avoid declarating "i" as a local variable in a macro.
it's too easy to shadow another local.
2000-04-11 02:34:19 +00:00
chs 66014d2dff sparc -> __sparc__
print lock status in uvm_object_printit().
2000-04-10 02:21:26 +00:00
chs 061ecbff46 tidy. 2000-04-10 02:20:06 +00:00
thorpej eeb3a38cfc Use UVM_PGA_ZERO in the promote-zero-fault case of uvm_fault(). 2000-04-10 01:17:41 +00:00
thorpej 345b3d2136 Use UVM_PGA_ZERO in a few (easy) places. 2000-04-10 00:32:46 +00:00
thorpej 2c48131727 Add UVM_PGA_ZERO which instructs uvm_pagealloc{,_strat}() to return a
zero'd, ! PG_CLEAN page, as if it were uvm_pagezero()'d.
2000-04-10 00:28:05 +00:00
chs d75d6fb164 restore a brelvp() that I removed in a moment of overzealousness.
Debugged by:  Brian Grayson <bgrayson@netbsd.org>
2000-04-07 08:27:28 +00:00
chs 60a7a67f71 remove uvm_shareprot(). no longer needed since the demise of share maps. 2000-04-03 08:09:02 +00:00
chs 03a4ef3a79 remove the "shareprot" pagerop. it's not needed anymore since
share maps are long gone.
2000-04-03 07:35:23 +00:00
thorpej 2bc5adb20e Instead of checking vm_physmem[<physseg>].pgs to determine if
uvm_page_init() has completed, add a boolean uvm.page_init_done,
and test against that.  Use this same boolean (rather than
pmap_initialized) in pmap_growkernel() to determine if we are
being called via uvm_page_init() to grow the kernel address space.

This fixes a problem on some i386 configurations where pmap_init()
itself was needing to have the kernel page table grown, and since
pmap_initialized was not yet set to TRUE, pmap_growkernel() was
choosing the wrong code path.

Fix tested by Havard Eidnes.
2000-04-02 20:39:14 +00:00
augustss 641df97d12 Remove more register declarations. 2000-03-30 12:31:50 +00:00
simonb 171910636e Delete redundant decl of aobj_pager - it's in <uvm/uvm_aobj.h>. 2000-03-30 02:49:55 +00:00
simonb b2a7dc176d Remove redundant decl for uvmspace_fork() - it's in <uvm/uvm_extern.h>. 2000-03-29 04:05:47 +00:00
simonb 0fd09c8496 Don't need to include <sys/conf.h> here. 2000-03-29 03:43:33 +00:00
kleink 7e35a43e67 In mmap(), bail out with EOVERFLOW when mapping a regular file and the file
offset plus mapping length cannot be represented in an off_t.
2000-03-28 18:45:19 +00:00
kleink a51ef2c3f9 Kill duplicate uvn_attach() prototype (public, already in uvm_vnode.h). 2000-03-27 16:58:23 +00:00
kleink 6e5b64c8a0 Merge parts of chs-ubc2 into the trunk:
Add a new type voff_t (defined as a synonym for off_t) to describe offsets
into uvm objects, and update the appropriate interfaces to use it, the
most visible effect being the ability to mmap() file offsets beyond
the range of a vaddr_t.

Originally by Chuck Silvers; blame me for problems caused by merging this
into non-UBC.
2000-03-26 20:54:45 +00:00
kleink 08025fbc20 Kill duplicate udv_attach() prototype; it's a public interface, and declared
in uvm_device.h.
2000-03-26 20:46:59 +00:00
soren 95054da1a1 Fix doubled 'the's in comments. 2000-03-13 23:52:25 +00:00
thorpej 9671588a30 Allocate the page buckets out of kernel_map, not kmem_map. Saves 16
or so kmem_map pages on a 32MB SPARCstation 2.
2000-02-13 03:34:40 +00:00
thorpej eb9cbbe294 Add some very simple code to auto-size the kmem_map. We take the
amount of physical memory, divide it by 4, and then allow machine
dependent code to place upper and lower bounds on the size.  Export
the computed value to userspace via the new "vm.nkmempages" sysctl.

NKMEMCLUSTERS is now deprecated and will generate an error if you
attempt to use it.  The new option, should you choose to use it,
is called NKMEMPAGES, and two new options NKMEMPAGES_MIN and
NKMEMPAGES_MAX allow the user to configure the bounds in the kernel
config file.
2000-02-11 19:22:52 +00:00
thorpej fe551f0e64 Fix a bug in disksort_*() which caused non-optimal ordering when multiple
active partitions were on a single spindle.  Add a b_rawblkno member to
struct buf which contains the non-partition-relative block number to sort
by.
2000-02-07 20:16:47 +00:00
chs 26c744c85b remove a debug printf that has outlived its usefulness. 2000-01-28 08:02:48 +00:00
thorpej 0b0aecffd6 Update for sys/buf.h/disksort_*() changes. 2000-01-21 23:43:10 +00:00
chs 16f0ca3612 add support for ``swapctl -d'' (removing swap space).
improve handling of i/o errors in swap space.

reviewed by:  Chuck Cranor
2000-01-11 06:57:49 +00:00