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- Add vm object locking to vm_object_deallocate(). (Still more

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changes are required.)
 - Remove special-case macros for kmem object locking.  They are
   no longer used.
This commit is contained in:
Alan Cox 2003-06-04 06:00:55 +00:00
parent 8f17707c61
commit 3b68228cce
2 changed files with 15 additions and 17 deletions
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27
sys/vm/vm_object.c
View file

@ -440,14 +440,13 @@ vm_object_deallocate(vm_object_t object)
{
vm_object_t temp;
vm_object_lock(object);
if (object != kmem_object)
mtx_lock(&Giant);
while (object != NULL) {
VM_OBJECT_LOCK(object);
if (object->type == OBJT_VNODE) {
VM_OBJECT_LOCK(object);
vm_object_vndeallocate(object);
mtx_unlock(&Giant);
return;
goto done;
}
KASSERT(object->ref_count != 0,
@ -461,8 +460,8 @@ vm_object_deallocate(vm_object_t object)
*/
object->ref_count--;
if (object->ref_count > 1) {
vm_object_unlock(object);
return;
VM_OBJECT_UNLOCK(object);
goto done;
} else if (object->ref_count == 1) {
if (object->shadow_count == 0) {
vm_object_set_flag(object, OBJ_ONEMAPPING);
@ -487,11 +486,14 @@ vm_object_deallocate(vm_object_t object)
robject->paging_in_progress ||
object->paging_in_progress
) {
/* XXX */ VM_OBJECT_UNLOCK(object);
vm_object_pip_sleep(robject, "objde1");
vm_object_pip_sleep(object, "objde2");
/* XXX */ VM_OBJECT_LOCK(object);
}
VM_OBJECT_UNLOCK(object);
if (robject->ref_count == 1) {
/* XXX */ VM_OBJECT_LOCK(robject);
robject->ref_count--;
object = robject;
goto doterm;
@ -502,11 +504,10 @@ vm_object_deallocate(vm_object_t object)
continue;
}
}
vm_object_unlock(object);
return;
VM_OBJECT_UNLOCK(object);
goto done;
}
doterm:
VM_OBJECT_LOCK(object);
temp = object->backing_object;
if (temp != NULL) {
VM_OBJECT_LOCK(temp);
@ -527,7 +528,9 @@ doterm:
VM_OBJECT_UNLOCK(object);
object = temp;
}
vm_object_unlock(object);
done:
if (object != kmem_object)
mtx_unlock(&Giant);
}
/*

5
sys/vm/vm_object.h
View file

@ -182,11 +182,6 @@ extern struct vm_object kmem_object_store;
#define VM_OBJECT_MTX(object) (&(object)->mtx)
#define VM_OBJECT_UNLOCK(object) mtx_unlock(&(object)->mtx)
#define vm_object_lock(object) \
mtx_lock((object) == kmem_object ? &kmem_object->mtx : &Giant)
#define vm_object_unlock(object) \
mtx_unlock((object) == kmem_object ? &kmem_object->mtx : &Giant)
void vm_object_set_flag(vm_object_t object, u_short bits);
void vm_object_clear_flag(vm_object_t object, u_short bits);
void vm_object_pip_add(vm_object_t object, short i);