Commit Graph

94950 Commits

Author SHA1 Message Date
joe
7241c9b300 Make it easier to run this code on RELENG_4.
Submitted by:	luoqi
2003-10-04 21:41:01 +00:00
alc
3272fbe303 Synchronize access to a vm page's valid field using the containing
vm object's lock.
2003-10-04 21:35:48 +00:00
alc
96e57c74e6 Synchronize access to a vm page's valid field using the containing
vm object's lock.
2003-10-04 20:38:32 +00:00
alc
7c11eaebac - Extend the scope the vm object lock to cover calls to
vm_page_is_valid().
 - Assert that the lock on the containing vm object is held in
   vm_page_is_valid().
2003-10-04 19:23:29 +00:00
alc
fa0f25a359 Synchronize access to a vm page's valid field using the containing
vm object's lock.
2003-10-04 19:13:27 +00:00
ru
0f6892a7db Retired the "most" and "installmost" targets -- they just
do not have a chance to work nowadays as we have a lot of
internal libraries in lib/.

Discussed with:	marcel, wollman
2003-10-04 18:53:38 +00:00
imp
bd85d420ce any -> ? for new entry (to allow time for people to upgrade their pccardd) 2003-10-04 18:44:29 +00:00
imp
a59ed65152 Ooops. Committed sin number 1: updating the code w/o updating the comments.
Update the comments too.
2003-10-04 18:43:21 +00:00
imp
786346d191 I've been burned about half a dozen times by the old PAO syntax for
'any' interrupt.  There's no reason not to be liberal here and accept
the PAO syntax.

MFC After: 2 weeks
2003-10-04 18:40:36 +00:00
jeff
55547647ec - In sched_sync() test our preconditions prior to dropping the sync_mtx.
This is so that we may grab the interlock while still holding the
   sync_mtx.  We have to VI_TRYLOCK() because in all other cases the lock
   order runs the other way.
 - If we don't meet any of the preconditions, reinsert the vp into the
   list for the next second.
 - We don't need to panic if we fail to sync here because each FSYNC
   function handles this case.  Removing this redundant code also
   simplifies locking.
2003-10-04 18:03:53 +00:00
jeff
daf0443857 - Consistently set sopt_dir.
Pointed out by:		pete@isilon.com
2003-10-04 17:41:59 +00:00
jeff
1fc4867692 - Change a lame iterative algorithm to a constant time algorithm. Remove
the XXX that complains about it as well.

Submitted by:	ThomasWuerfl@gmx.de
2003-10-04 17:41:13 +00:00
jeff
9d218b6014 - Set the sopt_dir member of the sockopt structure, otherwise, this parameter
will not actually be set even though we're calling sosetopt.  sosetopt
   calls down to a single ctloutput function if the name or level is
   implemented by a specific protocol.

Submitted by:	pete@isilon.com
2003-10-04 17:37:51 +00:00
jeff
420cf70112 - Don't use vrecycle() call vgonel() directly after grabing the vnode
interlock.  We do this so that we still hold the interlock when we lock
   the vnode later.  This prevents races with the mnt vnode list.
2003-10-04 16:09:40 +00:00
jeff
8de9c70cc9 - The VI assert in getdirtybuf() is only valid if we're not on a VCHR
vnode.  VCHR vnodes don't do background writes.

