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174 Commits

Author SHA1 Message Date
Bruce Evans
3aa12267a5 Add and move declarations to fix all of the warnings from `gcc -Wimplicit' 
(except in netccitt, netiso and netns) that I didn't notice when I fixed
"all" such warnings before.
 1995-03-28 07:58:53 +00:00
David Greenman
17c4c40800 Fixed typo...using wrong variable in page_shortage calculation. 1995-03-28 05:58:35 +00:00
David Greenman
0bb3a0d2f4 Fixed "pages freed by daemon" statistic (again). 1995-03-28 05:35:29 +00:00
David Greenman
2ddba2158c Explicitly set page dirty if this is a write fault - reduces calls to 
pmap_is_modified() later.
 1995-03-27 02:41:00 +00:00
David Greenman
8953151fc8 Removed some obsolete flags. 
Submitted by:   John Dyson
 1995-03-26 23:33:14 +00:00
David Greenman
6c534ad868 Fix logic bug I just introduced with the flags to msync(). 1995-03-25 17:44:03 +00:00
David Greenman
492d73bd99 Pass syncio flag to vm_object_clean(). It remains unimplemented, however. 1995-03-25 17:36:57 +00:00
David Greenman
1e62bc6357 Disallow both MS_ASYNC and MS_INVALIDATE flags being set at the same time 
in msync().
 1995-03-25 17:36:00 +00:00
David Greenman
e6c6af1149 Added "flags" argument to msync, and implemented MS_ASYNC and MS_INVALIDATE. 
The MS_ASYNC flag doesn't current work, and MS_INVALIDATE will only toss out
the pages in the address space (not all pages in the shadow chain).
 1995-03-25 16:55:46 +00:00
David Greenman
7fd9a8b12f Implemented cnt.v_reactivated and moved vm_page_activate() routine to 
before vm_page_deactivate().
 1995-03-25 08:47:35 +00:00
David Greenman
260295f979 Removed (almost) meaningless "object cache lookups/hits" statistic. In 
our framework, these numbers will usually be nearly the same, and not
because of any sort of high 'hit rate'.
 1995-03-25 08:42:14 +00:00
David Greenman
a34297995a Removed cnt.v_nzfod: In our current scheme of things it is not possible 
to accurately track this. It isn't an indicator of resource consumption
anyway.
Removed cnt.v_kernel_pages: We don't implement this and doing so accurately
would be very difficult (and ambiguous - since process pages are often
double mapped in the kernel and the process address spaces).
 1995-03-25 06:09:33 +00:00
David Greenman
d7a0fc9360 Fixed warning caused by returning a value in a void function (introduced 
in a recent commit by me). Relaxed checks before calling vm_object_remove;
a non-internal object always has a pager.
 1995-03-23 05:19:44 +00:00
David Greenman
f5cf85d40a Removed unused fifth argument to vm_object_page_clean(). Fixed bug with 
VTEXT not always getting cleared when it is supposed to. Added check to
make sure that vm_object_remove() isn't called with a NULL pager or for
a pager for an OBJ_INTERNAL object (neither of which will be on the hash
list). Clear OBJ_CANPERSIST if we decide to terminate it because of no
resident pages.
 1995-03-22 12:24:11 +00:00
David Greenman
563128e49e Fixed potential sleep/wakeup race conditional with splhigh(). 
Submitted by:	John Dyson
 1995-03-22 08:08:44 +00:00
David Greenman
c419d77e29 Added a check for wrong object size; print a warning, but deal with it 
correctly. The warning will tell us that there is a bug somewhere else
in sizing the object correctly.

Submitted by:	John Dyson
 1995-03-22 05:12:18 +00:00
David Greenman
8f4e17d4b2 Fixed bug in vm_mmap() where the object that is created in some cases 
was the wrong size. This is the likely cause of panics reported by
Lars Fredriksen and Paul Richards related to a -1 blkno when paging
via the swap_pager.

Submitted by:	John Dyson
 1995-03-22 05:08:41 +00:00
David Greenman
1b369d9858 Removed unused variable declaration missed in previous commit. 1995-03-21 23:09:53 +00:00
David Greenman
71263bf8db Removed do-nothing VOP_UPDATE() call. 1995-03-21 23:07:19 +00:00
David Greenman
bc9ad24756 Disallow non page-aligned file offsets in vm_mmap(). We don't support this 
in either the high or low level parts of the VM system. Just return EINVAL
in this case, just like SunOS does.
 1995-03-21 10:15:52 +00:00
David Greenman
fbcfcdf7db Fixed bug in the size == 0 case of msync() caused by a bogus return value 
check..
 1995-03-21 02:54:04 +00:00
David Greenman
7c1f6cedec Added a new boolean argument to vm_object_page_clean that causes it to 
only toss out clean pages if TRUE.
 1995-03-21 01:11:44 +00:00
David Greenman
0426122fa0 Don't gain/lose an object reference in vnode_pager_setsize(). It will 
cause vnode locking problems in vm_object_terminate().
Implement proper vnode locking in vm_object_terminate().
 1995-03-20 10:20:42 +00:00
David Greenman
9ba0a56334 Fixed "objde1" hang. It was caused by a "&" where an "&&" belonged in the 
expression that decides if a wakeup should occur.
 1995-03-20 10:14:55 +00:00
David Greenman
83edfd47d8 Removed an unnecessary call to vinvalbuf after the page clean. 1995-03-20 02:06:09 +00:00
David Greenman
0bdb7528db Do proper vnode locking when doing paging I/O. Removed the asynchronous 
paging capability to facilitate this (we saw little or no measureable
improvement with this anyway).

