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323 Commits

Author SHA1 Message Date
imp
04c9462c02 Remove advertising clause from University of California Regent's license, 
per letter dated July 22, 1999.

Approved by: core
 2004-04-06 20:15:37 +00:00
alc
81dacfa43e Implement a work around for the deadlock avoidance case in 
vm_object_deallocate() so that it doesn't spin forever either.

Submitted by:	bde
 2004-03-08 03:54:36 +00:00
alc
28e2e6f950 Correct a long-standing race condition in vm_object_page_remove() that 
could result in a dirty page being unintentionally freed.

Reviewed by:	tegge
MFC after:	7 days
 2004-02-22 03:36:51 +00:00
alc
12eb36a03f Don't acquire Giant in vm_object_deallocate() unless the object is vnode- 
backed.
 2004-01-18 03:44:14 +00:00
alc
343d2552f5 Revision 1.74 of vm_meter.c ("Avoid lock-order reversal") makes the release 
and subsequent reacquisition of the same vm object lock in
vm_object_collapse() unnecessary.
 2004-01-02 19:57:45 +00:00
alc
8218d18537 - Modify vm_object_split() to expect a locked vm object on entry and 
return on a locked vm object on exit.  Remove GIANT_REQUIRED.
 - Eliminate some unnecessary local variables from vm_object_split().
 2003-12-30 22:28:36 +00:00
alc
269cf5aa09 - Rename vm_map_clean() to vm_map_sync(). This better reflects the fact 
that msync(2) is its only caller.
 - Migrate the parts of the old vm_map_clean() that examined the internals
   of a vm object to a new function vm_object_sync() that is implemented in
   vm_object.c.  At the same, introduce the necessary vm object locking so
   that vm_map_sync() and vm_object_sync() can be called without Giant.

Reviewed by:	tegge
 2003-11-09 05:25:35 +00:00
alc
f2e8aed3e6 - Increase the scope of two vm object locks in vm_object_split(). 2003-11-02 22:52:42 +00:00
alc
28e8cd183d - Introduce and use vm_object_reference_locked(). Unlike 
vm_object_reference(), this function must not be used to reanimate dead
   vm objects.  This restriction simplifies locking.

