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2763308887
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1625 Commits

Author SHA1 Message Date
bmilekic
2763308887 Make sure that the zone destructor doesn't get called twice in 
certain free paths.
 2003-06-25 17:25:45 +00:00
alc
8ef02c4002 Remove a GIANT_REQUIRED on the kernel object that we no longer need. 2003-06-25 05:31:02 +00:00
alc
a4f8c4746a Maintain the lock on a vm object when calling vm_page_grab(). 2003-06-25 04:53:56 +00:00
alc
cbc68243ab Assert that the vm object is locked on entry to dev_pager_getpages(). 2003-06-24 19:48:34 +00:00
alc
b3592fe6d2 Assert that the vm object is locked on entry to vm_pager_get_pages(). 2003-06-23 06:15:05 +00:00
alc
fa54a6610e Maintain a lock on the vm object of interest throughout vm_fault(), 
releasing the lock only if we are about to sleep (e.g., vm_pager_get_pages()
or vm_pager_has_pages()).  If we sleep, we have marked the vm object with
the paging-in-progress flag.
 2003-06-22 21:35:41 +00:00
phk
c81c59299b Add a f_vnode field to struct file. 
Several of the subtypes have an associated vnode which is used for
stuff like the f*() functions.

By giving the vnode a speparate field, a number of checks for the specific
subtype can be replaced simply with a check for f_vnode != NULL, and
we can later free f_data up to subtype specific use.

At this point in time, f_data still points to the vnode, so any code I
might have overlooked will still work.
 2003-06-22 08:41:43 +00:00
alc
5d0aaa2a87 As vm_fault() descends the chain of backing objects, set paging-in- 
progress on the next object before clearing it on the current object.
 2003-06-22 05:36:53 +00:00
alc
17a3946774 Complete the vm object locking in vm_object_backing_scan(); specifically, 
deal with the case where we need to sleep on a busy page with two vm object
locks held.
 2003-06-22 02:35:06 +00:00
alc
752ed0a2b9 Make some style and white-space changes to the copy-on-write path through 
vm_fault(); remove a pointless assignment statement from that path.
 2003-06-22 00:00:11 +00:00
phk
42a4ac2ba1 Use a do {...} while (0); and a couple of breaks to reduce the level 
of indentation a bit.
 2003-06-21 08:27:06 +00:00
alc
ed79b4d625 Lock one of the vm objects involved in an optimized copy-on-write fault. 2003-06-21 06:31:42 +00:00
alc
ab509a1fdd - Increase the scope of the vm object lock in vm_object_collapse(). 
- Assert that the vm object and its backing vm object are both locked in
   vm_object_qcollapse().
 2003-06-21 04:14:48 +00:00
alc
6106a85499 Make swap_pager_haspages() static; remove unused function prototypes. 2003-06-20 20:20:06 +00:00
phk
85ce27a435 Initialize b_saveaddr when we hand out pbufs 2003-06-20 08:35:28 +00:00
alc
893b54638f The so-called "optimized copy-on-write fault" case should not require 
the vm map lock.  What's really needed is vm object locking, which
is (for the moment) provided Giant.

Reviewed by:	tegge
 2003-06-20 04:20:36 +00:00
alc
cb7655e83c Assert that the vm object is locked in vm_page_try_to_free(). 2003-06-19 01:50:14 +00:00
alc
29c6e6376c Fix a vm object reference leak in the page-based copy-on-write mechanism 
used by the zero-copy sockets implementation.

Reviewed by:	gallatin
 2003-06-19 01:40:44 +00:00
alc
cacc52e8aa Lock the vm object when freeing a vm page. 2003-06-18 04:27:18 +00:00
phk
bd4fe20bfd This file was ignored by CVS in my last commit for some reason: 
Remove pointless initialization of b_spc field, which now no longer
exists.
 2003-06-16 09:31:15 +00:00
phk
24cc9156fe Add the same KASSERT to all VOP_STRATEGY and VOP_SPECSTRATEGY implementations 
to check that the buffer points to the correct vnode.
 2003-06-15 18:53:00 +00:00
alc
ff1c2851e3 Remove an unnecessary forward declaration. 2003-06-15 07:28:33 +00:00
alc
a7a826b5cb Use #ifdef __alpha__, not __alpha. 2003-06-15 00:12:42 +00:00
alc
83f108b04d Migrate the thread stack management functions from the machine-dependent 
to the machine-independent parts of the VM.  At the same time, this
introduces vm object locking for the non-i386 platforms.

Two details:

1. KSTACK_GUARD has been removed in favor of KSTACK_GUARD_PAGES.  The
different machine-dependent implementations used various combinations
of KSTACK_GUARD and KSTACK_GUARD_PAGES.  To disable guard page, set
KSTACK_GUARD_PAGES to 0.

