Commit Graph

1399 Commits

Author SHA1 Message Date
Alan Cox
85e03a7e1e Acquire and release the page queues lock around calls to pmap_protect()
because it updates flags within the vm page.

Approved by:	re (blanket)
2002-11-25 22:00:31 +00:00
Alan Cox
13dc71ed40 Extend the scope of the page queues/fields locking in vm_freeze_copyopts()
to cover pmap_remove_all().

Approved by:	re
2002-11-24 06:13:38 +00:00
Alan Cox
178949e021 Hold the page queues/flags lock when calling vm_page_set_validclean().
Approved by:	re
2002-11-23 19:10:31 +00:00
Alan Cox
ba0208b945 Assert that the page queues lock rather than Giant is held in
vm_pageout_page_free().

Approved by:	re
2002-11-23 08:08:54 +00:00
Alan Cox
e8a27959f6 Add page queue and flag locking in vnode_pager_setsize().
Approved by:	re
2002-11-23 03:58:35 +00:00
Jeff Roberson
855a310fcb - Add an event that is triggered when the system is low on memory. This is
intended to be used by significant memory consumers so that they may drain
   some of their caches.

Inspired by:	phk
Approved by:	re
Tested on:	x86, alpha
2002-11-21 09:17:56 +00:00
Jeff Roberson
74c924b553 - Wakeup the correct address when a zone is no longer full.
Spotted by:	jake
2002-11-18 08:27:14 +00:00
Alan Cox
a12cc0e489 Remove vm_page_protect(). Instead, use pmap_page_protect() directly. 2002-11-18 04:05:22 +00:00
Jeff Roberson
f3da1873bc - Don't forget the flags value when using boot pages.
Reported by:	grehan
2002-11-16 20:57:41 +00:00
Alan Cox
4fec79bef8 Now that pmap_remove_all() is exported by our pmap implementations
use it directly.
2002-11-16 07:44:25 +00:00
Alan Cox
81b9ee99e7 Remove dead code that hasn't been needed since the demise of share maps
in various revisions of vm/vm_map.c between 1.148 and 1.153.
2002-11-13 19:50:06 +00:00
Alan Cox
eea85e9bb6 Move pmap_collect() out of the machine-dependent code, rename it
to reflect its new location, and add page queue and flag locking.

Notes: (1) alpha, i386, and ia64 had identical implementations
of pmap_collect() in terms of machine-independent interfaces;
(2) sparc64 doesn't require it; (3) powerpc had it as a TODO.
2002-11-13 05:39:58 +00:00
Olivier Houchard
f64e99baa2 Remove extra #include<sys/vmmeter.h>. 2002-11-11 13:57:50 +00:00
Matt Jacob
81f71edaec atomic_set_8 isn't MI. Instead, follow Jake's suggestions about
ZONE_LOCK.
2002-11-11 11:50:03 +00:00
Alan Cox
6372d61e3e - Clear the page's PG_WRITEABLE flag in the i386's pmap_changebit()
if we're removing write access from the page's PTEs.
 - Export pmap_remove_all() on alpha, i386, and ia64.  (It's already
   exported on sparc64.)
2002-11-11 05:17:34 +00:00
Matt Jacob
7ca05a39c7 Use atomic_set_8 on the us_freelist maps as they are not otherwise
protected. Furthermore, in some RISC architectures with no normal
byte operations, the surrounding 3 bytes are also affected by the
read-modify-write that has to occur.
2002-11-10 16:16:44 +00:00
Alan Cox
d154fb4fe6 When prot is VM_PROT_NONE, call pmap_page_protect() directly rather than
indirectly through vm_page_protect().  The one remaining page flag that
is updated by vm_page_protect() is already being updated by our various
pmap implementations.

Note: A later commit will similarly change the VM_PROT_READ case and
eliminate vm_page_protect().
2002-11-10 07:12:04 +00:00
Alan Cox
f6116791a2 Fix an error case in vm_map_wire(): unwiring of an entry during cleanup
after a user wire error fails when the entry is already system wired.

Reported by:	tegge
2002-11-09 21:26:49 +00:00
Alan Cox
1f7c5f98d7 In vm_page_remove(), avoid calling vm_page_splay() if the object's memq
is empty.
2002-11-09 08:27:42 +00:00
Thomas Moestl
0fca57b8b8 Move the definitions of the hw.physmem, hw.usermem and hw.availpages
sysctls to MI code; this reduces code duplication and makes all of them
available on sparc64, and the latter two on powerpc.
The semantics by the i386 and pc98 hw.availpages is slightly changed:
previously, holes between ranges of available pages would be included,
while they are excluded now. The new behaviour should be more correct
and brings i386 in line with the other architectures.

