Commit Graph

698 Commits

Author SHA1 Message Date
scw 4355b16f71 In uvm_lwp_fork(), check if PMAP_UAREA() is defined and if so, invoke it
with the KVA of the newly-wired uarea.

This is useful on some architectures (e.g. xscale) where the uarea mapping
can be tweaked to use the mini-data cache instead of the main cache.
2003-10-13 20:43:03 +00:00
enami 57a6593f52 Fix indent. 2003-10-09 03:12:29 +00:00
atatat d4de28f890 When pulling back an amap to cover the new allocation along with the
previous entry, don't add the size to the extension -- it's already
been added to the end of the previous entry.
2003-10-09 02:44:54 +00:00
thorpej 8655c7d7eb Add a MAP_WIRED flag to mmap(2), which causes the new mapping to be
wired as if by mlock(2).
2003-10-07 00:17:09 +00:00
enami ae9b5cba84 Rewrite uvm_map_findspace() to improve readability and to fix a bug that
it may return space already in use as free space under some condition.
The symptom of the bug is that exec fails if stack is unlimited on
topdown VM kernel.
2003-10-02 00:02:10 +00:00
enami 0ca733e759 Some whitespace fixes. 2003-10-01 23:08:32 +00:00
enami aa87bee0c5 ansi'fy. 2003-10-01 22:50:15 +00:00
chs 066b5091f4 don't dereference a vm_page pointer after we free the page. 2003-09-26 04:03:39 +00:00
drochner da03a1c8cf Fix a reversed logic in swap deallocation which could lead to
uvm_swap_free() being called with a zero slot; this might have been
the reason for crashes with sysvshm and heavy swapping.
(PR kern/22752 by Tom Spindler)
Confirmed by Chuck Silvers.
2003-09-18 13:48:05 +00:00
enami a396bb4713 Swap where the vm map's max and min offset are stored so that they can be
used during map traversal.
2003-09-10 13:38:20 +00:00
pk 1d113dcde7 Can't rely on side-effects in KASSERT expressions which was pointed out to
me by YAMAMOTO Takashi.
2003-09-01 14:20:57 +00:00
yamt 7f7c9a3509 remove an obsolete comment.
(we now have only one inactive list.)
2003-09-01 12:16:17 +00:00
pk 9a4aea0127 When retiring a swap device with marked bad blocks on it we should update
the `# swap page in use' and `# swap page only' counters.  However, at the
time of swap device removal we can no longer figure out how many of the
bad swap pages are actually also `swap only' pages.

So, on swap I/O errors arrange things to not include the bad swap pages in
the `swpgonly' counter as follows: uvm_swap_markbad() decrements `swpgonly'
by the number of bad pages, and the various VM object deallocation routines
do not decrement `swpgonly' for swap slots marked as SWSLOT_BAD.
2003-08-28 13:12:17 +00:00
yamt 91161caf3c use VM_PAGE_TO_PHYS macro instead of using phys_addr directly. 2003-08-26 15:12:18 +00:00
chs 12f04351ad fix some indentation. 2003-08-24 18:12:25 +00:00
chs 939df36e55 add support for non-executable mappings (where the hardware allows this)
and make the stack and heap non-executable by default.  the changes
fall into two basic catagories:

 - pmap and trap-handler changes.  these are all MD:
   = alpha: we already track per-page execute permission with the (software)
	PG_EXEC bit, so just have the trap handler pay attention to it.
   = i386: use a new GDT segment for %cs for processes that have no
	executable mappings above a certain threshold (currently the
	bottom of the stack).  track per-page execute permission with
	the last unused PTE bit.
   = powerpc/ibm4xx: just use the hardware exec bit.
   = powerpc/oea: we already track per-page exec bits, but the hardware only
	implements non-exec mappings at the segment level.  so track the
	number of executable mappings in each segment and turn on the no-exec
	segment bit iff the count is 0.  adjust the trap handler to deal.
   = sparc (sun4m): fix our use of the hardware protection bits.
	fix the trap handler to recognize text faults.
   = sparc64: split the existing unified TSB into data and instruction TSBs,
	and only load TTEs into the appropriate TSB(s) for the permissions.
	fix the trap handler to check for execute permission.
   = not yet implemented: amd64, hppa, sh5

