67 static void __page_cache_release(struct folio *folio, struct lruvec **lruvecp,  in __page_cache_release()  argument
70 	if (folio_test_lru(folio)) {  in __page_cache_release()
71 		folio_lruvec_relock_irqsave(folio, lruvecp, flagsp);  in __page_cache_release()
72 		lruvec_del_folio(*lruvecp, folio);  in __page_cache_release()
73 		__folio_clear_lru_flags(folio);  in __page_cache_release()
81 static void page_cache_release(struct folio *folio)  in page_cache_release()  argument
86 	__page_cache_release(folio, &lruvec, &flags);  in page_cache_release()
91 void __folio_put(struct folio *folio)  in __folio_put()  argument
93 	if (unlikely(folio_is_zone_device(folio))) {  in __folio_put()
94 		free_zone_device_folio(folio);  in __folio_put()
98 	if (folio_test_hugetlb(folio)) {  in __folio_put()
99 		free_huge_folio(folio);  in __folio_put()
103 	page_cache_release(folio);  in __folio_put()
104 	folio_unqueue_deferred_split(folio);  in __folio_put()
105 	mem_cgroup_uncharge(folio);  in __folio_put()
106 	free_frozen_pages(&folio->page, folio_order(folio));  in __folio_put()
110 typedef void (*move_fn_t)(struct lruvec *lruvec, struct folio *folio);
112 static void lru_add(struct lruvec *lruvec, struct folio *folio)  in lru_add()  argument
114 	int was_unevictable = folio_test_clear_unevictable(folio);  in lru_add()
115 	long nr_pages = folio_nr_pages(folio);  in lru_add()
117 	VM_BUG_ON_FOLIO(folio_test_lru(folio), folio);  in lru_add()
130 	if (folio_evictable(folio)) {  in lru_add()
134 		folio_clear_active(folio);  in lru_add()
135 		folio_set_unevictable(folio);  in lru_add()
143 		folio->mlock_count = 0;  in lru_add()
148 	lruvec_add_folio(lruvec, folio);  in lru_add()
149 	trace_mm_lru_insertion(folio);  in lru_add()
168 		struct folio *folio = fbatch->folios[i];  in folio_batch_move_lru()  local
171 		if (!is_lru_add && !folio_test_clear_lru(folio))  in folio_batch_move_lru()
184 		if (is_lru_add && folio_ref_freeze(folio, 1)) {  in folio_batch_move_lru()
185 			__folio_clear_active(folio);  in folio_batch_move_lru()
186 			__folio_clear_unevictable(folio);  in folio_batch_move_lru()
187 			folio_unqueue_deferred_split(folio);  in folio_batch_move_lru()
189 			folio_batch_add(&free_fbatch, folio);  in folio_batch_move_lru()
193 		folio_lruvec_relock_irqsave(folio, &lruvec, &flags);  in folio_batch_move_lru()
194 		move_fn(lruvec, folio);  in folio_batch_move_lru()
196 		folio_set_lru(folio);  in folio_batch_move_lru()
212 		struct folio *folio, move_fn_t move_fn, bool disable_irq)  in __folio_batch_add_and_move()  argument
216 	folio_get(folio);  in __folio_batch_add_and_move()
223 	if (!folio_batch_add(this_cpu_ptr(fbatch), folio) ||  in __folio_batch_add_and_move()
224 			!folio_may_be_lru_cached(folio) || lru_cache_disabled())  in __folio_batch_add_and_move()
233 #define folio_batch_add_and_move(folio, op)		\  argument
236 		folio,					\
242 static void lru_move_tail(struct lruvec *lruvec, struct folio *folio)  in lru_move_tail()  argument
244 	if (folio_test_unevictable(folio))  in lru_move_tail()
247 	lruvec_del_folio(lruvec, folio);  in lru_move_tail()
248 	folio_clear_active(folio);  in lru_move_tail()
249 	lruvec_add_folio_tail(lruvec, folio);  in lru_move_tail()
