linux-master/mm/vmscan.c

3128 	int new_gen, old_gen = lru_gen_from_seq(lrugen->min_seq[type]);
3134 		new_gen = ((old_flags & LRU_GEN_MASK) >> LRU_GEN_PGOFF) - 1;
3136 		if (new_gen >= 0 && new_gen != old_gen)
3137 			return new_gen;
3139 		new_gen = (old_gen + 1) % MAX_NR_GENS;
3142 		new_flags |= (new_gen + 1UL) << LRU_GEN_PGOFF;
3148 	lru_gen_update_size(lruvec, folio, old_gen, new_gen);
3150 	return new_gen;
3154 			      int old_gen, int new_gen)
3161 	VM_WARN_ON_ONCE(new_gen >= MAX_NR_GENS);
3166 	walk->nr_pages[new_gen][type][zone] += delta;
3343 	int old_gen, new_gen = lru_gen_from_seq(max_seq);
3387 		old_gen = folio_update_gen(folio, new_gen);
3388 		if (old_gen >= 0 && old_gen != new_gen)
3389 			update_batch_size(walk, folio, old_gen, new_gen);
3411 	int old_gen, new_gen = lru_gen_from_seq(max_seq);
3467 		old_gen = folio_update_gen(folio, new_gen);
3468 		if (old_gen >= 0 && old_gen != new_gen)
3469 			update_batch_size(walk, folio, old_gen, new_gen);
3687 	int new_gen, old_gen = lru_gen_from_seq(lrugen->min_seq[type]);
3704 			new_gen = folio_inc_gen(lruvec, folio, false);
3705 			list_move_tail(&folio->lru, &lrugen->folios[new_gen][type][zone]);
4005 	int old_gen, new_gen = lru_gen_from_seq(max_seq);
4068 			old_gen = folio_update_gen(folio, new_gen);
4069 			if (old_gen >= 0 && old_gen != new_gen)
4070 				update_batch_size(walk, folio, old_gen, new_gen);
4078 		else if (old_gen != new_gen)