svn commit: r189015 - head/sys/vm
Konstantin Belousov
kib at FreeBSD.org
Tue Feb 24 12:57:44 PST 2009
Author: kib
Date: Tue Feb 24 20:57:43 2009
New Revision: 189015
URL: http://svn.freebsd.org/changeset/base/189015
Log:
Revert the addition of the freelist argument for the vm_map_delete()
function, done in r188334. Instead, collect the entries that shall be
freed, in the deferred_freelist member of the map. Automatically purge
the deferred freelist when map is unlocked.
Tested by: pho
Reviewed by: alc
Modified:
head/sys/vm/vm_kern.c
head/sys/vm/vm_map.c
head/sys/vm/vm_map.h
head/sys/vm/vm_mmap.c
head/sys/vm/vm_unix.c
Modified: head/sys/vm/vm_kern.c
==============================================================================
--- head/sys/vm/vm_kern.c Tue Feb 24 20:43:29 2009 (r189014)
+++ head/sys/vm/vm_kern.c Tue Feb 24 20:57:43 2009 (r189015)
@@ -272,7 +272,7 @@ kmem_malloc(map, size, flags)
int flags;
{
vm_offset_t offset, i;
- vm_map_entry_t entry, freelist;
+ vm_map_entry_t entry;
vm_offset_t addr;
vm_page_t m;
int pflags;
@@ -356,10 +356,8 @@ retry:
vm_page_unlock_queues();
}
VM_OBJECT_UNLOCK(kmem_object);
- freelist = NULL;
- vm_map_delete(map, addr, addr + size, &freelist);
+ vm_map_delete(map, addr, addr + size);
vm_map_unlock(map);
- vm_map_entry_free_freelist(map, freelist);
return (0);
}
if (flags & M_ZERO && (m->flags & PG_ZERO) == 0)
@@ -458,18 +456,14 @@ kmem_free_wakeup(map, addr, size)
vm_offset_t addr;
vm_size_t size;
{
- vm_map_entry_t freelist;
- freelist = NULL;
vm_map_lock(map);
- (void) vm_map_delete(map, trunc_page(addr), round_page(addr + size),
- &freelist);
+ (void) vm_map_delete(map, trunc_page(addr), round_page(addr + size));
if (map->needs_wakeup) {
map->needs_wakeup = FALSE;
vm_map_wakeup(map);
}
vm_map_unlock(map);
- vm_map_entry_free_freelist(map, freelist);
}
/*
Modified: head/sys/vm/vm_map.c
==============================================================================
--- head/sys/vm/vm_map.c Tue Feb 24 20:43:29 2009 (r189014)
+++ head/sys/vm/vm_map.c Tue Feb 24 20:57:43 2009 (r189015)
@@ -143,7 +143,7 @@ static void vmspace_zfini(void *mem, int
static int vm_map_zinit(void *mem, int ize, int flags);
static void vm_map_zfini(void *mem, int size);
static void _vm_map_init(vm_map_t map, vm_offset_t min, vm_offset_t max);
-
+static void vm_map_entry_dispose(vm_map_t map, vm_map_entry_t entry);
#ifdef INVARIANTS
static void vm_map_zdtor(void *mem, int size, void *arg);
static void vmspace_zdtor(void *mem, int size, void *arg);
@@ -456,11 +456,28 @@ _vm_map_lock(vm_map_t map, const char *f
void
_vm_map_unlock(vm_map_t map, const char *file, int line)
{
+ vm_map_entry_t free_entry, entry;
+ vm_object_t object;
+
+ free_entry = map->deferred_freelist;
+ map->deferred_freelist = NULL;
if (map->system_map)
_mtx_unlock_flags(&map->system_mtx, 0, file, line);
else
_sx_xunlock(&map->lock, file, line);
