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Commit Graph

1581 Commits

Author SHA1 Message Date
Alan Cox
bdbfbaafcc Add vm object locking to vm_object_coalesce(). 2003-06-03 19:37:01 +00:00
Alan Cox
cccf11b865 Change kernel_object and kmem_object to (&kernel_object_store) and
(&kmem_object_store), respectively.  This allows the address of these
objects to be resolved at link-time rather than run-time.
2003-06-01 23:59:48 +00:00
Poul-Henning Kamp
c5d771b807 Prepend _ to internal union members to avoid ambiguity.
Found by:       FlexeLint
2003-05-31 19:52:15 +00:00
Poul-Henning Kamp
0b074f6c93 Remove unused variables
Found by:       FlexeLint
2003-05-31 19:51:05 +00:00
Alan Cox
34567de7fc Add vm object locking to vm_object_madvise(). 2003-05-31 19:40:57 +00:00
David Schultz
e92686d065 If we seem to be out of VM, don't allow the pagedaemon to kill
processes in the first pass.  Among other things, this will give
us a chance to launder vnode-backed pages before concluding that
we need more swap.  This is particularly useful for systems that
have no swap.

While here, update a comment and remove some long-unused code.

Reported by:	Lucky Green <shamrock@cypherpunks.to>
Suggested by:	dillon
Approved by:	re (rwatson)
2003-05-19 00:51:07 +00:00
Alan Cox
1c500307d1 Reduce the size of a vm object by converting its shadow list from a TAILQ
to a LIST.

Approved by:	re (rwatson)
2003-05-18 04:10:16 +00:00
John Baldwin
90af4afacb - Merge struct procsig with struct sigacts.
- Move struct sigacts out of the u-area and malloc() it using the
  M_SUBPROC malloc bucket.
- Add a small sigacts_*() API for managing sigacts structures: sigacts_alloc(),
  sigacts_free(), sigacts_copy(), sigacts_share(), and sigacts_shared().
- Remove the p_sigignore, p_sigacts, and p_sigcatch macros.
- Add a mutex to struct sigacts that protects all the members of the struct.
- Add sigacts locking.
- Remove Giant from nosys(), kill(), killpg(), and kern_sigaction() now
  that sigacts is locked.
- Several in-kernel functions such as psignal(), tdsignal(), trapsignal(),
  and thread_stopped() are now MP safe.

Reviewed by:	arch@
Approved by:	re (rwatson)
2003-05-13 20:36:02 +00:00
Alan Cox
3a12f5da1f Give the kmem object's mutex a unique name, instead of "vm object",
to avoid false reports of lock-order reversal with a system map mutex.

Approved by:	re (jhb)
2003-05-09 02:13:23 +00:00
Alan Cox
658ad5fff5 Lock the vm_object when performing vm_pager_deallocate(). 2003-05-06 02:45:28 +00:00
Alan Cox
f7dd7b637b Extend the scope of the vm_object lock in vm_object_terminate(). 2003-05-04 19:23:40 +00:00
Alan Cox
c4a1d732a3 Avoid a lock-order reversal and implement vm_object locking
in vm_pageout_page_free().
2003-05-04 06:56:27 +00:00
Alan Cox
ad682c4825 Lock the vm_object on entry to vm_object_vndeallocate(). 2003-05-03 20:28:26 +00:00
Alan Cox
bff99f0d12 - Revert kern/vfs_subr.c revision 1.444. The vm_object's size isn't
trustworthy for vnode-backed objects.
 - Restore the old behavior of vm_object_page_remove() when the end
   of the given range is zero.  Add a comment to vm_object_page_remove()
   regarding this behavior.

