Commit Graph

488 Commits

Author SHA1 Message Date
Poul-Henning Kamp
a1c995b626 Last major round (Unless Bruce thinks of somthing :-) of malloc changes.
Distribute all but the most fundamental malloc types.  This time I also
remembered the trick to making things static:  Put "static" in front of
them.

A couple of finer points by:	bde
1997-10-12 20:26:33 +00:00
Poul-Henning Kamp
55166637cd Distribute and statizice a lot of the malloc M_* types.
Substantial input from:	bde
1997-10-11 18:31:40 +00:00
Peter Wemm
3820ec1d4d Attempt to fix the previous fix to the contigmalloc1 prototype.
struct malloc_type isn't defined in all cases (eg: from ddb), and the line
wrapping was very badly mangled.
1997-10-11 10:39:19 +00:00
Poul-Henning Kamp
f0d45e6aae Fix contigmalloc() and contigmalloc1() arguments. 1997-10-10 18:18:47 +00:00
John Dyson
7e00649986 Improve management of pages moving from the inactive to active queue. Additionally,
add some much needed comments.
1997-10-06 02:48:16 +00:00
John Dyson
e7b0208f61 Relax the vnode locking for read only operations. 1997-10-06 02:38:30 +00:00
Peter Wemm
af866d9a23 Fix some style(9) and formatting problems. tabsize 4 formatting doesn't
look too great with 'more' etc.

Approved by: dyson (with a minor grumble :-)
1997-09-21 11:41:12 +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
Peter Wemm
35b8b2ddab Update select -> poll in drivers. 1997-09-14 03:19:42 +00:00
Peter Wemm
f8ddc1e209 Print correct function name in panics 1997-09-13 15:04:52 +00:00
Jonathan Lemon
987b847efc Do not consider VM_PROT_OVERRIDE_WRITE to be part of the protection
entry when handling a fault.  This is set by procfs whenever it wants
to write to a page, as a means of overriding `r-x COW' entries, but
causes failures in the `rwx' case.

Submitted by:	 bde
1997-09-12 15:58:47 +00:00
Bruce Evans
41fadeeb28 Removed yet more vestiges of config-time swap configuration and/or
cleaned up nearby cruft.
1997-09-07 16:21:11 +00:00
Bruce Evans
79624e2147 Removed unused #includes. 1997-09-01 03:17:34 +00:00
Bruce Evans
4de628dec4 Some staticized variables were still declared to be extern. 1997-09-01 02:55:50 +00:00
Bruce Evans
dfeca1b8ae Print a device number in hex instead of decimal. 1997-09-01 02:28:32 +00:00
Poul-Henning Kamp
a051452ae2 Change the 0xdeadb hack to a flag called VDOOMED.
Introduce VFREE which indicates that vnode is on freelist.
Rename vholdrele() to vdrop().
Create vfree() and vbusy() to add/delete vnode from freelist.
Add vfree()/vbusy() to keep (v_holdcnt != 0 || v_usecount != 0)
  vnodes off the freelist.
Generalize vhold()/v_holdcnt to mean "do not recycle".
Fix reassignbuf()s lack of use of vhold().
Use vhold() instead of checking v_cache_src list.
Remove vtouch(), the vnodes are always vget'ed soon enough
  after for it to have any measuable effect.
Add sysctl debug.freevnodes to keep track of things.
Move cache_purge() up in getnewvnodes to avoid race.
Decrement v_usecount after VOP_INACTIVE(), put a vhold() on
  it during VOP_INACTIVE()
Unmacroize vhold()/vdrop()
Print out VDOOMED and VFREE flags (XXX: should use %b)

Reviewed by:		dyson
1997-08-31 07:32:39 +00:00
Peter Wemm
54f42e4ba0 Allow non-page aligned file offset mmap's, providing that the system is
allowed to choose the address, or that the MAP_FIXED address has the same
remainder when modulo PAGE_SIZE as the file offset.  Apparently this is
posix1003.1b specified behavior.  SVR4 and the other *BSD's allow it too.
It costs us nothing to support and means we don't get EINVAL on some mmap
code that works perfectly elsewhere.

