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1621 Commits

Author SHA1 Message Date
Alan Cox
f566a0b6ba Assert that the vm object is locked on entry to vm_pager_get_pages(). 2003-06-23 06:15:05 +00:00
Alan Cox
f29ba63ec9 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
Poul-Henning Kamp
3b6d965263 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
Alan Cox
c8567c3a77 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
Alan Cox
7ca33ad1e8 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
Alan Cox
d98ddc4615 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
Poul-Henning Kamp
a6af4ff136 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
Alan Cox
ebf7512532 Lock one of the vm objects involved in an optimized copy-on-write fault. 2003-06-21 06:31:42 +00:00
Alan Cox
06ecade7d8 - 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
Alan Cox
5ea4972cd4 Make swap_pager_haspages() static; remove unused function prototypes. 2003-06-20 20:20:06 +00:00
Poul-Henning Kamp
adece6e592 Initialize b_saveaddr when we hand out pbufs 2003-06-20 08:35:28 +00:00
Alan Cox
e50346b5e0 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
Alan Cox
37681d8642 Assert that the vm object is locked in vm_page_try_to_free(). 2003-06-19 01:50:14 +00:00
Alan Cox
d18e8afe99 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
Alan Cox
31953be936 Lock the vm object when freeing a vm page. 2003-06-18 04:27:18 +00:00
Poul-Henning Kamp
b94b853bf1 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
Poul-Henning Kamp
cefb5754dd 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
Alan Cox
bf5f21b622 Remove an unnecessary forward declaration. 2003-06-15 07:28:33 +00:00
Alan Cox
a04a7f2242 Use #ifdef __alpha__, not __alpha. 2003-06-15 00:12:42 +00:00
Alan Cox
49a2507bd1 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
Alan Cox
89f4fca265 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
Alan Cox
33a609ece0 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
Alan Cox
8630c1173e 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
David E. O'Brien
874651b13c Use __FBSDID(). 2003-06-11 23:50:51 +00:00
Peter Wemm
77e2a274d0 GC unused cpu_wait() function 2003-06-11 05:20:33 +00:00
Alan Cox
2a8f9ab57f - 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
Poul-Henning Kamp
c1f5a18201 Revert last commit, I have no idea what happened. 2003-06-09 22:51:36 +00:00
Poul-Henning Kamp
47f94c12da A white-space nit I noticed. 2003-06-09 19:40:34 +00:00
Alan Cox
bc5b057f6c Hold the vm object's lock when performing vm_page_lookup(). 2003-06-09 07:01:05 +00:00
Alan Cox
3471677cc9 Don't use vm_object_set_flag() to initialize the vm object's flags. 2003-06-09 06:50:02 +00:00
Alan Cox
138449dc19 - 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
Alan Cox
984a95d563 Lock the kernel object in kmem_alloc(). 2003-06-07 23:24:10 +00:00
Alan Cox
36d1fdf5a2 Teach vm_page_grab() how to handle the vm object's lock. 2003-06-07 23:22:04 +00:00
Alan Cox
19ba4c8e49 Assert that the vm object is locked on entry to swap_pager_freespace(). 2003-06-07 20:43:16 +00:00
Alan Cox
d7fc221044 Pass the vm object to vm_object_collapse() with its lock held. 2003-06-07 02:29:17 +00:00
Poul-Henning Kamp
8f16d45326 Fix NFS file swapping, I broke it 3 months ago it seems. 2003-06-05 21:57:19 +00:00
Alan Cox
40b808a842 - Extend the scope of the backing object's lock in vm_object_collapse(). 2003-06-05 20:55:27 +00:00
Alan Cox
b72b0115ee - 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
Alan Cox
bc73ee3fe7 - Add VM_OBJECT_TRYLOCK(). 2003-06-04 19:59:23 +00:00
Alan Cox
3b68228cce - 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
Alan Cox
bdbfbaafcc Add vm object locking to vm_object_coalesce(). 2003-06-03 19:37:01 +00:00
Alan Cox
cccf11b865 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
Poul-Henning Kamp
c5d771b807 Prepend _ to internal union members to avoid ambiguity. 
Found by:       FlexeLint
 2003-05-31 19:52:15 +00:00
Poul-Henning Kamp
0b074f6c93 Remove unused variables 
Found by:       FlexeLint
 2003-05-31 19:51:05 +00:00
Alan Cox
34567de7fc Add vm object locking to vm_object_madvise(). 2003-05-31 19:40:57 +00:00
David Schultz
e92686d065 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
Alan Cox
1c500307d1 Reduce the size of a vm object by converting its shadow list from a TAILQ 
to a LIST.

Approved by:	re (rwatson)
 2003-05-18 04:10:16 +00:00
John Baldwin
90af4afacb - Merge struct procsig with struct sigacts. 
- Move struct sigacts out of the u-area and malloc() it using the
  M_SUBPROC malloc bucket.
- Add a small sigacts_*() API for managing sigacts structures: sigacts_alloc(),
  sigacts_free(), sigacts_copy(), sigacts_share(), and sigacts_shared().
- Remove the p_sigignore, p_sigacts, and p_sigcatch macros.
- Add a mutex to struct sigacts that protects all the members of the struct.
- Add sigacts locking.
- Remove Giant from nosys(), kill(), killpg(), and kern_sigaction() now
  that sigacts is locked.
- Several in-kernel functions such as psignal(), tdsignal(), trapsignal(),
  and thread_stopped() are now MP safe.

Reviewed by:	arch@
Approved by:	re (rwatson)
 2003-05-13 20:36:02 +00:00
Alan Cox
3a12f5da1f Give the kmem object's mutex a unique name, instead of "vm object", 
to avoid false reports of lock-order reversal with a system map mutex.

Approved by:	re (jhb)
 2003-05-09 02:13:23 +00:00
Alan Cox
658ad5fff5 Lock the vm_object when performing vm_pager_deallocate(). 2003-05-06 02:45:28 +00:00