Cross Reference: /src/sys/uvm/uvm

Lines Matching defs:anon
29  * uvm_anon.c: uvm anon ops
63 	struct vm_anon *anon = object;
65 	anon->an_ref = 0;
66 	anon->an_lock = NULL;
67 	anon->an_page = NULL;
69 	anon->an_swslot = 0;
75  * uvm_analloc: allocate a new anon.
77  * => anon will have no lock associated.
82 	struct vm_anon *anon;
84 	anon = pool_cache_get(&uvm_anon_cache, PR_NOWAIT);
85 	if (anon) {
86 		KASSERT(anon->an_ref == 0);
87 		KASSERT(anon->an_lock == NULL);
88 		KASSERT(anon->an_page == NULL);
90 		KASSERT(anon->an_swslot == 0);
92 		anon->an_ref = 1;
94 	return anon;
98  * uvm_anfree: free a single anon structure
100  * => anon must be removed from the amap (if anon was in an amap).
101  * => amap must be locked, if anon was owned by amap.
105 uvm_anfree(struct vm_anon *anon)
107 	struct vm_page *pg = anon->an_page, *pg2 __diagused;
110 	UVMHIST_CALLARGS(maphist,"(anon=%#jx)", (uintptr_t)anon, 0,0,0);
112 	KASSERT(anon->an_lock == NULL || rw_write_held(anon->an_lock));
113 	KASSERT(anon->an_ref == 0);
120 		KASSERT(anon->an_lock != NULL);
123 		 * If there is a resident page and it is loaned, then anon
129 			pg2 = uvm_anon_lockloanpg(anon);
149 			 * If page has no UVM object, then anon is the owner,
163 				rw_obj_hold(anon->an_lock);
167 			UVMHIST_LOG(maphist, "anon %#jx, page %#jx: "
168 			    "freed now!", (uintptr_t)anon, (uintptr_t)pg,
173 		if (anon->an_swslot > 0) {
180 	anon->an_lock = NULL;
186 	uvm_anon_dropswap(anon);
187 	uvmpdpol_anfree(anon);
189 	pool_cache_put(&uvm_anon_cache, anon);
193  * uvm_anon_lockloanpg: given a locked anon, lock its resident page owner.
195  * => anon is locked by caller
196  * => on return: anon is locked
202  * => note that the only time an anon has an ownerless resident page
206  *	on an anon's resident page and that page has a non-zero loan
210 uvm_anon_lockloanpg(struct vm_anon *anon)
215 	KASSERT(rw_lock_held(anon->an_lock));
226 	while (((pg = anon->an_page) != NULL) && pg->loan_count != 0) {
231 			 * toggle our anon lock and try again
242 				op = rw_lock_op(anon->an_lock);
243 				rw_exit(anon->an_lock);
245 				rw_enter(anon->an_lock, op);
268  * uvm_anon_pagein: fetch an anon's page.
270  * => anon must be locked, and is unlocked upon return.
275 uvm_anon_pagein(struct vm_amap *amap, struct vm_anon *anon)
280 	KASSERT(rw_write_held(anon->an_lock));
281 	KASSERT(anon->an_lock == amap->am_lock);
284 	 * Get the page of the anon.
287 	switch (uvmfault_anonget(NULL, amap, anon)) {
290 		KASSERT(rw_write_held(anon->an_lock));
296 		 * anon was freed.
309 	pg = anon->an_page;
311 	if (anon->an_swslot > 0) {
312 		uvm_swap_free(anon->an_swslot, 1);
314 	anon->an_swslot = 0;
324 	rw_exit(anon->an_lock);
332  * uvm_anon_dropswap: release any swap resources from this anon.
334  * => anon must be locked or have a reference count of 0.
337 uvm_anon_dropswap(struct vm_anon *anon)
341 	if (anon->an_swslot == 0)
344 	UVMHIST_LOG(maphist,"freeing swap for anon %#jx, paged to swslot %#jx",
345 		    (uintptr_t)anon, anon->an_swslot, 0, 0);
346 	uvm_swap_free(anon->an_swslot, 1);
347 	anon->an_swslot = 0;
353  * uvm_anon_release: release an anon and its page.
355  * => anon should not have any references.
356  * => anon must be locked.
360 uvm_anon_release(struct vm_anon *anon)
362 	struct vm_page *pg = anon->an_page;
365 	KASSERT(rw_write_held(anon->an_lock));
370 	KASSERT(pg->uanon == anon);
372 	KASSERT(anon->an_ref == 0);
380 	KASSERT(anon->an_page == NULL);
381 	lock = anon->an_lock;
382 	uvm_anfree(anon);
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