Obtained from: NetBSD
1997-08-30 18:50:06 +00:00
Bruce Evans
b9dcd593ff Fixed type mismatches for functions with args of type vm_prot_t and/or
vm_inherit_t.  These types are smaller than ints, so the prototypes
should have used the promoted type (int) to match the old-style function
definitions.  They use just vm_prot_t and/or vm_inherit_t.  This depends
on gcc features to work.  I fixed the definitions since this is easiest.
The correct fix may be to change the small types to u_int, to optimize
for time instead of space.
1997-08-25 22:15:31 +00:00
John Dyson
89721f6f1a This is a trial improvement for the vnode reference count while on the vnode
free list problem.  Also, the vnode age flag is no longer used by the
vnode pager.  (It is actually incorrect to use then.)  Constructive
feedback welcome -- just be kind.
1997-08-22 03:56:37 +00:00
Bruce Evans
b1037dcd53 #include <machine/limits.h> explicitly in the few places that it is required. 1997-08-21 20:33:42 +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
John Dyson
1c5ff0a712 The "cutsie" register parameter passing that I had mistakenly used breaks
profiling.  Since it doesn't really improve perf much, I have backed it
out.
1997-08-10 00:12:13 +00:00
John Dyson
f1c1c5b5a4 More vm_zone cleanup. The sysctl now accounts for items better, and
counts the number of allocations.
1997-08-07 03:52:55 +00:00
John Dyson
507b10b48c Add exposure of some vm_zone allocation stats by sysctl. Also, change
the initialization parameters of some zones in VM map.  This contains
only optimizations and not bugfixes.
1997-08-06 04:58:05 +00:00
John Dyson
ba9be04c72 Fixed the commit botch that was causing crashes soon after system
startup.  Due to the error, the initialization of the zone for
pv_entries was missing.  The system should be usable again.
1997-08-05 23:03:24 +00:00
John Dyson
0d65e566b9 Another attempt at cleaning up the new memory allocator. 1997-08-05 22:24:31 +00:00
John Dyson
b79933ebfa Fix some bugs, document vm_zone better. Add copyright to vm_zone.h. Use
the new zone code in pmap.c so that we can get rid of the ugly ad-hoc
allocations in pmap.c.
1997-08-05 22:07:27 +00:00
John Dyson
f2adc8bb27 Modify pmap to use our new memory allocator. Also, change the vm_map_entry
allocations to be interrupt safe.
1997-08-05 01:32:52 +00:00
John Dyson
565bca977d A very simple zone allocator. 1997-08-05 00:07:31 +00:00
John Dyson
3075778b63 Get rid of the ad-hoc memory allocator for vm_map_entries, in lieu of
a simple, clean zone type allocator.  This new allocator will also be
used for machine dependent pmap PV entries.
1997-08-05 00:02:08 +00:00
Bruce Evans
1fd0b0588f Removed unused #includes. 1997-08-02 14:33:27 +00:00
John Dyson
dc2efb2766 Add the ability for the pageout daemon to measure stats on memory usage before
the system is out of memory.  The daemon does a minimal amount of work that
increases as the system becomes more likely to run out of memory and page in/out.

The default tuning is fairly low in background CPU usage, and sysctl variables
have been added to enable flexable operation.  This is an experimental feature
that will likely be changed and improved over time.
1997-07-27 04:49:19 +00:00
John Dyson
11cccda1de Fix a very subtile problem that causes unnessary numbers of objects backing
a single logical object.
Submitted by:	Alan Cox <alc@cs.rice.edu>
1997-07-27 04:44:12 +00:00
John Dyson
0a0a85b3e0 Add support for 4MB pages. This includes the .text, .data, .data parts
of the kernel, and also most of the dynamic parts of the kernel.  Additionally,
4MB pages will be allocated for display buffers as appropriate (only.)

The 4MB support for SMP isn't complete, but doesn't interfere with operation
either.
1997-07-17 04:34:03 +00:00
Tor Egge
208d433777 Don't try upgrading an existing exclusive lock in vm_map_user_pageable.
This should close PR kern/3180.
Also remove a bogus unconditional call to vm_map_unlock_read in
vm_map_lookup.
1997-06-23 21:51:03 +00:00
Peter Wemm
3b18caba29 Kill some stale leftovers from the earlier attempts at SMP per-cpu pages 1997-06-22 15:47:16 +00:00
John Dyson
3c631446d3 Remove a window during running down a file vnode. Also, the OBJ_DEAD
flag wasn't being respected during vref(), et. al.  Note that this
isn't the eventual fix for the locking problem.  Fine grained SMP
in the VM and VFS code will require (lots) more work.
1997-06-22 03:00:24 +00:00
John Dyson
4a40e3d42f Correct the return code for the mlock system call. Also add the stubs
for mlockall and munlockall.
1997-06-15 23:35:32 +00:00
John Dyson
dbc806e731 Fix a reference problem with maps. Only appears to manifest itself when
sharing address spaces.
1997-06-15 23:33:52 +00:00
Peter Wemm
0228905ae4 Update the #include "opt_smpxxx.h" includes - opt_smp.h isn't needed
very much in the generic parts of the kernel now.
1997-05-29 02:57:22 +00:00
Doug Rabson
32ad9cb531 Fix a few bugs with NFS and mmap caused by NFS' use of b_validoff
and b_validend.  The changes to vfs_bio.c are a bit ugly but hopefully
can be tidied up later by a slight redesign.