 - changes in all the emulations that put a signal trampoline on the stack.
   instead, we now put the trampoline into a uvm_aobj and map that into
   the process separately.

originally from openbsd, adapted for netbsd by me.
2003-08-24 17:52:28 +00:00
chs 4ffa07757d mprotect()'s "len" is really a size_t, and we can't do any useful
bounds-checking on it.
2003-08-24 16:32:50 +00:00
pk d022b5caad uao_pagein_page() & anon_pagein():
* return failure if the page cannot be retrieved.
	* wakeup any waiters when releasing a page after successful page in.
2003-08-11 16:54:10 +00:00
pk 96f1796f30 Only deactivate pages if their wired count is zero. 2003-08-11 16:48:05 +00:00
pk 3bef941831 Make sure to call uvm_swap_free() and uvm_swap_markbad() with valid (i.e.
positive) slot numbers.
2003-08-11 16:44:35 +00:00
pk 5869d91cb9 Introduce uvm_swapisfull(), which computes the available swap space by
taking into account swap devices that are in the process of being removed.
2003-08-11 16:33:30 +00:00
agc aad01611e7 Move UCB-licensed code from 4-clause to 3-clause licence.
Patches provided by Joel Baker in PR 22364, verified by myself.
2003-08-07 16:26:28 +00:00
drochner 9c0942bc88 sync comments with reality 2003-08-02 14:12:51 +00:00
mrg 79eaf7449f de-__P()ify. 2003-07-21 00:54:43 +00:00
christos b6dc1230b9 PR/22062: Dheeraj S: Don't compare an integral type with NULL. 2003-07-06 16:19:18 +00:00
fvdl d5aece61d6 Back out the lwp/ktrace changes. They contained a lot of colateral damage,
and need to be examined and discussed more.
2003-06-29 22:28:00 +00:00
thorpej a06b275edc Undo part of the ktrace/lwp changes. In particular:
* Remove the "lwp *" argument that was added to vget().  Turns out
  that nothing actually used it!
* Remove the "lwp *" arguments that were added to VFS_ROOT(), VFS_VGET(),
  and VFS_FHTOVP(); all they did was pass it to vget() (which, as noted
  above, didn't use it).
* Remove all of the "lwp *" arguments to internal functions that were added
  just to appease the above.
2003-06-29 18:43:21 +00:00
darrenr 960df3c8d1 Pass lwp pointers throughtout the kernel, as required, so that the lwpid can
be inserted into ktrace records.  The general change has been to replace
"struct proc *" with "struct lwp *" in various function prototypes, pass
the lwp through and use l_proc to get the process pointer when needed.

Bump the kernel rev up to 1.6V
2003-06-28 14:20:43 +00:00
christos 40e148ef6b PR/21948: Todd Vierling: Implement MAP_TRYFIXED for linux emulation. 2003-06-23 21:32:33 +00:00
wiz efa11218e8 Fix typo in panic message. From miod@openbsd. 2003-06-01 09:26:10 +00:00
simonb 88bd53e829 Consistancy nit- use parentheses around return argument. 2003-05-25 13:00:40 +00:00
thorpej 36da248c07 Back out the following chagne:
http://mail-index.netbsd.org/source-changes/2003/05/08/0068.html

There were some side-effects that I didn't anticipate, and fixing them
is proving to be more difficult than I thought, do just eject for now.
Maybe one day we can look at this again.

Fixes PR kern/21517.
2003-05-10 21:10:23 +00:00
thorpej b77900c3c2 Simplify the way the bounds of the managed kernel virtual address
space is advertised to UVM by making virtual_avail and virtual_end
first-class exported variables by UVM.  Machine-dependent code is
responsible for initializing them before main() is called.  Anything
that steals KVA must adjust these variables accordingly.

This reduces the number of instances of this info from 3 to 1, and
simplifies the pmap(9) interface by removing the pmap_virtual_space()
function call, and removing two arguments from pmap_steal_memory().

This also eliminates some kludges such as having to burn kernel_map
entries on space used by the kernel and stolen KVA.