+
+ while (free_entry != NULL) {
+ entry = free_entry;
+ free_entry = free_entry->next;
+
+ if ((entry->eflags & MAP_ENTRY_IS_SUB_MAP) == 0) {
+ object = entry->object.vm_object;
+ vm_object_deallocate(object);
+ }
+
+ vm_map_entry_dispose(map, entry);
+ }
}
void
@@ -682,6 +699,7 @@ _vm_map_init(vm_map_t map, vm_offset_t m
map->flags = 0;
map->root = NULL;
map->timestamp = 0;
+ map->deferred_freelist = NULL;
}
void
@@ -1297,19 +1315,16 @@ vm_map_fixed(vm_map_t map, vm_object_t o
vm_offset_t start, vm_size_t length, vm_prot_t prot,
vm_prot_t max, int cow)
{
- vm_map_entry_t freelist;
vm_offset_t end;
int result;
end = start + length;
- freelist = NULL;
vm_map_lock(map);
VM_MAP_RANGE_CHECK(map, start, end);
- (void) vm_map_delete(map, start, end, &freelist);
+ (void) vm_map_delete(map, start, end);
result = vm_map_insert(map, object, offset, start, end, prot,
max, cow);
vm_map_unlock(map);
- vm_map_entry_free_freelist(map, freelist);
return (result);
}
@@ -2435,23 +2450,6 @@ vm_map_entry_unwire(vm_map_t map, vm_map
entry->wired_count = 0;
}
-void
-vm_map_entry_free_freelist(vm_map_t map, vm_map_entry_t freelist)
-{
- vm_map_entry_t e;
- vm_object_t object;
-
- while (freelist != NULL) {
- e = freelist;
- freelist = freelist->next;
- if ((e->eflags & MAP_ENTRY_IS_SUB_MAP) == 0) {
- object = e->object.vm_object;
- vm_object_deallocate(object);
- }
- vm_map_entry_dispose(map, e);
- }
-}
-
/*
* vm_map_entry_delete: [ internal use only ]
*
@@ -2495,8 +2493,7 @@ vm_map_entry_delete(vm_map_t map, vm_map
* map.
*/
int
-vm_map_delete(vm_map_t map, vm_offset_t start, vm_offset_t end,
- vm_map_entry_t *freelist)
+vm_map_delete(vm_map_t map, vm_offset_t start, vm_offset_t end)
{
vm_map_entry_t entry;
vm_map_entry_t first_entry;
@@ -2575,8 +2572,8 @@ vm_map_delete(vm_map_t map, vm_offset_t
* will be set in the wrong object!)
*/
vm_map_entry_delete(map, entry);
- entry->next = *freelist;
- *freelist = entry;
+ entry->next = map->deferred_freelist;
+ map->deferred_freelist = entry;
entry = next;
}
return (KERN_SUCCESS);
@@ -2591,15 +2588,12 @@ vm_map_delete(vm_map_t map, vm_offset_t
int
vm_map_remove(vm_map_t map, vm_offset_t start, vm_offset_t end)
{
- vm_map_entry_t freelist;
int result;
- freelist = NULL;
vm_map_lock(map);
VM_MAP_RANGE_CHECK(map, start, end);
- result = vm_map_delete(map, start, end, &freelist);
+ result = vm_map_delete(map, start, end);
vm_map_unlock(map);
- vm_map_entry_free_freelist(map, freelist);
return (result);
}
Modified: head/sys/vm/vm_map.h
==============================================================================
--- head/sys/vm/vm_map.h Tue Feb 24 20:43:29 2009 (r189014)
+++ head/sys/vm/vm_map.h Tue Feb 24 20:57:43 2009 (r189015)
@@ -157,8 +157,6 @@ vm_map_entry_system_wired_count(vm_map_e
{
return (entry->wired_count - vm_map_entry_user_wired_count(entry));
}
-
-void vm_map_entry_free_freelist(vm_map_t map, vm_map_entry_t freelist);
