Commit Graph

93 Commits

Author SHA1 Message Date
thorpej 8325d058bf Implement uvm_km_{alloc,free}_poolpage(). These functions use pmap hooks to
map/unmap pool pages if provided by the pmap layer.
1998-07-24 20:28:48 +00:00
thorpej 7d8833a179 Put back swap_data_lock, which was apparently deleted accidentally during
the last round of changes.  (I noticed it because I run my kernels w/
LOCKDEBUG.)
1998-07-24 18:46:02 +00:00
pk 363f729ada Use memory pools to allocate swap buffers. Allocations are all dynamic;
in particular `nswbuf' is gone, as is the private "struct buf" list that
was previously maintained in here.
1998-07-23 20:51:09 +00:00
pk 20f05a4bb5 Include pool_drain() in page scans. 1998-07-23 20:36:09 +00:00
pk f640e832b1 Make sure to release buffers only once. 1998-07-08 18:41:24 +00:00
thorpej 7fd701e0fa Add support for multiple memory free lists. There is at least one
default free list, and 0 - N additional free list, in order of descending
priority.

A new page allocation function, uvm_pagealloc_strat(), has been added,
providing three page allocation strategies:

	- normal: high -> low priority free list walk, taking the
	  page off the first free list that has one.

	- only: attempt to allocate a page only from the specified free
	  list, failing if that free list has none available.

	- fallback: if `only' fails, fall back on `normal'.

uvm_pagealloc(...) is provided for normal use (and is a synonym for
uvm_pagealloc_strat(..., UVM_PGA_STRAT_NORMAL, 0); the free list argument
is ignored for the `normal' case).

uvm_page_physload() now specified which free list the pages will be
loaded onto.  This means that some platforms which have multiple physical
memory segments may define additional vm_physsegs if they wish to break
individual physical segments into differing priorities.

Machine-dependent code must define _at least_ the following constants
in <machine/vmparam.h>:

	VM_NFREELIST: the number of free lists the system will have

	VM_FREELIST_DEFAULT: the default freelist (should always be 0,
	but is defined in machdep code so that it's with all of the
	other free list-related constants).

Additional free list names may be defined by machine-dependent code, but
they will only be used by machine-dependent code (e.g. for loading the
vm_physsegs).
1998-07-08 04:28:27 +00:00
thorpej 8d986de632 Add support for mmap'ing disk block devices. 1998-07-07 23:22:13 +00:00
jonathan 466e784ee1 defopt DDB. 1998-07-04 22:18:13 +00:00
pk 3d29b1e56c Shield `#include opt_*.h'. 1998-07-04 08:44:04 +00:00
sommerfe 7ba7fbbb23 Always include fifos; "not an option any more". 1998-06-24 20:58:44 +00:00
sommerfe becaafeea0 defopt for options FIFO 1998-06-22 22:00:59 +00:00
mrg f63fe467c9 Add new history grovelling function uvm_hist() that takes a bitmask of
histories to merge in cronological order.  currently, MAPHIST and
PDHIST are defined as 1 and 2 respectively.  passing a bitmask of 0
to uvm_hist() will dump all maps.
1998-06-20 13:19:00 +00:00
mrg f51ed1e3f8 add a "<-done!" log 1998-06-20 13:16:29 +00:00
ross ebcb47db53 Correct an expression that tried to compute the swap size in bytes using
an int object, this sometimes prevented swap_on() of a dev/file > 2^31 bytes.
1998-06-17 07:38:28 +00:00
cgd 651b44e211 Rework the way kernel include files are installed. In the new method,
as with user-land programs, include files are installed by each directory
in the tree that has includes to install.  (This allows more flexibility
as to what gets installed, makes 'partial installs' easier, and gives us
more options as to which machines' includes get installed at any given
time.)  The old SYS_INCLUDES={symlinks,copies} behaviours are _both_
still supported, though at least one bug in the 'symlinks' case is
fixed by this change.  Include files can't be build before installation,
so directories that have includes as targets (e.g. dev/pci) have to move
those targets into a different Makefile.
1998-06-12 23:22:30 +00:00
chs a5550009e6 correct counting for uvmexp.wired:
only pages explicitly wired by a user process should be counted.
1998-06-09 05:18:52 +00:00
mark 7689b22688 Use the sparc's GCC lossage fix for the arm32 port as well. Problem appears
to be a compiler bug resulting in an 'variable possibly used uninitialised'
warning when optimisation is used.
1998-06-02 20:51:24 +00:00
kleink bb7e6a0bdd Per XSH98, const'ify the `addr' arguments to mlock() and munlock(). 1998-05-30 22:21:03 +00:00
chuck 07c8bdc65f unstatic uvm_page_physload so pmap modules can use it too.
as requested by Eduardo E. Horvath
1998-05-28 15:31:31 +00:00
chuck 08a4f7fa4c fix bug in uvm_map_extract, remove case. make sure we update the loop
variable before removing the entry from the map.
[bug was not causing problems because the remove case isn't currently
 being used ...]
1998-05-22 02:01:54 +00:00
thorpej ad7a87400a defopt LOCKDEBUG 1998-05-20 01:32:29 +00:00
pk df238837b0 No dummy locks if LOCKDEBUG. 1998-05-18 15:00:50 +00:00
chuck d6fddd553f detect ending VA wrap-around in the chunking code of amap_copy.
fixes problem reported by Ken Nakata <kenn@synap.ne.jp> on the mac68k
where the stack amap chunking caused entry->end to wrap around to zero,
thus corrupting the map entry list and causing kmem_map to fill.
1998-05-14 13:51:28 +00:00
mrg 6b11eea5b2 reject attempts to map an immutable or append-only file, shared with
write protection.  this stops data corruption where it was possible
to change the in-memory copy of an append-only file (but not the on-disk
copy).  this is documented in NetBSD security advisory 1998-003.  thanks
to darrenr, lukem, cgd, mycroft and mrg for this.
1998-05-10 12:35:58 +00:00
kleink 6fa43ba824 Minor KNF. 1998-05-09 15:05:50 +00:00
kleink afeaa5bb57 Use size_t to pass the length of the memory region to operate on to chgkprot(),
kernacc(), useracc(), vslock() and vsunlock(); (unsigned) ints are not
adequate on all platforms.
1998-05-09 15:04:39 +00:00
kleink d9066c40e9 Make uvm_vsunlock() actually use the proc * passed to it; per discussion
with Jason Thorpe.
1998-05-08 17:41:41 +00:00
kleink 182e12f413 Remove inclusions of syscall (and syscall argument) related header files;
we don't need them here.
1998-05-05 20:51:04 +00:00
mrg dae55b7b7b fix a problem with swapping to files where a new variable introduced was not
later incremented correctedly, causing the wrong data to be paged out, which
then caused general lossage later when the data was paged in and the process
tried to use it.  found by pk.
1998-05-01 01:40:02 +00:00
thorpej 73863dd3c9 Pass vslock() and vsunlock() a proc *, rather than implicitly operating
on curproc.
1998-04-30 06:28:57 +00:00
matthias fceafcf990 port-pc532 now has pmap_new just like port-i386. 1998-04-25 19:58:58 +00:00
thorpej 339c715a9e Fix small whitespace botch. 1998-04-16 03:54:35 +00:00
thorpej fe97b1da8e Oops, fix a typo. 1998-04-09 00:24:05 +00:00
thorpej 2018d40811 Allocate kernel virtual address space for the U-area before allocating
the new proc structure when performing a fork.  This makes it much
easier to abort a fork operation and return an error if we run out
of KVA space.