Reported by:	iedowse
2003-05-03 08:09:24 +00:00
Alan Cox
f92039a1fc Move a declaration to its proper place. 2003-05-03 04:21:16 +00:00
Alan Cox
6be365253d Lock the vm_object when updating its shadow list. 2003-05-02 04:55:21 +00:00
Alan Cox
4f7c7f6e23 Simplify the removal of a shadow object in vm_object_collapse(). 2003-05-02 03:00:21 +00:00
Alan Cox
8e3a76fb6f Extend the scope of the vm_object locking in vm_object_split(). 2003-05-01 05:06:33 +00:00
Alan Cox
1534781737 - Update the vm_object locking in vm_object_reference().
- Convert some dead code in vm_object_reference() into a comment.
2003-05-01 03:29:20 +00:00
Alan Cox
4e73db5f40 Increase the scope of the vm_object lock in vm_map_delete(). 2003-04-30 19:18:09 +00:00
Alan Cox
85b1dc89b6 Eliminate an unused parameter from vm_pageout_object_deactivate_pages(). 2003-04-30 03:08:16 +00:00
Alan Cox
8ba20a48bd Add vm_object locking to vmspace_swap_count(). 2003-04-30 00:43:17 +00:00
Alan Cox
24b3046aac Remove unused declarations and definitions. 2003-04-29 18:49:25 +00:00
Alexander Kabaev
104a9b7e3e Deprecate machine/limits.h in favor of new sys/limits.h.
Change all in-tree consumers to include <sys/limits.h>

Discussed on:	standards@
Partially submitted by: Craig Rodrigues <rodrigc@attbi.com>
2003-04-29 13:36:06 +00:00
Alan Cox
17cd3642fe - Lock the vm_object when performing swap_pager_isswapped().
- Assert that the vm_object is locked in swap_pager_isswapped().
2003-04-28 17:13:53 +00:00
Alan Cox
82774d8040 uma_zone_set_obj() must perform VM_OBJECT_LOCK_INIT() if the caller
provides storage for the vm_object.
2003-04-28 06:11:32 +00:00
Alan Cox
ed6a786313 - Define VM_OBJECT_LOCK_INIT().
- Avoid repeatedly mtx_init()ing and mtx_destroy()ing the vm_object's lock
   using UMA's uminit callback, in this case, vm_object_zinit().
2003-04-28 03:45:35 +00:00
Alan Cox
c9917419ef - Tell witness that holding two or more vm_object locks is okay.
- In vm_object_deallocate(), lock the child when removing the parent
   from the child's shadow list.
2003-04-27 20:07:57 +00:00
Alan Cox
570a2f4ac5 Various changes to vm_object_shadow(): (1) update the vm_object locking,
(2) remove a pointless assertion, and (3) make a trivial change to a
comment.
2003-04-27 05:43:03 +00:00
Alan Cox
ecde4b3218 Various changes to vm_object_page_remove():
- Eliminate an odd, special-case feature:
   if start == end == 0 then all pages are removed.  Only one caller
   used this feature and that caller can trivially pass the object's
   size.
 - Assert that the vm_object is locked on entry; don't bother testing
   for a NULL vm_object.
 - Style: Fix lines that are longer than 80 characters.
2003-04-26 23:41:30 +00:00
Alan Cox
c829b9d0fc - Lock the vm_object on entry to vm_object_terminate(). 2003-04-26 19:36:19 +00:00
Alan Cox
1ca5895341 - Convert vm_object_pip_wait() from using tsleep() to msleep().
- Make vm_object_pip_sleep() static.
 - Lock the vm_object when performing vm_object_pip_wait().
2003-04-26 18:33:18 +00:00
Alan Cox
155080d31e - Extend the scope of two existing vm_object locks to cover
swap_pager_freespace().
2003-04-26 05:30:56 +00:00
Alan Cox
5103186c8c Remove an XXX comment. It is no longer a problem. 2003-04-26 05:00:56 +00:00
John Baldwin
8f88740381 - Don't bother using the proc lock to test just P_SYSTEM as that is set in
fork1() and never changes.
- The proc lock is enough to cover reading p_state, so push down sched_lock
  into the PRS_NORMAL case of the switch on p_state.
2003-04-25 20:06:30 +00:00
Alan Cox
6a07e90d63 - Lock the vm_object when iterating over its list of resident pages. 2003-04-25 16:30:02 +00:00
Alan Cox
5299887de5 - Relax the Giant required in vm_page_remove().
- Remove the Giant required from vm_page_free_toq().  (Any locking
   errors will be caught by vm_page_remove().)

This remedies a panic that occurred when kmem_malloc(NOWAIT) performed
without Giant failed to allocate the necessary pages.

