Cross Reference: /src/sys/uvm/uvm

Lines Matching defs:anon
56  *  A->K  anon page to wired kernel page (e.g. mbuf data area)
57  *  O->A  uvm_object to anon loan (e.g. vnode page to an anon)
63  * of page is considered "owned" by the uvm_object (not the anon).
72  * object/anon which the page is owned by.  this is a good side-effect,
78  * an anon may "adopt" an orphaned page.
143 	struct vm_anon *anon;
161 		 * find the page we want.   check the anon layer first.
165 			anon = amap_lookup(aref, curaddr - ufi->entry->start);
167 			anon = NULL;
171 		if (anon) {
172 			rv = uvm_loananon(ufi, output, flags, anon);
230  * => result is either an array of anon's or vm_pages (depending on flags)
332  * uvm_loananon: loan a page from an anon out
344     struct vm_anon *anon)
352 	 * if we are loaning to "another" anon then it is easy, we just
353 	 * bump the reference count on the current anon and return a
358 		KASSERT(rw_write_held(anon->an_lock));
359 		pg = anon->an_page;
360 		if (pg && (pg->flags & PG_ANON) != 0 && anon->an_ref == 1) {
371 		anon->an_ref++;
372 		**output = anon;
384 	KASSERT(rw_write_held(anon->an_lock));
385 	error = uvmfault_anonget(ufi, ufi->entry->aref.ar_amap, anon);
388 	 * if we were unable to get the anon, then uvmfault_anonget has
415 	pg = anon->an_page;
735 	 * must be a loan to an anon.   check to see if there is already
736 	 * an anon associated with this page.  if so, then just return
743 		anon = pg->uanon;
744 		anon->an_ref++;
751 		**output = anon;
757 	 * need to allocate a new anon
760 	anon = uvm_analloc();
761 	if (anon == NULL) {
774 	pg->uanon = anon;
775 	anon->an_page = pg;
776 	anon->an_lock = /* TODO: share amap lock */
783 	rw_exit(&anon->an_lock);
784 	**output = anon;
799 	if (anon) {
800 		anon->an_ref--;
801 		uvm_anfree(anon);
874 	 * loaning to an anon.  check to see if there is already an anon
880 		anon = pg->uanon;
881 		rw_enter(&anon->an_lock, RW_WRITER);
882 		anon->an_ref++;
883 		rw_exit(&anon->an_lock);
885 		**output = anon;
891 	 * need to allocate a new anon
894 	anon = uvm_analloc();
895 	if (anon == NULL) {
901 	anon->an_page = pg;
902 	pg->uanon = anon;
908 	rw_exit(&anon->an_lock);
910 	**output = anon;
929 	struct vm_anon *anon, *to_free = NULL;
934 		anon = *aloans++;
935 		if (--anon->an_ref == 0) {
936 			uvm_anfree(anon);
959 		 * do a little dance to acquire the object or anon lock
981 		 * drop our loan.  if page is owned by an anon but
982 		 * PG_ANON is not set, the page was loaned to the anon
984 		 * this by turning the anon's loan into real ownership
988 		 * an anon) or free it (if the page is now unowned).
1129 	 * an anon (i.e. we are breaking an O->K
1161 uvm_loanbreak_anon(struct vm_anon *anon, struct uvm_object *uobj)
1166 	KASSERT(rw_write_held(anon->an_lock));
1168 	KASSERT(anon->an_page->loan_count > 0);
1176 	oldpg = anon->an_page;
1183 	oldstatus = uvm_pagegetdirty(anon->an_page);
1205 	/* install new page in anon */
1206 	anon->an_page = newpg;
1207 	newpg->uanon = anon;
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