Move physmem to vm/vm_init.c, where this variable is used in MI code.
2002-11-07 23:57:17 +00:00
Maxime Henrion
bf1001fa0f Better printf() formats. 2002-11-07 23:16:22 +00:00
Maxime Henrion
e47cd172e0 Some more printf() format fixes. 2002-11-07 23:03:04 +00:00
Maxime Henrion
cd034a5be9 Correctly print vm_offset_t types. 2002-11-07 22:49:07 +00:00
Alan Cox
ada2a050be Export the function vm_page_splay(). 2002-11-04 19:21:39 +00:00
Alan Cox
c71f01affe - Remove the memory allocation for the object/offset hash table
because it's no longer used.  (See revision 1.215.)
 - Fix a harmless bug: the number of vm_page structures allocated wasn't
   properly adjusted when uma_bootstrap() was introduced.  Consequently,
   we were allocating 30 unused vm_page structures.
 - Wrap a long line.
2002-11-03 22:20:42 +00:00
Alan Cox
02af9de6fc Remove the vm page buckets mutex. As of revision 1.215 of vm/vm_page.c,
it is unused.
2002-11-02 22:39:30 +00:00
Jeff Roberson
48eea37508 - Add support for machine dependant page allocation routines. MD code
may define UMA_MD_SMALL_ALLOC to make use of this feature.

Reviewed by:	peter, jake
2002-11-01 01:01:27 +00:00
Jeff Roberson
026aa839a4 - Add a new flag to vm_page_alloc, VM_ALLOC_NOOBJ. This tells
vm_page_alloc not to insert this page into an object.  The pindex is
   still used for colorization.
 - Rework vm_page_select_* to accept a color instead of an object and
   pindex to work with VM_PAGE_NOOBJ.
 - Document other VM_ALLOC_ flags.

Reviewed by:	peter, jake
2002-11-01 00:59:03 +00:00
Robert Watson
03ce2c0c9b Merge from MAC tree: rename mac_check_vnode_swapon() to
mac_check_system_swapon(), to reflect the fact that the primary
object of this change is the running kernel as a whole, rather
than just the vnode.  We'll drop additional checks of this
class into the same check namespace, including reboot(),
sysctl(), et al.

Obtained from:	TrustedBSD Project
Sponsored by:	DARPA, Network Associates Laboratories
2002-10-27 06:54:06 +00:00
Jeff Roberson
bbee39c629 - Now that uma_zalloc_internal is not the fast path don't be so fussy about
extra function calls.  Refactor uma_zalloc_internal into seperate functions
   for finding the most appropriate slab, filling buckets, allocating single
   items, and pulling items off of slabs.  This makes the code significantly
   cleaner.
 - This also fixes the "Returning an empty bucket." panic that a few people
   have seen.

Tested On:	alpha, x86
2002-10-24 07:59:03 +00:00
Jeff Roberson
bba739abf9 - Move the destructor calls so that they are not called with the zone lock
held.  This avoids a lock order reversal when destroying zones.
   Unfortunately, this also means that the free checks are not done before
   the destructor is called.

Reported by:	phk
2002-10-24 06:17:30 +00:00
Robert Watson
3e732e7d7d Invoke mac_check_vnode_mmap() during mmap operations on vnodes,
permitting policies to restrict access to memory mapping based on
the credential requesting the mapping, the target vnode, the
requested rights, or other policy considerations.

Approved by:	re
Obtained from:	TrustedBSD Project
Sponsored by:	DARPA, Network Associates Laboratories
2002-10-22 15:56:44 +00:00
Robert Watson
1cbfd977fd Introduce MAC_CHECK_VNODE_SWAPON, which permits MAC policies to
perform authorization checks during swapon() events; policies
might choose to enforce protections based on the credential
requesting the swap configuration, the target of the swap operation,
or other factors such as internal policy state.

Approved by:	re
Obtained from:	TrustedBSD Project
Sponsored by:	DARPA, Network Associates Laboratories
2002-10-22 15:53:43 +00:00
John Baldwin
1c865ac70e - Check that a process isn't a new process (p_state == PRS_NEW) before
trying to acquire it's proc lock since the proc lock may not have been
  constructed yet.
- Split up the one big comment at the top of the loop and put the pieces
  in the right order above the various checks.