#endif /* _KERNEL */
/*
@@ -184,6 +182,7 @@ struct vm_map {
vm_flags_t flags; /* flags for this vm_map */
vm_map_entry_t root; /* Root of a binary search tree */
pmap_t pmap; /* (c) Physical map */
+ vm_map_entry_t deferred_freelist;
#define min_offset header.start /* (c) */
#define max_offset header.end /* (c) */
};
@@ -338,7 +337,7 @@ long vmspace_wired_count(struct vmspace
#ifdef _KERNEL
boolean_t vm_map_check_protection (vm_map_t, vm_offset_t, vm_offset_t, vm_prot_t);
vm_map_t vm_map_create(pmap_t, vm_offset_t, vm_offset_t);
-int vm_map_delete(vm_map_t, vm_offset_t, vm_offset_t, vm_map_entry_t *);
+int vm_map_delete(vm_map_t, vm_offset_t, vm_offset_t);
int vm_map_find(vm_map_t, vm_object_t, vm_ooffset_t, vm_offset_t *, vm_size_t,
int, vm_prot_t, vm_prot_t, int);
int vm_map_fixed(vm_map_t, vm_object_t, vm_ooffset_t, vm_offset_t, vm_size_t,
Modified: head/sys/vm/vm_mmap.c
==============================================================================
--- head/sys/vm/vm_mmap.c Tue Feb 24 20:43:29 2009 (r189014)
+++ head/sys/vm/vm_mmap.c Tue Feb 24 20:57:43 2009 (r189015)
@@ -552,7 +552,6 @@ munmap(td, uap)
vm_offset_t addr;
vm_size_t size, pageoff;
vm_map_t map;
- vm_map_entry_t freelist;
addr = (vm_offset_t) uap->addr;
size = uap->len;
@@ -572,7 +571,6 @@ munmap(td, uap)
map = &td->td_proc->p_vmspace->vm_map;
if (addr < vm_map_min(map) || addr + size > vm_map_max(map))
return (EINVAL);
- freelist = NULL;
vm_map_lock(map);
#ifdef HWPMC_HOOKS
/*
@@ -595,9 +593,8 @@ munmap(td, uap)
}
#endif
/* returns nothing but KERN_SUCCESS anyway */
- vm_map_delete(map, addr, addr + size, &freelist);
+ vm_map_delete(map, addr, addr + size);
vm_map_unlock(map);
- vm_map_entry_free_freelist(map, freelist);
return (0);
}
Modified: head/sys/vm/vm_unix.c
==============================================================================
--- head/sys/vm/vm_unix.c Tue Feb 24 20:43:29 2009 (r189014)
+++ head/sys/vm/vm_unix.c Tue Feb 24 20:57:43 2009 (r189015)
@@ -72,7 +72,6 @@ obreak(td, uap)
struct obreak_args *uap;
{
struct vmspace *vm = td->td_proc->p_vmspace;
- vm_map_entry_t freelist;
vm_offset_t new, old, base;
rlim_t datalim, vmemlim;
int rv;
@@ -86,7 +85,6 @@ obreak(td, uap)
do_map_wirefuture = FALSE;
new = round_page((vm_offset_t)uap->nsize);
- freelist = NULL;
vm_map_lock(&vm->vm_map);
base = round_page((vm_offset_t) vm->vm_daddr);
@@ -140,7 +138,7 @@ obreak(td, uap)
do_map_wirefuture = TRUE;
}
} else if (new < old) {
- rv = vm_map_delete(&vm->vm_map, new, old, &freelist);
+ rv = vm_map_delete(&vm->vm_map, new, old);
if (rv != KERN_SUCCESS) {
error = ENOMEM;
goto done;
@@ -149,7 +147,6 @@ obreak(td, uap)
}
done:
vm_map_unlock(&vm->vm_map);
- vm_map_entry_free_freelist(&vm->vm_map, freelist);
if (do_map_wirefuture)
(void) vm_map_wire(&vm->vm_map, old, new,
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