Reported by:	kan
2003-10-04 15:57:05 +00:00
naddy
19aefac66e missing word 2003-10-04 15:43:22 +00:00
yar
5544eb2c6a Assorted minor fixes, mostly style(9):
- PID should be pid_t, not int;
- sort #include's and local variables;
- don't overuse initializers;
- use warn(3) instead of perror(3) consistently;
- amplify the comment on signals.
2003-10-04 15:17:08 +00:00
jeff
bb40013912 - In a Giantless world, the vn_lock() in vcanrecycle() could legitimately
fail.  Remove the panic from that case and document why it might fail.
 - Document the reason for calling cache_purge() on a newly created vnode.
 - In insmntque() order the operations so that we can call mtx_unlock()
   one fewer times.  This makes the code somewhat clearer as well.
 - Add XXX comments in sched_sync() and vflush().
 - In vget(), do not sleep while waiting for XLOCK to clear if LK_NOWAIT is
   set.
 - In vclean() we don't need to acquire a lock around a single TAILQ_FIRST
   call.  It's ok if we race here, the vinvalbuf will just do nothing.
 - Increase the scope of the lock in vgonel() to reduce the number of lock
   operations that are performed.
2003-10-04 15:10:40 +00:00
naddy
90026c2cfc reference ntpd(8) 2003-10-04 15:07:27 +00:00
yar
8d8c161949 Don't dump core from the time(1) process itself
if the child process has exited on a signal
whose default action is to dump core.
2003-10-04 14:42:03 +00:00
jeff
c1590e8666 - If we are called with LK_NOWAIT in vn_lock() we may be holding a mutex
and should not sleep while waiting for XLOCK to clear.  Care needs to be
   taken in functions that use this capability to avoid spinning.
2003-10-04 14:35:22 +00:00
jeff
d5b67ded6e - Document more of the vnode locking strategy. 2003-10-04 14:32:55 +00:00
jeff
563642084e - Increase the scope of the interlock in ffs_reload(). Acquire it before
we release the mntvnode_mtx.
 - Call vgonel() directly instead of going through vrecycle() since we own
   the interlock now.
 - Remove a few cases where we locked the interlock just so that we could
   call VOP_UNLOCK with interlock held.
2003-10-04 14:27:49 +00:00
jeff
c960cfdda5 - Fix an unlocked call to GETATTR by slightly shuffling the code in
ffs_snapshot() around.
 - Acquire the interlock before releasing the mntvnode_mtx.  Use the
   interlock to protect v_usecount access.
2003-10-04 14:25:45 +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
jeff
9dd2ea10ce - Use the VI_LOCK macro in two places where we directly called mtx_lock()
before.  Direct calls indicated places that needed review and these have
   now been reviewed.
2003-10-04 14:03:28 +00:00
jeff
9f8537dbfe - Properly acquire the vnode interlock before releasing the
mntvnode_mtx.
 - Use a local variable to store the results of the test to see if the
   next vnode on the mount list has changed.  This is so that we no longer
   acess the vnode after we vput() it.
2003-10-04 14:02:32 +00:00
jeff
46f6642c5b - Acquire the vnode interlock prior to dropping the mntvnode_mtx.
- Make a note of the lack of XLOCK protection in this code.  We would access
   a vnode while it is changing identities without Giant.
2003-10-04 13:44:51 +00:00
jeff
c95a875344 - Make proper use of the mntvnode_mtx. We do not need the loop label
because we do not drop the mntvnode_mtx.  If this code had ever executed
   and hit the loop condition it would have spun forever.
2003-10-04 13:16:54 +00:00
jeff
ad0c897bd5 - The proper test is CPU_ENABLE_SSE and not CPU_ENABLED_SSE. This
effectively disabled the sse2_pagezero() code.

Spotted by:	bde
2003-10-04 13:07:53 +00:00
jeff
449c7a515c - Acquire the vnode interlock prior to droping the mntvnode_mtx. This does
not eliminate races where the vnode could be reclaimed and end up with
   a NULL v_data pointer but Giant is protecting us from that at the moment.
2003-10-04 12:52:37 +00:00
jeff
b8e79e62d0 - Remove a mp_fixme() and some locks that weren't necessary. I now
understand how this works.
2003-10-04 11:06:43 +00:00
alc
ab85e7e065 Synchronize access to a page's valid field by using the lock from its
containing object.
2003-10-04 09:20:00 +00:00
jeff
849854f240 - Remove the backtrace() call from the *_vinvalbuf() functions. Thanks to a
stack trace supplied by phk, I now understand what's going on here.  The
   check for VI_XLOCK stops us from calling vinvalbuf once the vnode has been
   partially torn down in vclean().  It is not clear that this would cause
   a problem.  Document this in nfs_bio.c, which is where the other two
   filesystems copied this code from.
2003-10-04 08:51:50 +00:00
dds
bf121d8ed4 Check for write errors; report and exit with error value. 2003-10-04 07:16:40 +00:00
peter
ac3fcecc22 Emulate bugs in the old PSE code so that apm works again.
I do not yet understand why, but apm *depended* on the fact that the old
PSE code caused the first 1MB of ram to be mapped read/write because it
was in the same 4MB page as the kernel text+data+bss blob.

If anybody ever tried DISABLE_PSE before, apm would not work.

If your cpu did not have PSE, apm would not work there either (eg: 486).

This bug has been around for a Very Long Time.

The Pentium-4-fix commits did not emulate this unintended side effect of
the PSE post-early-boot fixup, and thus apm blew up.  I've added a hack to
emulate the bug until either apm is fixed or we set fire to our bridges.