Reviewed by:	tegge
 2003-11-02 21:30:10 +00:00
alc
75da97558f - Increase the scope of two vm object locks in vm_object_collapse(). 
- Remove the acquisition and release of Giant from vm_object_coalesce().
 2003-11-01 23:06:41 +00:00
alc
716130a6f9 - Modify swap_pager_copy() and its callers such that the source and 
destination objects are locked on entry and exit.  Add comments to
   the callers noting that the locks can be released by swap_pager_copy().
 - Remove several instances of GIANT_REQUIRED.
 2003-11-01 08:57:26 +00:00
alc
8ded4dfb69 - Additional vm object locking in vm_object_split() 
- New vm object locking assertions in vm_page_insert() and
   vm_object_set_writeable_dirty()
 2003-11-01 04:54:23 +00:00
alc
ab63139b09 - Revert a part of revision 1.73: Make vm_object_set_flag() an inline 
function.  This function is so trivial that inlining reduces the size
   of the kernel.
 2003-10-31 20:17:00 +00:00
alc
be546fdee4 - Take advantage of the swap pager locking: Eliminate the use of Giant 
from vm_object_madvise().
 - Remove excessive blank lines from vm_object_madvise().
 2003-10-31 18:32:03 +00:00
alc
dd1d2bd790 - Simplify vm_object_collapse()'s collapse case, reducing the number 
of lock acquires and releases performed.
 - Move an assertion from vm_object_collapse() to vm_object_zdtor()
   because it applies to all cases of object destruction.
 2003-10-26 06:29:26 +00:00
alc
bccf1d15ab - Increase the object lock's scope in vm_contig_launder() so that access 
to the object's type field and the call to vm_pageout_flush() are
   synchronized.
 - The above change allows for the eliminaton of the last parameter
   to vm_pageout_flush().
 - Synchronize access to the page's valid field in vm_pageout_flush()
   using the containing object's lock.
 2003-10-18 21:09:21 +00:00
jeff
25821dd99f - Use the UMA_ZONE_VM flag on the fakepg and object zones to prevent 
vm recursion and LORs.  This may be necessary for other zones created in
   the vm but this needs to be verified.
 2003-10-04 14:21:53 +00:00
alc
1283b3d480 Remove GIANT_REQUIRED from vm_object_shadow(). 2003-09-17 07:00:14 +00:00
alc
38e47abc4a Eliminate the use of Giant from vm_object_reference(). 2003-09-15 05:58:27 +00:00
alc
b182e8a6eb There is no need for an atomic increment on the vm object's generation 
count in _vm_object_allocate().  (Access to the generation count is
governed by the vm object's lock.)  Note: the introduction of the
atomic increment in revision 1.238 appears to be an accident.  The
purpose of that commit was to fix an Alpha-specific bug in UMA's
debugging code.
 2003-09-13 20:07:26 +00:00
phk
df05426cf5 Remove an unused variable. 2003-08-06 12:09:34 +00:00
alc
56615188dc Allow vm_object_reference() on kernel_object without Giant. 2003-07-27 05:43:58 +00:00
phk
df7d325032 Don't inline very large functions. 
Gcc has silently not been doing this for a long time.
 2003-07-22 09:27:58 +00:00
alc
17a3946774 Complete the vm object locking in vm_object_backing_scan(); specifically, 
deal with the case where we need to sleep on a busy page with two vm object
locks held.
 2003-06-22 02:35:06 +00:00
alc
ab509a1fdd - Increase the scope of the vm object lock in vm_object_collapse(). 
- Assert that the vm object and its backing vm object are both locked in
   vm_object_qcollapse().
 2003-06-21 04:14:48 +00:00
obrien
b0678d7a44 Use __FBSDID(). 2003-06-11 23:50:51 +00:00
alc
fd950733b7 Don't use vm_object_set_flag() to initialize the vm object's flags. 2003-06-09 06:50:02 +00:00
alc
6a3f0ec4b1 - Properly handle the paging_in_progress case on two vm objects in 
vm_object_deallocate().
 - Remove vm_object_pip_sleep().
 2003-06-08 23:01:24 +00:00
alc
9b7a0e2182 Pass the vm object to vm_object_collapse() with its lock held. 2003-06-07 02:29:17 +00:00
alc
37fef77ad3 - Extend the scope of the backing object's lock in vm_object_collapse(). 2003-06-05 20:55:27 +00:00
alc
3be7bee315 - Add further vm object locking to vm_object_deallocate(), specifically, 
for accessing a vm object's shadows.
 2003-06-04 21:07:42 +00:00
alc
1c0932407b - Add vm object locking to vm_object_deallocate(). (Still more 
changes are required.)
 - Remove special-case macros for kmem object locking.  They are
   no longer used.
 2003-06-04 06:00:55 +00:00
alc
16c442a3a1 Add vm object locking to vm_object_coalesce(). 2003-06-03 19:37:01 +00:00
alc
5ba1cfe547 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
alc
bd43f8c10d Add vm object locking to vm_object_madvise(). 2003-05-31 19:40:57 +00:00
alc
e90c007e3f 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
alc
2a876b006b 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
alc
d18bfec38d Lock the vm_object when performing vm_pager_deallocate(). 2003-05-06 02:45:28 +00:00
alc
65684800f0 Extend the scope of the vm_object lock in vm_object_terminate(). 2003-05-04 19:23:40 +00:00
alc
f9966ce9e8 Lock the vm_object on entry to vm_object_vndeallocate(). 2003-05-03 20:28:26 +00:00
alc
410b675ed9 - 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
alc
76bbaa0d89 Move a declaration to its proper place. 2003-05-03 04:21:16 +00:00
alc
da0d4657d3 Lock the vm_object when updating its shadow list. 2003-05-02 04:55:21 +00:00
alc
8a339564b6 Simplify the removal of a shadow object in vm_object_collapse(). 2003-05-02 03:00:21 +00:00
alc
9a40fc3cd6 Extend the scope of the vm_object locking in vm_object_split(). 2003-05-01 05:06:33 +00:00
alc
c2343f725b - 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
alc
72d436f39a - 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
alc
d1369599ac - 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
alc
a22a473401 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
alc
d5ac0bc453 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