PR:		kern/2573, kern/2754, kern/3046 (possibly)
Reviewed by:	dyson
1997-05-19 14:36:56 +00:00
John Dyson
6160099735 Check the correct queue for waking up the pageout daemon. Specifically,
the pageout daemon wasn't always being waken up appropriately when the
(cache + free) queues were depleted.
Submitted by:	David S. Miller <davem@jenolan.rutgers.edu>
1997-05-01 14:36:01 +00:00
Peter Wemm
477a642cee Man the liferafts! Here comes the long awaited SMP -> -current merge!
There are various options documented in i386/conf/LINT, there is more to
come over the next few days.

The kernel should run pretty much "as before" without the options to
activate SMP mode.

There are a handful of known "loose ends" that need to be fixed, but
have been put off since the SMP kernel is in a moderately good condition
at the moment.

This commit is the result of the tinkering and testing over the last 14
months by many people.  A special thanks to Steve Passe for implementing
the APIC code!
1997-04-26 11:46:25 +00:00
Peter Wemm
92da7e012d Send this to the Attic so there's no mixups over which kern_lock.c is in
use in -current.
1997-04-21 13:39:56 +00:00
Peter Wemm
e108835bbc Unused variable (upobj is now purely handled within pmap) 1997-04-14 03:40:42 +00:00
John Dyson
5856e12e69 Fully implement vfork. Vfork is now much much faster than even our
fork. (On my machine, fork is about 240usecs, vfork is 78usecs.)

Implement rfork(!RFPROC !RFMEM), which allows a thread to divorce its memory
	from the other threads of a group.

Implement rfork(!RFPROC RFCFDG), which closes all file descriptors, eliminating
	possible existing shares with other threads/processes.

Implement rfork(!RFPROC RFFDG), which divorces the file descriptors for a
	thread from the rest of the group.

Fix the case where a thread does an exec.  It is almost nonsense for a thread
	to modify the other threads address space by an exec, so we
	now automatically divorce the address space before modifying it.
1997-04-13 01:48:35 +00:00
Peter Wemm
a2a1c95c10 The biggie: Get rid of the UPAGES from the top of the per-process address
space. (!)

Have each process use the kernel stack and pcb in the kvm space.  Since
the stacks are at a different address, we cannot copy the stack at fork()
and allow the child to return up through the function call tree to return
to user mode - create a new execution context and have the new process
begin executing from cpu_switch() and go to user mode directly.
In theory this should speed up fork a bit.

Context switch the tss_esp0 pointer in the common tss.  This is a lot
simpler since than swithching the gdt[GPROC0_SEL].sd.sd_base pointer
to each process's tss since the esp0 pointer is a 32 bit pointer, and the
sd_base setting is split into three different bit sections at non-aligned
boundaries and requires a lot of twiddling to reset.

The 8K of memory at the top of the process space is now empty, and unmapped
(and unmappable, it's higher than VM_MAXUSER_ADDRESS).

Simplity the pmap code to manage process contexts, we no longer have to
double map the UPAGES, this simplifies and should measuably speed up fork().

The following parts came from John Dyson:

Set PG_G on the UPAGES that are now in kernel context, and invalidate
them when swapping them out.

Move the upages object (upobj) from the vmspace to the proc structure.

Now that the UPAGES (pcb and kernel stack) are out of user space, make
rfork(..RFMEM..) do what was intended by sharing the vmspace
entirely via reference counting rather than simply inheriting the mappings.
1997-04-07 07:16:06 +00:00
Peter Wemm
2100d64585 Commit a typo fix that's been sitting in my tree for ages, quite forgotten.
The typo was detected once apon a time with the -Wunused compile option.
The result was that a block of code for implementing
madvise(.. MADV_SEQUENTIAL..) behavior was "dead" and unused, probably
negating the effect of activating the option.

Reviewed by: dyson
1997-04-06 16:16:11 +00:00
John Dyson
7d78abc9d9 Make vm_map_protect be more complete about map simplification. This
is useful when a process changes it's page range protections very
much.
Submitted by:	Alan Cox <alc@cs.rice.edu>
1997-04-06 03:04:31 +00:00