Reported by:	phk
2003-04-25 06:35:05 +00:00
Alan Cox
875791f63d - Move swap_pager_isswapped()'s prototype to a more logical place. 2003-04-24 05:29:27 +00:00
Alan Cox
b6e48e0372 - Acquire the vm_object's lock when performing vm_object_page_clean().
- Add a parameter to vm_pageout_flush() that tells vm_pageout_flush()
   whether its caller has locked the vm_object.  (This is a temporary
   measure to bootstrap vm_object locking.)
2003-04-24 04:31:25 +00:00
John Baldwin
11edc1e0d7 Fix compiling in the NO_SWAPPING case.
Submitted by:	bde (partially)
2003-04-23 18:21:41 +00:00
John Baldwin
897ecacd64 Lock the proc to check p_flag and several other related tests in
vm_daemon().  We don't need to hold sched_lock as long now as a result.
2003-04-22 20:03:08 +00:00
John Baldwin
eeec6bab2e Prefer the proc lock to sched_lock when testing PS_INMEM now that it is
safe to do so.
2003-04-22 20:01:56 +00:00
John Baldwin
664f718ba1 - Always call faultin() in _PHOLD() if PS_INMEM is clear. This closes a
race where a thread could assume that a process was swapped in by
  PHOLD() when it actually wasn't fully swapped in yet.
- In faultin(), always msleep() if PS_SWAPPINGIN is set instead of doing
  this check after bumping p_lock in the PS_INMEM == 0 case.  Also,
  sched_lock is only needed for setting and clearning swapping PS_*
  flags and the swap thread inhibitor.
- Don't set and clear the thread swap inhibitor in the same loops as the
  pmap_swapin/out_thread() since we have to do it under sched_lock.
  Instead, mimic the treatment of the PS_INMEM flag and use separate loops
  to set the inhibitors when clearing PS_INMEM and clear the inhibitors
  when setting PS_INMEM.
- swapout() now returns with the proc lock held as it holds the lock
  while adjusting the swapping-related PS_* flags so that the proc lock
  can be used to test those flags.
- Only use the proc lock to check the swapping-related PS_* flags in
  several places.
- faultin() no longer requires sched_lock to be held by callers.
- Rename PS_SWAPPING to PS_SWAPPINGOUT to be less ambiguous now that we
  have PS_SWAPPINGIN.
2003-04-22 20:00:26 +00:00
Alan Cox
2e9d00a15d Revision 1.246 should have also included
- Weaken the assertion in vm_page_insert() to require Giant only if the
   vm_object isn't locked.

Reported by:	 "Ilmar S. Habibulin" <ilmar@watson.org>
2003-04-22 14:26:02 +00:00
Alan Cox
26da32cc73 Remove unused declarations. 2003-04-22 06:26:42 +00:00
Alan Cox
03d4c1e644 Revision 1.52 of vm/uma_core.c has led to UMA's obj_alloc() being
called without Giant; and obj_alloc() in turn calls vm_page_alloc()
without Giant.  This causes an assertion failure in vm_page_alloc().
Fortunately, obj_alloc() is now MPSAFE.  So, we need only clean up
some assertions.

 - Weaken the assertion in vm_page_lookup() to require Giant only
   if the vm_object isn't locked.
 - Remove an assertion from vm_page_alloc() that duplicates a check
   performed in vm_page_lookup().

In collaboration with:	gallatin, jake, jeff
2003-04-22 05:36:14 +00:00
Alan Cox
1c067f7ebc Add VM_OBJECT_LOCKED(). 2003-04-22 04:47:29 +00:00
Alan Cox
d647a0ed5a - Assert that the vm_object is locked in vm_object_clear_flag(),
vm_object_pip_add() and vm_object_pip_wakeup().
 - Remove GIANT_REQUIRED from vm_object_pip_subtract() and
   vm_object_pip_subtract().
 - Lock the vm_object when performing vm_object_page_remove().
2003-04-21 06:33:52 +00:00
Alan Cox
d7a013c320 - Lock the vm_object when performing either vm_object_clear_flag() or
vm_object_pip_wakeup().
2003-04-20 23:23:41 +00:00
Alan Cox
1d284e00b5 - Update the vm_object locking in vm_map_insert(). 2003-04-20 21:56:40 +00:00