250 	__count_vm_events(PGROTATED, folio_nr_pages(folio));  in lru_move_tail()
260 void folio_rotate_reclaimable(struct folio *folio)  in folio_rotate_reclaimable()  argument
262 	if (folio_test_locked(folio) || folio_test_dirty(folio) ||  in folio_rotate_reclaimable()
263 	    folio_test_unevictable(folio) || !folio_test_lru(folio))  in folio_rotate_reclaimable()
266 	folio_batch_add_and_move(folio, lru_move_tail);  in folio_rotate_reclaimable()
269 static void lru_activate(struct lruvec *lruvec, struct folio *folio)  in lru_activate()  argument
271 	long nr_pages = folio_nr_pages(folio);  in lru_activate()
273 	if (folio_test_active(folio) || folio_test_unevictable(folio))  in lru_activate()
277 	lruvec_del_folio(lruvec, folio);  in lru_activate()
278 	folio_set_active(folio);  in lru_activate()
279 	lruvec_add_folio(lruvec, folio);  in lru_activate()
280 	trace_mm_lru_activate(folio);  in lru_activate()
295 void folio_activate(struct folio *folio)  in folio_activate()  argument
297 	if (folio_test_active(folio) || folio_test_unevictable(folio) ||  in folio_activate()
298 	    !folio_test_lru(folio))  in folio_activate()
301 	folio_batch_add_and_move(folio, lru_activate);  in folio_activate()
309 void folio_activate(struct folio *folio)  in folio_activate()  argument
313 	if (!folio_test_clear_lru(folio))  in folio_activate()
316 	lruvec = folio_lruvec_lock_irq(folio);  in folio_activate()
317 	lru_activate(lruvec, folio);  in folio_activate()
319 	folio_set_lru(folio);  in folio_activate()
323 static void __lru_cache_activate_folio(struct folio *folio)  in __lru_cache_activate_folio()  argument
342 		struct folio *batch_folio = fbatch->folios[i];  in __lru_cache_activate_folio()
344 		if (batch_folio == folio) {  in __lru_cache_activate_folio()
345 			folio_set_active(folio);  in __lru_cache_activate_folio()
355 static void lru_gen_inc_refs(struct folio *folio)  in lru_gen_inc_refs()  argument
357 	unsigned long new_flags, old_flags = READ_ONCE(folio->flags.f);  in lru_gen_inc_refs()
359 	if (folio_test_unevictable(folio))  in lru_gen_inc_refs()
363 	if (!folio_test_referenced(folio)) {  in lru_gen_inc_refs()
364 		set_mask_bits(&folio->flags.f, LRU_REFS_MASK, BIT(PG_referenced));  in lru_gen_inc_refs()
370 			if (!folio_test_workingset(folio))  in lru_gen_inc_refs()
371 				folio_set_workingset(folio);  in lru_gen_inc_refs()
376 	} while (!try_cmpxchg(&folio->flags.f, &old_flags, new_flags));  in lru_gen_inc_refs()
379 static bool lru_gen_clear_refs(struct folio *folio)  in lru_gen_clear_refs()  argument
381 	int gen = folio_lru_gen(folio);  in lru_gen_clear_refs()
382 	int type = folio_is_file_lru(folio);  in lru_gen_clear_refs()
388 	set_mask_bits(&folio->flags.f, LRU_REFS_FLAGS | BIT(PG_workingset), 0);  in lru_gen_clear_refs()
391 	seq = READ_ONCE(folio_lruvec(folio)->lrugen.min_seq[type]);  in lru_gen_clear_refs()
399 static void lru_gen_inc_refs(struct folio *folio)  in lru_gen_inc_refs()  argument
403 static bool lru_gen_clear_refs(struct folio *folio)  in lru_gen_clear_refs()  argument
423 void folio_mark_accessed(struct folio *folio)  in folio_mark_accessed()  argument
425 	if (folio_test_dropbehind(folio))  in folio_mark_accessed()
428 		lru_gen_inc_refs(folio);  in folio_mark_accessed()