This also eliminates use of VM_{MIN,MAX}_KERNEL_ADDRESS from MI code,
this giving MD code greater flexibility over the bounds of the managed
kernel virtual address space if a given port's specific platforms can
vary in this regard (this is especially true of the evb* ports).
2003-05-08 18:13:12 +00:00
gmcgarry 9b44363ff5 Don't use overloaded term "comm". From Greg A. Woods in PR#17394. 2003-05-04 01:54:26 +00:00
wiz 6a8058b52a Misc fixes from jmc@openbsd. 2003-05-03 19:01:05 +00:00
yamt 4f0cb3e45a fix ubc pager to take care of loan_count. 2003-05-03 18:05:16 +00:00
yamt 719bd826c5 use uvm_loanbreak in uvm_fault. 2003-05-03 17:57:50 +00:00
yamt dea6f8bc9a - export raw page loan out routine as uvm_loanuobjpages. (for nfsd)
- put code for loan-breaking into a function, uvm_loanbreak.
2003-05-03 17:54:32 +00:00
tls 85c8cfb533 Correct use of MAXBSIZE where MAXPHYS was intended. This is a necessary
first step towards per-device MAXPHYS, and has the beneficial side effect
of allowing clustering to MAXPHYS even on systems that need to run with
a reduced MAXBSIZE to get more metadata buffers.
2003-04-23 00:55:17 +00:00
yamt d99d457173 correct accounting of {exec,file}pages.
they are not updated correctly when breaking loan.
2003-04-22 14:28:15 +00:00
christos 59833f145c PR/2931: Eric Beltensen: Move boolean_t and TRUE/FALSE from uvm_param.h to
types.h
2003-04-19 21:42:46 +00:00
yamt f8b7159909 unbusy a page after put it on the queue.
fix a panic with UVM_PAGE_TRKOWN when doing swapoff.
2003-04-12 14:36:43 +00:00
thorpej 03befad98b In uvm_map_clean(), only call pgo_put if the object has one.
From Quentin Garnier <quatriemek.com!netbsd>.
2003-04-09 21:39:29 +00:00
thorpej 7360657293 Tweak the way the pagesize-related variables are set:
* Remove DEFAULT_PAGE_SIZE.  We don't use PAGE_SIZE the way Mach did.
* In uvm_setpagesize(), if we are called with uvmexp.pagesize == 0,
  then assert that PAGE_SIZE != 0 (i.e. a constant), and set uvmexp.pagesize
  accordingly.
* Provide defaults for MIN_PAGE_SIZE and MAX_PAGE_SIZE if not defined
  by <machine/vmparam.h>.  If PAGE_SIZE is not a constant, MIN_PAGE_SIZE
  and MAX_PAGE_SIZE must be provided.
* If MIN_PAGE_SIZE and MAX_PAGE_SIZE are not equal (i.e. PAGE_SIZE may
  not be a constant in all configurations), then ensure that PAGE_SIZE
  and friends expand to variable references for LKMs.
2003-04-09 16:34:10 +00:00
matt 7876614463 Nuke mem_size global since nothing in the kernel actually refers to it.
(mmm lint).
2003-03-14 08:35:05 +00:00
thorpej 2d5e311009 Make PGALLOC_VERBOSE compile where size_t != int. 2003-03-10 19:52:24 +00:00
thorpej 2a493af5b0 For PMAP_CACHE_VIVT platforms, make UBC_RELEASE_UNMAP evaluate to TRUE,
and add a comment explaining why.

Reviewed by Chuq Silvers.
2003-03-10 15:07:17 +00:00
tsutsui 004ae00514 Use cpu_number() in UVMHIST_LOG() rather than non-public ci_cpuid member
in struct cpu_info.
2003-03-08 15:17:23 +00:00
matt 6074e25e08 Add support for mmap(2) to be able to return memory aligned on a 2^n
boundary.
2003-03-06 00:41:51 +00:00
thorpej 72dd57106c Implement a minimal pager for the uvm_loanzero_object, which simply has
a "put" method which reactivates or dequeues the page.

Need for pager pointed out by enami tsugutomo.
2003-03-05 01:52:41 +00:00