Commit Graph

1359 Commits

Author SHA1 Message Date
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
Alan Cox
8aadcc5368 Reduce namespace pollution.
Submitted by:	bde
2002-09-21 07:51:44 +00:00
Jeff Roberson
f461cf2297 - Use my freebsd email alias in the copyright.
- Remove redundant instances of my email alias in the file summary.
2002-09-19 06:05:32 +00:00
Jeff Roberson
99571dc345 - Split UMA_ZFLAG_OFFPAGE into UMA_ZFLAG_OFFPAGE and UMA_ZFLAG_HASH.
- Remove all instances of the mallochash.
 - Stash the slab pointer in the vm page's object pointer when allocating from
   the kmem_obj.
 - Use the overloaded object pointer to find slabs for malloced memory.
2002-09-18 08:26:30 +00:00
Nate Lawson
06be2aaa83 Remove all use of vnode->v_tag, replacing with appropriate substitutes.
v_tag is now const char * and should only be used for debugging.

Additionally:
1. All users of VT_NTS now check vfsconf->vf_type VFCF_NETWORK
2. The user of VT_PROCFS now checks for the new flag VV_PROCDEP, which
is propagated by pseudofs to all child vnodes if the fs sets PFS_PROCDEP.

Suggested by:   phk
Reviewed by:    bde, rwatson (earlier version)
2002-09-14 09:02:28 +00:00
Julian Elischer
71fad9fdee Completely redo thread states.
Reviewed by:	davidxu@freebsd.org
2002-09-11 08:13:56 +00:00
Seigo Tanimura
b1f99ebe2b - Do not swap out a process if it is in creation. The process may have no
address space yet.

- Check whether a process is a system process prior to dereferencing
  its p_vmspace.  Aio assumes that only the curthread switches the address
  space of a system process.
2002-09-09 09:05:06 +00:00
Julian Elischer
1faf202ea9 Use UMA as a complex object allocator.
The process allocator now caches and hands out complete process structures
*including substructures* .

i.e. it get's the process structure with the first thread (and soon KSE)
already allocated and attached, all in one hit.

For the average non threaded program (non KSE that is) the allocated thread and its stack remain attached to the process, even when the process is
unused and in the process cache. This saves having to allocate and attach it
later, effectively bringing us (hopefully) close to the efficiency
of pre-KSE systems where these were a single structure.

Reviewed by:	davidxu@freebsd.org, peter@freebsd.org
2002-09-06 07:00:37 +00:00
Bruce Evans
6af7f1e511 Use `struct uma_zone *' instead of uma_zone_t, so that <sys/uma.h> isn't
a prerequisite.
2002-09-05 14:04:34 +00:00
David Xu
1279572a92 s/SGNL/SIG/
s/SNGL/SINGLE/
s/SNGLE/SINGLE/

Fix abbreviation for P_STOPPED_* etc flags, in original code they were
inconsistent and difficult to distinguish between them.

Approved by: julian (mentor)
2002-09-05 07:30:18 +00:00
Alan Cox
8a59b15cd4 o Synchronize updates to struct vm_page::cow with the page queues lock. 2002-09-02 04:04:12 +00:00
Matthew Dillon
ec61f55d42 Reduce the maximum KVA reserved for swap meta structures from 70 to 32 MB.
Reduce the swap meta calculation by a factor of 2, it's still massive overkill.

X-MFC after: immediately
2002-08-31 21:15:29 +00:00
Peter Wemm
447b3772dc Change hw.physmem and hw.usermem to unsigned long like they used to be
in the original hardwired sysctl implementation.

The buf size calculator still overflows an integer on machines with large
KVA (eg: ia64) where the number of pages does not fit into an int.  Use
'long' there.

Change Maxmem and physmem and related variables to 'long', mostly for
completeness.  Machines are not likely to overflow 'int' pages in the
near term, but then again, 640K ought to be enough for anybody.  This
comes for free on 32 bit machines, so why not?
2002-08-30 04:04:37 +00:00
Alan Cox
6508a194aa o Retire pmap_pageable(). It's an advisory routine that none
of our platforms implements.
2002-08-25 04:20:05 +00:00
Alan Cox
fff6062ab6 o Retire vm_page_zero_fill() and vm_page_zero_fill_area(). Ever since
pmap_zero_page() and pmap_zero_page_area() were modified to accept
   a struct vm_page * instead of a physical address, vm_page_zero_fill()
   and vm_page_zero_fill_area() have served no purpose.
2002-08-25 00:22:31 +00:00
Alan Cox
15c176c119 o Use vm_object_lock() in place of directly locking Giant.
Reviewed by:	md5
2002-08-24 18:44:52 +00:00
Alan Cox
4eaa117956 o Use vm_object_lock() in place of Giant when manipulating a vm object
in vm_map_insert().
2002-08-24 17:52:08 +00:00
Alan Cox
d52bc3438c o Resurrect vm_object_lock() and vm_object_unlock() from revision 1.19.
(For now, they simply acquire and release Giant.)
2002-08-24 07:15:14 +00:00
Archie Cobbs
55f7c614fd Don't use "NULL" when "0" is really meant. 2002-08-21 23:39:52 +00:00
Alan Cox
60582cbe6d o Assert that the page queues lock is held in vm_page_activate(). 2002-08-11 00:21:40 +00:00
Alan Cox
99cb3c4c0f o Lock page queue accesses by vm_page_activate(). 2002-08-11 00:14:10 +00:00
Alan Cox
67ef391e00 o Lock page queue accesses by vm_page_activate(). 2002-08-10 23:53:59 +00:00
Alan Cox
a9911f9a0f o Move a call to vm_page_wakeup() inside the scope of the page queues lock. 2002-08-10 23:27:06 +00:00
Alan Cox
38f612e053 o Remove the setting and clearing of the PG_MAPPED flag from the alpha and
ia64 pmap.
 o Remove the PG_MAPPED flag's declaration.
2002-08-10 18:01:39 +00:00
Alan Cox
db44450b11 o Remove the setting and clearing of the PG_MAPPED flag. (This flag is
obsolete.)
2002-08-10 07:11:16 +00:00
Alan Cox
06ec58b740 o Use pmap_page_is_mapped() in vm_page_protect() rather than the PG_MAPPED
flag.  (This is the only place in the entire kernel where the PG_MAPPED
   flag is tested.  It will be removed soon.)
2002-08-08 19:12:36 +00:00
Alan Cox
24c28f1ad6 o Acquire the page queues lock before checking the page's busy status
in vm_page_grab().  Also, replace the nearby tsleep() with an msleep()
   on the page queues lock.
2002-08-04 19:05:20 +00:00
Jeff Roberson
e6e370a7fe - Replace v_flag with v_iflag and v_vflag
- v_vflag is protected by the vnode lock and is used when synchronization
   with VOP calls is needed.
 - v_iflag is protected by interlock and is used for dealing with vnode
   management issues.  These flags include X/O LOCK, FREE, DOOMED, etc.
 - All accesses to v_iflag and v_vflag have either been locked or marked with
   mp_fixme's.
 - Many ASSERT_VOP_LOCKED calls have been added where the locking was not
   clear.
 - Many functions in vfs_subr.c were restructured to provide for stronger
   locking.