The U-area pages are still wired down in {,u}vm_fork(), as before.
1998-04-09 00:23:38 +00:00
tv 39b4c2fece mmap() default MAP_SHARED/MAP_PRIVATE is ``DEBUG'', not ``DIAGNOSTIC'' 1998-04-01 21:43:52 +00:00
chuck 9eb2927bec free correct page in incomplete section of MNN, as pointed
out by Soren S. Jorvang.
1998-03-31 03:04:59 +00:00
chuck fe4846acdc have ddb show map print resident page count 1998-03-30 17:34:58 +00:00
mycroft 0652b9af01 Mark scheduler() and uvm_scheduler() as never returning. 1998-03-30 06:24:42 +00:00
kleink 6618749e5a Per XPG, if the file descriptor argument to mmap() refers to a file whose
type is not supported (neither VREG nor VCHR, or not a vnode at all), fail
with ENODEV instead of EINVAL.
1998-03-28 16:58:04 +00:00
thorpej b65c510879 Split uvmspace_alloc() into uvmspace_alloc() and uvmspace_init(). The latter
can be used for initializing a pre-allocated vmspace.
1998-03-27 01:47:06 +00:00
chuck db81cc9c76 update per-process rusage fault counters (ru_majflt/ru_minflt) under UVM 1998-03-26 21:50:14 +00:00
chuck e6da5a01e4 remove tmpwire arg from uvm_pagewire() -- it isn't needed anymore.
noted by chuck s.
1998-03-22 21:29:30 +00:00
chuck 617118bccc fix released pg bugs detected by Chuck S.:
- release the correct page (ppsp[lcv], not pg)
 - don't access the page's fields after we have released it
 - in the uvm_objct case: move on to the next page if we've released
[should have been merged in on 1998/02/12, but we somehow missed it]
1998-03-22 16:10:29 +00:00
chuck dd370f11a3 rework the copy inheritance case of fork. the old way did not handle
the very rare case of shared mappings that have amap's attached in a
reasonable way -- this is not currently causing any problems, but i
fixed it anyway.  update the comment in this section of code and also
be smarter about avoiding needless calls to pmap_protect().
1998-03-19 19:26:50 +00:00
thorpej dbc7bbee68 Make the previous change `atomic'. 1998-03-19 06:37:26 +00:00
thorpej daade671ae When unsharing or execing, deactivate the old vmspace before reassigning
and activating the new one.  Pointed out by Chris Demetriou.
1998-03-19 04:19:21 +00:00
mrg be92b169f8 oops, missed a bit of KNF here. 1998-03-17 07:50:08 +00:00
chuck 927ec8b012 bug fix: when doing uvm_vnp_sync() actually skip over blocked uvn's so
that we don't try and sync them later.   should get rid of the
"uvm_vnp_sync: dying vnode on sync list" related warnings that were
occuring during a "make install."
1998-03-11 01:37:40 +00:00
chuck 21624aaf72 uvm_dump now dumps some important pointers for debugging 1998-03-10 14:36:55 +00:00
mrg 8106d13596 KNF. 1998-03-09 00:58:55 +00:00