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107 Commits

Author SHA1 Message Date
chs 26b2b74f75 initialize amap per-page reference counts before changing the amap's 
overall reference count.  this fixes the crashes seen for the last 9 months
with web browers and plugins, which was also the cause of PR 46193.
 2012-04-08 20:47:10 +00:00
chs 6042004c72 adjust amap_cow_now() to make UVM_PAGE_TRKOWN happy. 2012-03-30 02:25:24 +00:00
para e62ee4d475 extending vmem(9) to be able to allocated resources for it's own needs. 
simplifying uvm_map handling (no special kernel entries anymore no relocking)
make malloc(9) a thin wrapper around kmem(9)
(with private interface for interrupt safety reasons)

releng@ acknowledged
 2012-01-27 19:48:38 +00:00
yamt 8ddce5912c assertion 2011-10-11 23:57:50 +00:00
rmind e52f8e8779 amap_cow_now: just free the fresh anon on error, no need to dispose it. 2011-08-17 20:46:27 +00:00
rmind 39445b05bc - Rework uvm_anfree() into uvm_anon_freelst(), which always drops the lock. 
- Free anons in uvm_anon_freelst() without lock held.
- Mechanic sync to unused loaning code.
 2011-08-06 17:25:03 +00:00
yamt 7eec89b991 reduce the number of atomic ops in common cases. it's exceptional for 
anons to remain longer than amap.
 2011-07-05 13:47:24 +00:00
hannken 79568783ba amap_copy(): Keep the source amap locked until its lock has been copied. 
Kernel assertion "anon->an_lock == amap->am_lock" no longer fails.

Ok: Mindaugas Rasiukevicius <rmind@netbsd.org>
 2011-06-27 15:56:36 +00:00
rmind c59e31527c amap_copy: fix one more regression, thanks to enami@. 2011-06-24 01:48:43 +00:00
rmind 7be1d60258 Fix uvmplock regression - a lock against oneself case in amap_swap_off(). 
Happens since amap is NULL in uvmfault_anonget(), so uvmfault_unlockall()
keeps anon locked, when it should unlock it.
 2011-06-24 01:39:22 +00:00
rmind 538c69f6e6 amap_pp_adjref: fix regression, spotted by nonaka@. 2011-06-24 01:03:08 +00:00
rmind 6398a253c4 Clean-up, add asserts, slightly simplify. 2011-06-23 18:15:30 +00:00
rmind 10583b12ce Clean up, sprinkle asserts, consify, use unsigned, use kmem_zalloc instead 
of memset, reduce the scope of some variables, improve some comments.

No functional change intended.
 2011-06-18 21:13:29 +00:00
rmind 1885100a7e amap_add/amap_unadd: clean up slightly, use unsigned, add asserts. 2011-06-18 20:51:22 +00:00
rmind 223aec6f50 Add amap_adjref_anons() helper and simplify amap_ref()/amap_unref(). 2011-06-18 20:29:56 +00:00
rmind 71341c3c42 amap_lookup{s}: add assert, clean-up slightly. 2011-06-16 19:42:20 +00:00
rmind e225b7bd09 Welcome to 5.99.53! Merge rmind-uvmplock branch: 
- Reorganize locking in UVM and provide extra serialisation for pmap(9).
  New lock order: [vmpage-owner-lock] -> pmap-lock.

- Simplify locking in some pmap(9) modules by removing P->V locking.

- Use lock object on vmobjlock (and thus vnode_t::v_interlock) to share
  the locks amongst UVM objects where necessary (tmpfs, layerfs, unionfs).

- Rewrite and optimise x86 TLB shootdown code, make it simpler and cleaner.
  Add TLBSTATS option for x86 to collect statistics about TLB shootdowns.

- Unify /dev/mem et al in MI code and provide required locking (removes
  kernel-lock on some ports).  Also, avoid cache-aliasing issues.

Thanks to Andrew Doran and Joerg Sonnenberger, as their initial patches
formed the core changes of this branch.
 2011-06-12 03:35:36 +00:00
rmind c22a36981f Replace "malloc" in comments, remove unnecessary header inclusions. 2011-04-23 18:14:12 +00:00
chuck 3ba477b154 udpate license clauses on my code to match the new-style BSD licenses. 
based on diff that rmind@ sent me.

no functional change with this commit.
 2011-02-02 15:13:33 +00:00
rmind 40cf6f3659 Remove uarea swap-out functionality: 
- Addresses the issue described in PR/38828.
- Some simplification in threading and sleepq subsystems.
- Eliminates pmap_collect() and, as a side note, allows pmap optimisations.
- Eliminates XS_CTL_DATA_ONSTACK in scsipi code.
- Avoids few scans on LWP list and thus potentially long holds of proc_lock.
- Cuts ~1.5k lines of code.  Reduces amd64 kernel size by ~4k.
- Removes __SWAP_BROKEN cases.

Tested on x86, mips, acorn32 (thanks <mpumford>) and partly tested on
acorn26 (thanks to <bjh21>).