Idea stolen from:	BSD/OS
2002-08-04 10:29:36 +00:00
Alan Cox
7f0bf36a2e o Extend the scope of the page queues lock in contigmalloc1().
o Replace vm_page_sleep_busy() with vm_page_sleep_if_busy()
   in vm_contig_launder().
2002-08-04 07:07:34 +00:00
Alan Cox
aa9b1d9412 o Remove the setting of PG_MAPPED from vm_page_wire() and
vm_page_alloc(VM_ALLOC_WIRED).
2002-08-03 01:29:52 +00:00
Alan Cox
00f9e8b421 o Convert two instances of vm_page_sleep_busy() into vm_page_sleep_if_busy()
with appropriate page queue locking.
2002-08-02 18:55:29 +00:00
Alan Cox
1e7ce68ff4 o Lock page queue accesses in nwfs and smbfs.
o Assert that the page queues lock is held in vm_page_deactivate().
2002-08-02 05:23:58 +00:00
Alan Cox
91bb74a88c o Lock page queue accesses by vm_page_deactivate(). 2002-08-02 03:56:31 +00:00
Alan Cox
46086ddf91 o Acquire the page queues lock before calling vm_page_io_finish().
o Assert that the page queues lock is held in vm_page_io_finish().
2002-08-01 17:57:42 +00:00
Alan Cox
239b5b9707 o Setting PG_MAPPED and PG_WRITEABLE on pages that are mapped and unmapped
by pmap_qenter() and pmap_qremove() is pointless.  In fact, it probably
   leads to unnecessary pmap_page_protect() calls if one of these pages is
   paged out after unwiring.

Note: setting PG_MAPPED asserts that the page's pv list may be
non-empty.  Since checking the status of the page's pv list isn't any
harder than checking this flag, the flag should probably be eliminated.
Alternatively, PG_MAPPED could be set by pmap_enter() exclusively
rather than various places throughout the kernel.
2002-07-31 18:46:47 +00:00
Alan Cox
67c1fae92e o Lock page accesses by vm_page_io_start() with the page queues lock.
o Assert that the page queues lock is held in vm_page_io_start().
2002-07-31 07:27:08 +00:00
Alan Cox
32585dd617 o In vm_object_madvise() and vm_object_page_remove() replace
vm_page_sleep_busy() with vm_page_sleep_if_busy().  At the same time,
   increase the scope of the page queues lock.  (This should significantly
   reduce the locking overhead in vm_object_page_remove().)
 o Apply some style fixes.
2002-07-30 07:23:04 +00:00
Seigo Tanimura
9eb881f804 - Optimize wakeup() and its friends; if a thread waken up is being
swapped in, we do not have to ask for the scheduler thread to do
  that.

- Assert that a process is not swapped out in runq functions and
  swapout().

- Introduce thread_safetoswapout() for readability.

- In swapout_procs(), perform a test that may block (check of a
  thread working on its vm map) first.  This lets us call swapout()
  with the sched_lock held, providing a better atomicity.
2002-07-30 06:54:05 +00:00
Alan Cox
e5f8bd9418 o Introduce vm_page_sleep_if_busy() as an eventual replacement for
vm_page_sleep_busy().  vm_page_sleep_if_busy() uses the page
   queues lock.
2002-07-29 19:41:22 +00:00
Julian Elischer
b7f2cf173e Remove a XXXKSE comment. the code is no longer a problem.. 2002-07-29 18:47:19 +00:00
Julian Elischer
1d7b9ed2e6 Create a new thread state to describe threads that would be ready to run
except for the fact tha they are presently swapped out. Also add a process
flag to indicate that the process has started the struggle to swap
back in. This will be  needed for the case where multiple threads
start the swapin action top a collision. Also add code to stop
a process fropm being swapped out if one of the threads in this
process is actually off running on another CPU.. that might hurt...

Submitted by:	Seigo Tanimura <tanimura@r.dl.itc.u-tokyo.ac.jp>
2002-07-29 18:33:32 +00:00