2. Remove the (unnecessary) clearing of PG_ZERO in vm_thread_new.  In
5.x, (but not 4.x,) PG_ZERO can only be set if VM_ALLOC_ZERO is passed
to vm_page_alloc() or vm_page_grab().
 2003-06-14 23:23:55 +00:00
alc
d20c30720b Move the *_new_altkstack() and *_dispose_altkstack() functions out of the 
various pmap implementations into the machine-independent vm.  They were
all identical.
 2003-06-14 06:20:25 +00:00
alc
d2198cef89 Extend the scope of the vm object lock in swp_pager_async_iodone() to cover 
a vm_page_free().
 2003-06-13 06:17:42 +00:00
alc
d66a37a0f2 Add vm object locking to various pagers' "get pages" methods, i386 stack 
management functions, and a u area management function.
 2003-06-13 03:02:28 +00:00
obrien
b0678d7a44 Use __FBSDID(). 2003-06-11 23:50:51 +00:00
peter
fda03b7cfc GC unused cpu_wait() function 2003-06-11 05:20:33 +00:00
alc
cad0ed280c - Finish vm object and page locking in vnode_pager_setsize(). 
- Make some small style changes to vnode_pager_setsize(); most notably,
   move two comments to a more logical place.
 2003-06-10 20:28:41 +00:00
phk
07cd5a08f3 Revert last commit, I have no idea what happened. 2003-06-09 22:51:36 +00:00
phk
5411462454 A white-space nit I noticed. 2003-06-09 19:40:34 +00:00
alc
f13256329b Hold the vm object's lock when performing vm_page_lookup(). 2003-06-09 07:01:05 +00:00
alc
fd950733b7 Don't use vm_object_set_flag() to initialize the vm object's flags. 2003-06-09 06:50:02 +00:00
alc
6a3f0ec4b1 - Properly handle the paging_in_progress case on two vm objects in 
vm_object_deallocate().
 - Remove vm_object_pip_sleep().
 2003-06-08 23:01:24 +00:00
alc
3812b42f43 Lock the kernel object in kmem_alloc(). 2003-06-07 23:24:10 +00:00
alc
e448f32b52 Teach vm_page_grab() how to handle the vm object's lock. 2003-06-07 23:22:04 +00:00
alc
c57f179395 Assert that the vm object is locked on entry to swap_pager_freespace(). 2003-06-07 20:43:16 +00:00
alc
9b7a0e2182 Pass the vm object to vm_object_collapse() with its lock held. 2003-06-07 02:29:17 +00:00
phk
760be5c8ca Fix NFS file swapping, I broke it 3 months ago it seems. 2003-06-05 21:57:19 +00:00
alc
37fef77ad3 - Extend the scope of the backing object's lock in vm_object_collapse(). 2003-06-05 20:55:27 +00:00
alc
3be7bee315 - Add further vm object locking to vm_object_deallocate(), specifically, 
for accessing a vm object's shadows.
 2003-06-04 21:07:42 +00:00
alc
f9029b703d - Add VM_OBJECT_TRYLOCK(). 2003-06-04 19:59:23 +00:00
alc
1c0932407b - Add vm object locking to vm_object_deallocate(). (Still more 
changes are required.)
 - Remove special-case macros for kmem object locking.  They are
   no longer used.
 2003-06-04 06:00:55 +00:00
alc
16c442a3a1 Add vm object locking to vm_object_coalesce(). 2003-06-03 19:37:01 +00:00
alc
5ba1cfe547 Change kernel_object and kmem_object to (&kernel_object_store) and 
(&kmem_object_store), respectively.  This allows the address of these
objects to be resolved at link-time rather than run-time.
 2003-06-01 23:59:48 +00:00
phk
22c73f78e7 Prepend _ to internal union members to avoid ambiguity. 
Found by:       FlexeLint
 2003-05-31 19:52:15 +00:00
phk
fb8b6c2546 Remove unused variables 
Found by:       FlexeLint
 2003-05-31 19:51:05 +00:00
alc
bd43f8c10d Add vm object locking to vm_object_madvise(). 2003-05-31 19:40:57 +00:00
das
b8e4e0e3ab If we seem to be out of VM, don't allow the pagedaemon to kill 
processes in the first pass.  Among other things, this will give
us a chance to launder vnode-backed pages before concluding that
we need more swap.  This is particularly useful for systems that
have no swap.

While here, update a comment and remove some long-unused code.

Reported by:	Lucky Green <shamrock@cypherpunks.to>
Suggested by:	dillon
Approved by:	re (rwatson)
 2003-05-19 00:51:07 +00:00