432 	if (!folio_test_referenced(folio)) {  in folio_mark_accessed()
433 		folio_set_referenced(folio);  in folio_mark_accessed()
434 	} else if (folio_test_unevictable(folio)) {  in folio_mark_accessed()
440 	} else if (!folio_test_active(folio)) {  in folio_mark_accessed()
447 		if (folio_test_lru(folio))  in folio_mark_accessed()
448 			folio_activate(folio);  in folio_mark_accessed()
450 			__lru_cache_activate_folio(folio);  in folio_mark_accessed()
451 		folio_clear_referenced(folio);  in folio_mark_accessed()
452 		workingset_activation(folio);  in folio_mark_accessed()
454 	if (folio_test_idle(folio))  in folio_mark_accessed()
455 		folio_clear_idle(folio);  in folio_mark_accessed()
468 void folio_add_lru(struct folio *folio)  in folio_add_lru()  argument
470 	VM_BUG_ON_FOLIO(folio_test_active(folio) &&  in folio_add_lru()
471 			folio_test_unevictable(folio), folio);  in folio_add_lru()
472 	VM_BUG_ON_FOLIO(folio_test_lru(folio), folio);  in folio_add_lru()
481 	if (lru_gen_enabled() && !folio_test_unevictable(folio) &&  in folio_add_lru()
483 		if (folio_test_workingset(folio))  in folio_add_lru()
484 			folio_set_active(folio);  in folio_add_lru()
485 		else if (!folio_test_referenced(folio))  in folio_add_lru()
486 			folio_mark_accessed(folio);  in folio_add_lru()
489 	folio_batch_add_and_move(folio, lru_add);  in folio_add_lru()
501 void folio_add_lru_vma(struct folio *folio, struct vm_area_struct *vma)  in folio_add_lru_vma()  argument
503 	VM_BUG_ON_FOLIO(folio_test_lru(folio), folio);  in folio_add_lru_vma()
506 		mlock_new_folio(folio);  in folio_add_lru_vma()
508 		folio_add_lru(folio);  in folio_add_lru_vma()
532 static void lru_deactivate_file(struct lruvec *lruvec, struct folio *folio)  in lru_deactivate_file()  argument
534 	bool active = folio_test_active(folio) || lru_gen_enabled();  in lru_deactivate_file()
535 	long nr_pages = folio_nr_pages(folio);  in lru_deactivate_file()
537 	if (folio_test_unevictable(folio))  in lru_deactivate_file()
541 	if (folio_mapped(folio))  in lru_deactivate_file()
544 	lruvec_del_folio(lruvec, folio);  in lru_deactivate_file()
545 	folio_clear_active(folio);  in lru_deactivate_file()
546 	folio_clear_referenced(folio);  in lru_deactivate_file()
548 	if (folio_test_writeback(folio) || folio_test_dirty(folio)) {  in lru_deactivate_file()
555 		lruvec_add_folio(lruvec, folio);  in lru_deactivate_file()
556 		folio_set_reclaim(folio);  in lru_deactivate_file()
562 		lruvec_add_folio_tail(lruvec, folio);  in lru_deactivate_file()
573 static void lru_deactivate(struct lruvec *lruvec, struct folio *folio)  in lru_deactivate()  argument
575 	long nr_pages = folio_nr_pages(folio);  in lru_deactivate()
577 	if (folio_test_unevictable(folio) || !(folio_test_active(folio) || lru_gen_enabled()))  in lru_deactivate()
580 	lruvec_del_folio(lruvec, folio);  in lru_deactivate()
581 	folio_clear_active(folio);  in lru_deactivate()
582 	folio_clear_referenced(folio);  in lru_deactivate()
583 	lruvec_add_folio(lruvec, folio);  in lru_deactivate()
589 static void lru_lazyfree(struct lruvec *lruvec, struct folio *folio)  in lru_lazyfree()  argument
591 	long nr_pages = folio_nr_pages(folio);  in lru_lazyfree()
