Commit Graph

32 Commits

Author SHA1 Message Date
Poul-Henning Kamp
db5f635acc Eliminate the undocumented, experimental, non-delivering and highly
dangerous MAX_PERF option.
2000-03-16 08:51:55 +00:00
Eivind Eklund
6bdfe06ad9 Lock reporting and assertion changes.
* lockstatus() and VOP_ISLOCKED() gets a new process argument and a new
  return value: LK_EXCLOTHER, when the lock is held exclusively by another
  process.
* The ASSERT_VOP_(UN)LOCKED family is extended to use what this gives them
* Extend the vnode_if.src format to allow more exact specification than
  locked/unlocked.

This commit should not do any semantic changes unless you are using
DEBUG_VFS_LOCKS.

Discussed with:	grog, mch, peter, phk
Reviewed by:	peter
1999-12-11 16:13:02 +00:00
Alan Cox
99c9d3490b Correct a locking error in apause: It should always hold
the simple lock when it returns.

Also, eliminate spinning on a uniprocessor.  It's pointless.

Submitted by:	bde,
		Assar Westerlund <assar@sics.se>
1999-11-11 03:02:03 +00:00
Matthew Dillon
e701df7d61 Fix process p_locks accounting. Conversions of the owner to LK_KERNPROC
caused p_locks to be improperly accounted.

Submitted by:	Tor.Egge@fast.no
1999-09-27 00:21:43 +00:00
Peter Wemm
c3aac50f28 $Id$ -> $FreeBSD$ 1999-08-28 01:08:13 +00:00
Kirk McKusick
33638e9384 When requesting an exclusive lock with LK_NOWAIT, do not panic
if LK_RECURSIVE is not set, as we will simply return that the
lock is busy and not actually deadlock. This allows processes
to use polling locks against buffers that they may already
hold exclusively locked.
1999-06-28 07:54:58 +00:00
Kirk McKusick
67812eacd7 Convert buffer locking from using the B_BUSY and B_WANTED flags to using
lockmgr locks. This commit should be functionally equivalent to the old
semantics. That is, all buffer locking is done with LK_EXCLUSIVE
requests. Changes to take advantage of LK_SHARED and LK_RECURSIVE will
be done in future commits.
1999-06-26 02:47:16 +00:00
Julian Elischer
50d3b68c81 fix breakage for alphas.
Submitted by: Andrew Gallatin <gallatin@cs.duke.edu>
1999-03-15 05:11:27 +00:00
Julian Elischer
beef8a367c This solves a deadlock that can occur when read()ing into a file-mmap()
space. When doing this, it is possible to for another process to attempt
to get an exclusive lock on the vnode and deadlock the mmap/read
combination when the uiomove() call tries to obtain a second
shared lock on the vnode. There is still a potential deadlock
situation with write()/mmap().
Submitted by: Matt Dillon <dillon@freebsd.org>
Reviewed by: Luoqi Chen <luoqi@freebsd.org>
Delimmitted by tag PRE_MATT_MMAP_LOCK and POST_MATT_MMAP_LOCK
in kern/kern_lock.c kern/kern_subr.c
1999-03-12 03:09:29 +00:00
Eivind Eklund
15a1057c46 Add 'options DEBUG_LOCKS', which stores extra information in struct
lock, and add some macros and function parameters to make sure that
the information get to the point where it can be put in the lock
structure.

While I'm here, add DEBUG_VFS_LOCKS to LINT.
1999-01-20 14:49:12 +00:00
Eivind Eklund
219cbf59f2 KNFize, by bde. 1999-01-10 01:58:29 +00:00
Eivind Eklund
5526d2d920 Split DIAGNOSTIC -> DIAGNOSTIC, INVARIANTS, and INVARIANT_SUPPORT as
discussed on -hackers.

Introduce 'KASSERT(assertion, ("panic message", args))' for simple
check + panic.

