Function vm_object_populate

freebsd/vm/vm_object.c:2195–2221

* Populate the specified range of the object with valid pages. Returns * TRUE if the range is successfully populated and FALSE otherwise. * * Note: This function should be optimized to pass a larger array of * pages to vm_pager_get_pages() before it is applied to a non- * OBJT_DEVICE object. * * The object must be locked. */

 *	The object must be locked.
 */
boolean_t
vm_object_populate(vm_object_t object, vm_pindex_t start, vm_pindex_t end)
{
	vm_page_t m;
	vm_pindex_t pindex;
	int rv;

	VM_OBJECT_ASSERT_WLOCKED(object);
	for (pindex = start; pindex < end; pindex++) {
		rv = vm_page_grab_valid(&m, object, pindex, VM_ALLOC_NORMAL);
		if (rv != VM_PAGER_OK)
			break;

		/*
		 * Keep "m" busy because a subsequent iteration may unlock
		 * the object.
		 */
	}
	if (pindex > start) {
		m = vm_page_lookup(object, start);
		while (m != NULL && m->pindex < pindex) {
			vm_page_xunbusy(m);
			m = TAILQ_NEXT(m, listq);
		}
	}
	return (pindex == end);
}

/*
 *	Routine:	vm_object_coalesce