Submitted by:	John Dyson
 1995-03-19 23:46:25 +00:00
David Greenman
edf8a81561 Removed redundant newlines that were in some panic strings. 1995-03-19 14:29:26 +00:00
David Greenman
c01a9b8ca0 Incorporated 4.4-lite vnode_pager_uncache() and vnode_pager_umount() 
routines (and merged local changes). The changed vnode_pager_uncache
gets rids of the bogosity that you can call the routine without
having the vnode locked. The changed vnode_pager_umount properly locks
the vnode before calling vnode_pager_uncache.
 1995-03-19 12:36:10 +00:00
David Greenman
806e386083 In vm_page_alloc_contig: Removed a redundant semicolon and used 'm' instead 
of &pga[i] in one place.
 1995-03-18 01:04:36 +00:00
Bruce Evans
b5e8ce9f12 Add and move declarations to fix all of the warnings from `gcc -Wimplicit' 
(except in netccitt, netiso and netns) and most of the warnings from
`gcc -Wnested-externs'.  Fix all the bugs found.  There were no serious
ones.
 1995-03-16 18:17:34 +00:00
David Greenman
5eb7d0cd2e Special cased the handling of mb_map in the M_WAITOK case. kmem_malloc() 
now returns NULL and sets a global 'mb_map_full' when the map is full.
m_clalloc() has further been taught to expect this and do the right thing.
This should fix the "mb_map full" panics that several people have reported.
 1995-03-15 07:52:06 +00:00
Bruce Evans
1475d9283e Move a kernel inline function inside `#ifdef KERNEL' so that including 
<vm/vm.h> doesn't cause warnings about nonexistent functions called
by the inline function.  Clean up the formatting of the function.
 1995-03-12 12:42:00 +00:00
David Greenman
c4ed5a07a5 Fixed obsolete comment. 1995-03-12 08:11:34 +00:00
David Greenman
6879ca0fcd Deleted vm_object_setpager(). 1995-03-12 08:05:46 +00:00
David Greenman
61ca29b0e5 Deleted vm_object_setpager(). 1995-03-12 07:58:29 +00:00
David Greenman
4bb624613f Explicitly set object->flags = OBJ_CANPERSIST. 1995-03-12 07:56:06 +00:00
David Greenman
a14e8fd032 Fix completely bogus comment. 1995-03-11 22:25:20 +00:00
David Greenman
63635f5ae2 Clear OBJ_INTERNAL flag for device pager objects and named anonymous 
objects.
 1995-03-11 22:25:02 +00:00
David Greenman
0007244260 Set VAGE flag when pager is destroyed. This usually happens when an 
object has fallen off the end of the cached list - this is likely the
last reference to the vnode and it should be reused before non file
vnodes that are already on the free list (VDIR mostly).
 1995-03-07 19:04:10 +00:00
David Greenman
f2da180f8e Fixed object reference count problem that occurred in the MAP_PRIVATE 
case after we rewrote vm_mmap(). Added some comments to make it easier
to follow the reference counts.
 1995-03-07 17:27:49 +00:00
David Greenman
be6d5bfac7 Don't attempt to reverse collapse non OBJ_INTERNAL objects. 1995-03-07 17:25:46 +00:00
Jordan K. Hubbard
7b936a1e66 Remove a gratutious cast. 1995-03-04 21:14:19 +00:00
David Greenman
f919ebde54 Various changes from John and myself that do the following: 
New functions create - vm_object_pip_wakeup and pagedaemon_wakeup that
are used to reduce the actual number of wakeups.
New function vm_page_protect which is used in conjuction with some new
page flags to reduce the number of calls to pmap_page_protect.
Minor changes to reduce unnecessary spl nesting.
Rewrote vm_page_alloc() to improve readability.
Various other mostly cosmetic changes.
 1995-03-01 23:30:04 +00:00
David Greenman
54ab07303b Slight change to include file order to accommodate upcoming changes. 1995-03-01 21:37:44 +00:00
Bruce Evans
4f9fb771a5 Don't use __P(()) in a function definition. 1995-02-25 18:39:04 +00:00
David Greenman
c3a1e4250f Fixed severely broken printf (arguments out of order, no newline). 1995-02-25 17:02:48 +00:00
David Greenman
b106f3b255 Removed redundant HOLDRELE()'s. 1995-02-23 22:32:38 +00:00
David Greenman
187f007190 Changed return value from vnode_pager_addr to be in DEV_BSIZE units so 
that 9 bits aren't lost in the conversion. Changed all callers to expect
this. This allows paging on large (>2GB) filesystems.

Submitted by:	John Dyson
 1995-02-22 10:34:34 +00:00
David Greenman
6f2b142ed8 vm_page.c: 
Use request==VM_ALLOC_NORMAL rather than object!=kmem_object in deciding
if the caller is "important" in vm_page_alloc(). Also established a new
low threshold for non-interrupt allocations via cnt.v_interrupt_free_min.

vm_pageout.c:
Various algorithmic cleanup. Some calculations simplified. Initialize
cnt.v_interrupt_free_min to 2 pages.

Submitted by:	John Dyson
 1995-02-22 10:27:24 +00:00
David Greenman
5e716206c0 Just return in the case of a page not on any queue in vm_page_unqueue(). 
Return VM_PAGE_BITS_ALL even if size > PAGE_SIZE in vm_page_bits().

Submitted by:	John Dyson
 1995-02-22 10:16:21 +00:00