This is bad though because it gives kernel mode code the opportunity
to accidently write to the first few megs of the general page pool
which is remapped at KERNBASE.  It needs to be fixed properly.
2003-10-04 06:30:56 +00:00
sam
9d93fce265 Locking for updates to routing table entries. Each rtentry gets a mutex
that covers updates to the contents.  Note this is separate from holding
a reference and/or locking the routing table itself.

Other/related changes:

o rtredirect loses the final parameter by which an rtentry reference
  may be returned; this was never used and added unwarranted complexity
  for locking.
o minor style cleanups to routing code (e.g. ansi-fy function decls)
o remove the logic to bump the refcnt on the parent of cloned routes,
  we assume the parent will remain as long as the clone; doing this avoids
  a circularity in locking during delete
o convert some timeouts to MPSAFE callouts

Notes:

1. rt_mtx in struct rtentry is guarded by #ifdef _KERNEL as user-level
   applications cannot/do-no know about mutex's.  Doing this requires
   that the mutex be the last element in the structure.  A better solution
   is to introduce an externalized version of struct rtentry but this is
   a major task because of the intertwining of rtentry and other data
   structures that are visible to user applications.
2. There are known LOR's that are expected to go away with forthcoming
   work to eliminate many held references.  If not these will be resolved
   prior to release.
3. ATM changes are untested.

Sponsored by:	FreeBSD Foundation
Obtained from:	BSD/OS (partly)
2003-10-04 03:44:50 +00:00
gad
420e260964 Handle a 'const' parameter without using __DECONST().
MFC after:	14 days
2003-10-04 02:24:47 +00:00
sam
ba561864b3 add a stub for bpfattach2 so bpf is not required with the 802.11
module or related drivers

Spotted by:	Dan Lukes <dan@obluda.cz>
2003-10-04 01:32:28 +00:00
bms
6867e2e410 Remove the pmap_prefault(9) page as it is no longer required. 2003-10-04 01:32:25 +00:00
bms
4ea755a59d Update the pmap(9) documentation to reflect the movement of pmap_prefault()
to the machine-independent VM layer, as per alc's recent commit.
Add a definition for the new pmap_is_prefaultable() helper function.
2003-10-04 01:30:01 +00:00
alc
b1691aebe4 Migrate pmap_prefault() into the machine-independent virtual memory layer.
A small helper function pmap_is_prefaultable() is added.  This function
encapsulate the few lines of pmap_prefault() that actually vary from
machine to machine.  Note: pmap_is_prefaultable() and pmap_mincore() have
much in common.  Going forward, it's worth considering their merger.
2003-10-03 22:46:53 +00:00
sam
678d7d9378 hookup ctlinput for fast ipsec versions of esp+ah protocols
Supported by:	FreeBSD Foundation
2003-10-03 22:06:36 +00:00
imp
293cc5856c While make has been fixed to grok this construct, the new make hasn't
been widely deploy and that's causing us a lot of pain.  Back out the
last commit for a few weeks so that we can lessen the support load in
current@ asking why they can't build kernels anymore.  Instructions in
UPDATING have been updated, but this should be more effective.

Revert the reverting: November 1st, 2003
2003-10-03 22:00:06 +00:00
phk
150fde5f5c Default ntpd to write a "driftfile" in /var/db/ntpd.drift.
A "driftfile" caches the oscillator offset estimate from boot to boot,
having this means faster and less bumpy time synchronization.  Will
be overridden by any value in the config file.
2003-10-03 21:33:40 +00:00
ru
77a7296c2f Make the -q option DTRT in the compat mode.
PR:	48210
2003-10-03 21:33:39 +00:00
sam
3a8a0128c5 remove unused variable
Supported by:	FreeBSD Foundation
2003-10-03 21:06:17 +00:00
sam
f2e2530446 remove unneeded include of route.h
Supported by:	FreeBSD Foundation
2003-10-03 21:05:08 +00:00
sam
7e54937ddb remove include of route.h now that ip_dummynet.h no longer exposes
data structures that have an embedded struct route

Sponsored by:	FreeBSD Foundation
2003-10-03 21:01:48 +00:00
sam
2b3514a20c place some kernel-specific data structures under #ifdef _KERNEL
Sponsored by:	FreeBSD Foundation
2003-10-03 20:58:56 +00:00