Discussed on <tech-kern>, reviewed by <ad>.
 2009-10-21 21:11:57 +00:00
yamt 6f5397de19 assertions 2009-08-16 11:06:37 +00:00
rmind 9a2646038e Convert some panic() checks to KASSERT()s. 
This code is stable and there is no reason to enforce checks.
 2009-03-28 21:45:55 +00:00
ad 7a2060a7f5 Make adjustment of uvm_extrapages atomic since it's done without a lock. 
XXX This is still a hack.
 2008-12-03 11:43:51 +00:00
ad 4a780c9ae2 Merge vmlocking2 to head. 2008-01-02 11:48:20 +00:00
ad 371ba00b4a Allocate amaps from a pool_cache. 2007-12-08 15:46:31 +00:00
ad 4688843d2b Merge unobtrusive locking changes from the vmlocking branch. 2007-07-21 19:21:53 +00:00
ad 88ab7da936 Merge some of the less invasive changes from the vmlocking branch: 
- kthread, callout, devsw API changes
- select()/poll() improvements
- miscellaneous MT safety improvements
 2007-07-09 20:51:58 +00:00
ad 59d979c5f1 Pass an ipl argument to pool_init/POOL_INIT to be used when initializing 
the pool's lock.
 2007-03-12 18:18:22 +00:00
thorpej b3667ada6d TRUE -> true, FALSE -> false 2007-02-22 06:05:00 +00:00
thorpej 712239e366 Replace the Mach-derived boolean_t type with the C99 bool type. A 
future commit will replace use of TRUE and FALSE with true and false.
 2007-02-21 22:59:35 +00:00
ad b07ec3fc38 Merge newlock2 to head. 2007-02-09 21:55:00 +00:00
yamt 1a7bc55dcc remove some __unused from function parameters. 2006-11-01 10:17:58 +00:00
christos 4d595fd7b1 - sprinkle __unused on function decls. 
- fix a couple of unused bugs
- no more -Wno-unused for i386
 2006-10-12 01:30:41 +00:00
yamt d447115889 make amap use kmem_alloc, rather than malloc. 
(ie. make it use kernel_map, rather than kmem_map.)
kmem_map is more restricted than kernel_map,
and there's no point for amap to use it.
 2006-06-25 08:03:46 +00:00
yamt 93127a7b4c amap_splitref: assert that origref->ar_amap is initialized 
by caller beforehand.
 2006-04-21 14:04:45 +00:00
yamt 9040ed946b - amap_copy: take a "flags" argument instead of booleans. 
- add AMAP_COPY_NOMERGE flag, and use it for uvm_map_extract.
  PR/32806 from Julio M. Merino Vidal.
 2006-02-15 14:06:45 +00:00
yamt a3af4c1530 remove the following options. no objections on tech-kern@. 
UVM_PAGER_INLINE
	UVM_AMAP_INLINE
	UVM_PAGE_INLINE
	UVM_MAP_INLINE
 2006-02-11 12:45:07 +00:00
yamt 651bed2a01 - uvm_fault: move a common code of 1B and 2B to a new function. 
don't attempt to allocate anons with kernel_map locked.  PR/32543.
- amap_copy: add an assertion.
 2006-01-21 13:13:07 +00:00
chs 5570661cd8 in amap_alloc(), only put the amap on the list of amaps if we succeeded 
in allocating it.
 2006-01-18 17:03:36 +00:00
perry 0f0296d88a Remove leading __ from __(const|inline|signed|volatile) -- it is obsolete. 2005-12-24 20:45:08 +00:00
christos 95e1ffb156 merge ktrace-lwp. 2005-12-11 12:16:03 +00:00
chs 5332333501 in amap_cow_now(), handle the case where we have to sleep and some of the 
already-copied pages are paged out.  anons that have already been copied
will have refcount == 1, whereas anons that still need to be copied will
have refcount > 1.  fixes PR 25392, PR 30257, PR 31924.
 2005-11-06 15:57:32 +00:00
yamt 6fbf5bf6f1 wrap swap related code by #ifdef VMSWAP. always #define VMSWAP for now. 2005-09-13 22:00:05 +00:00
yamt 38ca5312d2 revert "defflag VMSWAP" changes for now. 
there seems to be far more people who don't want to edit
their kernel config files than i thought.
 2005-07-31 04:04:30 +00:00
yamt 1d0891101c defflag VMSWAP. 2005-07-30 06:33:33 +00:00
thorpej e569facced Use ANSI function decls. 2005-06-27 02:19:48 +00:00
yamt 50a25acc50 (try to) merge map entries in fault handler. 2005-05-17 13:55:33 +00:00
yamt 662ada8f7a allocate anons on-demand, rather than reserving static amount of 
them on boot/swapon.
 2005-05-11 13:02:25 +00:00
yamt ae24d5d705 - amap_extend: don't extend amap beyond UVM_AMAP_LARGE. 
- uvm_map_enter: if we fail to extend amap, just give up merging instead of
  bailing out immediately.
 2005-05-05 01:58:51 +00:00
yamt a7cd6f7a0e amap_wipeout: remove a comment which is no longer true. 
despite of what comment said, i left preempt() call
because i don't think of any bad effects.
 2005-04-06 13:58:40 +00:00