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- Update the vm_object locking in vm_object_reference().

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- Convert some dead code in vm_object_reference() into a comment.
This commit is contained in:
alc 2003-05-01 03:29:20 +00:00
parent e9c4374a87
commit c2343f725b
1 changed files with 8 additions and 10 deletions
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18
sys/vm/vm_object.c
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@ -369,28 +369,26 @@ vm_object_allocate(objtype_t type, vm_pindex_t size)
/*
* vm_object_reference:
*
* Gets another reference to the given object.
* Gets another reference to the given object. Note: OBJ_DEAD
* objects can be referenced during final cleaning.
*/
void
vm_object_reference(vm_object_t object)
{
if (object == NULL)
return;
vm_object_lock(object);
#if 0
/* object can be re-referenced during final cleaning */
KASSERT(!(object->flags & OBJ_DEAD),
("vm_object_reference: attempting to reference dead obj"));
#endif
if (object != kmem_object)
mtx_lock(&Giant);
VM_OBJECT_LOCK(object);
object->ref_count++;
VM_OBJECT_UNLOCK(object);
if (object->type == OBJT_VNODE) {
while (vget((struct vnode *) object->handle, LK_RETRY, curthread)) {
printf("vm_object_reference: delay in getting object\n");
}
}
vm_object_unlock(object);
if (object != kmem_object)
mtx_unlock(&Giant);
}
/*