Reported by:	kris (1)
2002-10-22 14:31:32 +00:00
Sheldon Hearn
29b4d52653 Fix typo in comments (misspelled "necessary"). 2002-10-22 12:10:27 +00:00
Alan Cox
f3b676f0ad o Reinline vm_page_undirty(), reducing the kernel size. (This reverts
a part of vm_page.h revision 1.87 and vm_page.c revision 1.167.)
2002-10-20 19:57:55 +00:00
Alan Cox
f4ecdf056e Complete the page queues locking needed for the page-based copy-
on-write (COW) mechanism.  (This mechanism is used by the zero-copy
TCP/IP implementation.)
 - Extend the scope of the page queues lock in vm_fault()
   to cover vm_page_cowfault().
 - Modify vm_page_cowfault() to release the page queues lock
   if it sleeps.
2002-10-19 18:34:39 +00:00
Matthew Dillon
b86ec922be Replace the vm_page hash table with a per-vmobject splay tree. There should
be no major change in performance from this change at this time but this
will allow other work to progress:  Giant lock removal around VM system
in favor of per-object mutexes, ranged fsyncs, more optimal COMMIT rpc's for
NFS, partial filesystem syncs by the syncer, more optimal object flushing,
etc.  Note that the buffer cache is already using a similar splay tree
mechanism.

Note that a good chunk of the old hash table code is still in the tree.
Alan or I will remove it prior to the release if the new code does not
introduce unsolvable bugs, else we can revert more easily.

Submitted by:	alc	(this is Alan's code)
Approved by:	re
2002-10-18 17:24:30 +00:00
Poul-Henning Kamp
af045176d1 Properly put macro args in ().
Spotted by:	FlexeLint.
2002-10-16 10:52:15 +00:00
Julian Elischer
d524d69b16 Remove old useless debugging code 2002-10-14 20:31:54 +00:00
Jeff Roberson
b43179fbe8 - Create a new scheduler api that is defined in sys/sched.h
- Begin moving scheduler specific functionality into sched_4bsd.c
 - Replace direct manipulation of scheduler data with hooks provided by the
   new api.
 - Remove KSE specific state modifications and single runq assumptions from
   kern_switch.c

Reviewed by:	-arch
2002-10-12 05:32:24 +00:00
John Baldwin
551cf4e150 Rename the mutex thread and process states to use a more generic 'LOCK'
name instead.  (e.g., SLOCK instead of SMTX, TD_ON_LOCK() instead of
TD_ON_MUTEX())  Eventually a turnstile abstraction will be added that
will be shared with mutexes and other types of locks.  SLOCK/TDI_LOCK will
be used internally by the turnstile code and will not be specific to
mutexes.  Making the change now ensures that turnstiles can be dropped
in at a later date without affecting the ABI of userland applications.
2002-10-02 20:31:47 +00:00
Scott Long
316ec49abd Some kernel threads try to do significant work, and the default KSTACK_PAGES
doesn't give them enough stack to do much before blowing away the pcb.
This adds MI and MD code to allow the allocation of an alternate kstack
who's size can be speficied when calling kthread_create.  Passing the
value 0 prevents the alternate kstack from being created.  Note that the
ia64 MD code is missing for now, and PowerPC was only partially written
due to the pmap.c being incomplete there.
Though this patch does not modify anything to make use of the alternate
kstack, acpi and usb are good candidates.

Reviewed by:	jake, peter, jhb
2002-10-02 07:44:29 +00:00
Poul-Henning Kamp
37c841831f Be consistent about "static" functions: if the function is marked
static in its prototype, mark it static at the definition too.

Inspired by:    FlexeLint warning #512
2002-09-28 17:15:38 +00:00
Jeff Roberson
3ef3e7c42b - Get rid of the unused LK_NOOBJ. 2002-09-25 01:24:58 +00:00
Jeff Roberson
6a2eac8acc - Lock access to numoutput on the swap devices. 2002-09-25 01:24:17 +00:00
Jeff Roberson
63e7e60dba - Add a ASSERT_VOP_LOCKED in vnode_pager_alloc.
- Lock access to v_iflags.
2002-09-25 01:23:43 +00:00
Matthew N. Dodd
4a2eca23ca Modify vm_map_clean() (and thus the msync(2) system call) to support
invalidation of cached pages for objects of type OBJT_DEVICE.

Submitted by:	Christian Zander <zander@minion.de>
Approved by:	alc
2002-09-22 08:22:32 +00:00
Alan Cox
e94ce82689 o Update some comments. 2002-09-22 04:33:43 +00:00
Jake Burkholder
05ba50f522 Use the fields in the sysentvec and in the vm map header in place of the
constants VM_MIN_ADDRESS, VM_MAXUSER_ADDRESS, USRSTACK and PS_STRINGS.
This is mainly so that they can be variable even for the native abi, based
on different machine types.  Get stack protections from the sysentvec too.
This makes it trivial to map the stack non-executable for certain abis, on
machines that support it.
2002-09-21 22:07:17 +00:00