593 	if (!folio_test_anon(folio) || !folio_test_swapbacked(folio) ||  in lru_lazyfree()
594 	    folio_test_swapcache(folio) || folio_test_unevictable(folio))  in lru_lazyfree()
597 	lruvec_del_folio(lruvec, folio);  in lru_lazyfree()
598 	folio_clear_active(folio);  in lru_lazyfree()
600 		lru_gen_clear_refs(folio);  in lru_lazyfree()
602 		folio_clear_referenced(folio);  in lru_lazyfree()
608 	folio_clear_swapbacked(folio);  in lru_lazyfree()
609 	lruvec_add_folio(lruvec, folio);  in lru_lazyfree()
667 void deactivate_file_folio(struct folio *folio)  in deactivate_file_folio()  argument
670 	if (folio_test_unevictable(folio) || !folio_test_lru(folio))  in deactivate_file_folio()
673 	if (lru_gen_enabled() && lru_gen_clear_refs(folio))  in deactivate_file_folio()
676 	folio_batch_add_and_move(folio, lru_deactivate_file);  in deactivate_file_folio()
687 void folio_deactivate(struct folio *folio)  in folio_deactivate()  argument
689 	if (folio_test_unevictable(folio) || !folio_test_lru(folio))  in folio_deactivate()
692 	if (lru_gen_enabled() ? lru_gen_clear_refs(folio) : !folio_test_active(folio))  in folio_deactivate()
695 	folio_batch_add_and_move(folio, lru_deactivate);  in folio_deactivate()
705 void folio_mark_lazyfree(struct folio *folio)  in folio_mark_lazyfree()  argument
707 	if (!folio_test_anon(folio) || !folio_test_swapbacked(folio) ||  in folio_mark_lazyfree()
708 	    !folio_test_lru(folio) ||  in folio_mark_lazyfree()
709 	    folio_test_swapcache(folio) || folio_test_unevictable(folio))  in folio_mark_lazyfree()
712 	folio_batch_add_and_move(folio, lru_lazyfree);  in folio_mark_lazyfree()
907 void lru_cache_drain_for_folio(const struct folio *folio,  in lru_cache_drain_for_folio()  argument
910 	if (!folio_may_be_lru_cached(folio))  in lru_cache_drain_for_folio()
914 		if (folio_ref_count(folio) ==  in lru_cache_drain_for_folio()
915 		    folio_expected_ref_count(folio) + extra_refs)  in lru_cache_drain_for_folio()
922 		if (folio_ref_count(folio) ==  in lru_cache_drain_for_folio()
923 		    folio_expected_ref_count(folio) + extra_refs)  in lru_cache_drain_for_folio()
988 		struct folio *folio = folios->folios[i];  in folios_put_refs()  local
992 		if (!folio)  in folios_put_refs()
995 		if (is_huge_zero_folio(folio))  in folios_put_refs()
998 		if (folio_is_zone_device(folio)) {  in folios_put_refs()
1003 			if (folio_ref_sub_and_test(folio, nr_refs))  in folios_put_refs()
1004 				free_zone_device_folio(folio);  in folios_put_refs()
1008 		if (!folio_ref_sub_and_test(folio, nr_refs))  in folios_put_refs()
1012 		if (folio_test_hugetlb(folio)) {  in folios_put_refs()
1017 			free_huge_folio(folio);  in folios_put_refs()
1020 		folio_unqueue_deferred_split(folio);  in folios_put_refs()
1021 		__page_cache_release(folio, &lruvec, &flags);  in folios_put_refs()
1024 			folios->folios[j] = folio;  in folios_put_refs()
1062 		struct folio *folio = page_folio(encoded_page_ptr(encoded[i]));  in release_pages()  local
1070 		if (folio_batch_add(&fbatch, folio) > 0)  in release_pages()
1114 		struct folio *folio = fbatch->folios[i];  in folio_batch_remove_exceptionals()  local
1115 		if (!xa_is_value(folio))  in folio_batch_remove_exceptionals()
1116 			fbatch->folios[j++] = folio;  in folio_batch_remove_exceptionals()