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50 Commits

Author SHA1 Message Date
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
mycroft 24e6e6a0e7 Convert MAP_PRIVATE device mappings to MAP_SHARED on *all* platforms, not just 
the SPARC.
Remove the #ifdef COMPAT_13 for automatically adding a sharing type, since the
interface is *supposed* to support this.
Also modify the DIAGNOSTIC messages here a bit.
 1998-03-03 14:34:10 +00:00
fvdl e5bc90f40c Merge with Lite2 + local changes 1998-03-01 02:20:01 +00:00
chuck cbd05b1537 be consistent about offsets in kernel objects. vm_map_min(kernel_map) 
should always be the base [fixes problem on m68k detected by jason thorpe]

add comments to uvm_km.c explaining kernel memory management in more detail
 1998-02-24 15:58:09 +00:00
thorpej 1e3e1bfe09 Include the NFS option header. 1998-02-19 00:55:04 +00:00
drochner 93a065690b fix map range boundary check 1998-02-18 14:50:32 +00:00
mrg 3ed2e6ac6c bug fix from chuck: uvm_vnp_terminate panic when /sbin/init was unlinked 1998-02-18 06:35:46 +00:00
thorpej 550678e57f Oops, fix a typo. 1998-02-13 05:34:30 +00:00
thorpej e6c31d3db7 KNF. 1998-02-13 05:33:55 +00:00
thorpej 872181c2f2 A few changes to make it possible to read UVM histories from userland: 
- Protect option headers from inclusion if ! _KERNEL or if _LKM.
- Make sure struct uvm_history is always the same size (not dependent
  on NCPU).
- Add fmtlen and fnlen members to struct uvm_history_ent, which specify
  the lengths fo the fmt and fn strings.
- Add name, namelen, and a list entry to struct uvm_history.
- When a history is initialized, place it on the global list of all histories.
 1998-02-13 04:55:14 +00:00
thorpej cb5f8ef1df Add a global list of all UVM histories. 1998-02-13 04:52:00 +00:00
thorpej 90aee42d35 Provide a patchable knob (uvmhist_print_enabled) so that UVM history 
buffer printing can be switched on and off at run-time.  Only exists
if the kernel is build with UVMHIST_PRINT, and defaults to `on'.
 1998-02-12 20:10:15 +00:00
chs 7f45dbdfae add copyright. 1998-02-12 07:36:43 +00:00
mrg d90485202c - add defopt's for UVM, UVMHIST and PMAP_NEW. 
- remove unnecessary UVMHIST_DECL's.
 1998-02-10 14:08:44 +00:00
perry 021fdb646a add/cleanup multiple inclusion protection. 1998-02-10 02:34:17 +00:00
mrg e92c7d991e KNF. 1998-02-09 14:35:48 +00:00
mrg 7d3aef40b3 keep statistics on pageout/pagein, total pages, and total operations. 1998-02-09 13:08:22 +00:00
mrg 3112d4b3e1 KNF. 1998-02-09 04:05:36 +00:00
mrg 7ff12d37cc fill out vmtotals: t_free, t_vm, t_avm, t_rm and t_arm. leaves shared of same, and t_pw. 1998-02-08 22:23:33 +00:00
thorpej 39f8b8c99b Round allocations to page size in uvm_pageboot_alloc(). 1998-02-08 18:27:30 +00:00
mrg 6122fae970 KNF 1998-02-08 16:07:57 +00:00
mrg bc3395e590 turn of UVM history logging by default. 1998-02-08 14:19:21 +00:00
mrg d9b2f81e27 move pdhist initialisation to the same place as maphist. also, declare 
the history buffers are "struct uvm_history_ent" to ensure proper
alignment (eg, alpha).  this fixes a boottime panic when the pdhist was
used before it had been initialised.
 1998-02-08 07:52:28 +00:00
thorpej 1305ecbe62 Allow callers of uvm_km_suballoc() to specify where the base of the 
submap _must_ begin, by adding a "fixed" boolean argument.
 1998-02-08 06:15:53 +00:00
mrg 0a058cb62f implement counters for pages paged in/out 1998-02-07 17:00:36 +00:00
mrg 4ef57d4d22 KNF. 1998-02-07 12:45:53 +00:00
mrg 5e55ce6648 bzero the entire vmspace, like the old vm does. makes ps report sane values of VSZ for swapper/pagedaemon 1998-02-07 12:31:32 +00:00
mrg 1f6b921cf7 restore rcsids 1998-02-07 11:07:38 +00:00
chs 9b371040ea keep track of how many pages are currently being paged out, 
stop initiating new pageouts when "(free + paging) > freetarg".
fix pageq locking.
 1998-02-07 02:35:11 +00:00
chs c2f8ffc062 reserve some pages for the kernel, and some more especially 
for the pagedaemon allocating from kmem_object.  this should
prevent from the pagedaemon running out of memory and deadlocking.
fix counting of wired pages.
add some debugging code to detect attempts to reference free vm_pages.
 1998-02-07 02:34:08 +00:00
chs 249efd73a1 enable hashtables for swapslot storage - deadlock is fixed. 
fix initialization of swhash entries.
use malloc(M_NOWAIT) for creating kernel object.
avoid dereferencing a vm_page once the page has been freed.
 1998-02-07 02:32:37 +00:00
chs 39c12db74f declare aobj_pager, needed in uvm_km.c. 1998-02-07 02:31:06 +00:00
chs c82ac447df convert kernel_object to an aobj. 
in uvm_km_pgremove(), free swapslots if the object is an aobj.
in uvm_km_kmemalloc(), mark pages as wired and count them.
 1998-02-07 02:29:21 +00:00
chs 6376c02019 enable paging of kernel_object. 1998-02-07 02:26:46 +00:00
chs 732a925b1b add locking of kernel_map in uvm_kernacc(). 
check return value of uvm_fault_wire() in uvm_fork().
enable swappings.
 1998-02-07 02:26:04 +00:00
chs 29ec5fd8d5 prototype for uvm_map_checkprot() moved here. 
add uvmexp fields for pagouts-in-progress and kernel-reserved pages.
 1998-02-07 02:24:02 +00:00
chs 273ac223ec prototype for uvm_map_checkprot() moved to uvm_extern.h. 1998-02-07 02:22:24 +00:00
chs 21e2cac359 fix typoes in locking. 
use M_UVMAMAP instead of M_TEMP for malloc type.
 1998-02-07 02:21:29 +00:00
chs 5a7c4f2caa don't try to relock amap if there isn't one. 1998-02-07 02:19:55 +00:00
chs 7cb9f7e5b1 rearrange a bit for clarity. 1998-02-07 02:18:27 +00:00
chs 098b8c2420 fix typoes in locking. 1998-02-07 02:17:48 +00:00
chs 1f583a43b1 remove locking from UVMCNT counters. 
they don't need to be exact, and the locking causes problems
in some of places they're used.
 1998-02-07 02:16:52 +00:00
thorpej 9eb328b495 RCS ID police. 1998-02-06 22:26:13 +00:00
mrg f2caacc717 initial import of the new virtual memory system, UVM, into -current. 
UVM was written by chuck cranor <chuck@maria.wustl.edu>, with some
minor portions derived from the old Mach code.  i provided some help
getting swap and paging working, and other bug fixes/ideas.  chuck
silvers <chuq@chuq.com> also provided some other fixes.

this is the UVM kernel code portion.


this will be KNF'd shortly.  :-)
 1998-02-05 06:25:08 +00:00