osfmk/vm/vm_pageout.c

234  *	allows the pageout daemon and default pager (and any other
509 		 * Handle the trusted pager throttle.
727 	memory_object_t		pager;
756 	 * If there's no pager, then we can't clean the page.  This should
758 	 * an external object, so the pager should always be there.
761 	pager = object->pager;
763 	if (pager == MEMORY_OBJECT_NULL) {
765 		panic("missing pager for copy object");
783 	 *	Write the data to its pager.
785 	 *	not a virtual address; the pager interface has been
790 	memory_object_data_initialize(pager, paging_offset, PAGE_SIZE);
1631 					 * the pageout thread for the default pager is potentially
1633 					 * default pager queue has been throttled for more than the
1642 					 * of the queue associated with the default pager... we need to
2288 				if ( !object->internal && object->pager != MEMORY_OBJECT_NULL &&
2289 				     vnode_pager_get_isinuse(object->pager, &isinuse) == KERN_SUCCESS && !isinuse) {
2389 				 * d) We don't have a default pager, and so,
2394 				 * on systems without a dynamic pager, where:
2707 	memory_object_t	pager;
2787 			    *	one and hand it to the default pager.
2798 				    *	Still no pager for the object.
2802 				    *	default pager.
2824 		   pager = object->pager;
2826 	           if (pager == MEMORY_OBJECT_NULL) {
2828 			    * This pager has been destroyed by either
2876 		    * Send the data to the pager.
2879 		   memory_object_data_return(pager,
3169 	/* internal pageout thread started when default pager registered first time */
3381  *		supplier of backing store to a pager.
3387  *		shared with another entity at the pager level.
3393  *			call the pager unlock to synchronize with other
3405  *		Note:  access of default pager objects has a rather interesting
3408  *		against a default pager backed object.  Only the default
3409  *		pager will make requests on backing store related vm_objects
3410  *		In this way the default pager can maintain the relationship
4005 				 * get it from the pager, so mark it so.
4713 				 * key depends on the VM page's "pager" object and
5667 				 * Handle the trusted pager throttle.
6532 		 * for the objects: pager, resident pages, etc...  We can't do
6603  * pager.  The data would then be stored on disk in clear (not encrypted)
6608  * Solution:  the default pager will optionally request that all the
7136 	 * We use the "pager" and the "paging_offset" for that
7142 	encrypt_iv.vm.pager_object = page->object->pager;
7265 	decrypt_iv.vm.pager_object = page->object->pager;
7299 		 * The pager did not specify that the page would be
7964 		       page->object->pager,