Reviewed by:	msmith
1999-01-08 17:31:30 +00:00
Eivind Eklund
9fcdafaefc Staticize. 1998-11-26 18:50:24 +00:00
Bruce Evans
ab36c3d3e7 Really finish supporting compiling with `gcc -ansi'. 1998-04-17 04:53:44 +00:00
John Dyson
9b2e5bad34 Some kern_lock code improvements. Add missing wakeup, and enable
disabling some diagnostics when memory or speed is at a premium.
1998-03-07 19:25:34 +00:00
Eivind Eklund
e9fe146bb4 Include SIMPLELOCK_DEBUG functions even if SMP if compiling LINT; give
an error for the combination if _not_ compiling LINT.
1998-02-11 00:05:26 +00:00
Eivind Eklund
0b08f5f737 Back out DIAGNOSTIC changes. 1998-02-06 12:14:30 +00:00
Eivind Eklund
47cfdb166d Turn DIAGNOSTIC into a new-style option. 1998-02-04 22:34:03 +00:00
Poul-Henning Kamp
4a11ca4e29 Remove a bunch of variables which were unused both in GENERIC and LINT.
Found by:	-Wunused
1997-11-07 08:53:44 +00:00
Bruce Evans
55b211e3af Removed unused #includes. 1997-10-28 15:59:26 +00:00
John Dyson
99448ed11d Change the M_NAMEI allocations to use the zone allocator. This change
plus the previous changes to use the zone allocator decrease the useage
of malloc by half.  The Zone allocator will be upgradeable to be able
to use per CPU-pools, and has more intelligent usage of SPLs.  Additionally,
it has reasonable stats gathering capabilities, while making most calls
inline.
1997-09-21 04:24:27 +00:00
Poul-Henning Kamp
0e61ac7b5d typo in comment. 1997-08-22 07:16:46 +00:00
John Dyson
891e0f24c4 Allow lockmgr to work without a current process. Disallowing that
was a mistake in the lockmgr rewrite.
1997-08-19 00:27:07 +00:00
Steve Passe
7cbfd031b6 Added includes of smp.h for SMP.
This eliminates a bazillion warnings about implicit s_lock & friends.
1997-08-18 03:29:21 +00:00
John Dyson
03e9c6c101 Fix kern_lock so that it will work. Additionally, clean-up some of the
VM systems usage of the kernel lock (lockmgr) code.  This is a first
pass implementation, and is expected to evolve as needed.  The API
for the lock manager code has not changed, but the underlying implementation
has changed significantly.  This change should not materially affect
our current SMP or UP code without non-standard parameters being used.
1997-08-18 02:06:35 +00:00
Steve Passe
248fcb669b pushed down "volatility" of simplelock to actual int inside the struct.
Submitted by:	 bde@zeta.org.au, smp@csn.net
1997-08-04 19:11:26 +00:00
Bruce Evans
6898627ce2 Fixed commented-out Lite2 sysctl debug.lockpausetime.
Removed unused #includes.
1997-04-01 10:18:51 +00:00
Peter Wemm
17a8bb9de0 Add missing $Id$
Note; the RCS file has also been reconstructed to have a CSRG vendor branch.
1997-03-25 17:11:30 +00:00
Peter Wemm
356b94e0d3 Replace original rev 1.3; Author: bde; Date: 1997/02/25 17:24:43;
Fix counting of simplelocks in SIMPLELOCK_DEBUG
Fix style regression
1997-03-25 16:38:01 +00:00
Peter Wemm
4bdb9b1168 Replace original rev 1.2; Author: mpp; Date: 1997/02/12 06:52:30
Add missing #include <sys/systm.h>
1997-03-25 16:36:35 +00:00
Peter Wemm
a1ce9d5c33 Replace original revision 1.1; Author dyson; Date: 1997/02/10 02:28:15
Changes from Lite2:
- DEBUG -> SIMPLELOCK_DEBUG
- cosmetic fixes
- bzero of lock at init time -> explicit init of members.
1997-03-25 16:32:46 +00:00
Peter Wemm
53bf4bb2cf Import 4.4BSD-Lite2 onto CSRG branch 1997-03-25 16:27:20 +00:00