linux/mm/vmscan.c

3287 	int new_gen, old_gen = lru_gen_from_seq(lrugen->min_seq[type]);
3293 		new_gen = ((old_flags & LRU_GEN_MASK) >> LRU_GEN_PGOFF) - 1;
3295 		if (new_gen >= 0 && new_gen != old_gen)
3296 			return new_gen;
3298 		new_gen = (old_gen + 1) % MAX_NR_GENS;
3301 		new_flags |= (new_gen + 1UL) << LRU_GEN_PGOFF;
3307 	lru_gen_update_size(lruvec, folio, old_gen, new_gen);
3309 	return new_gen;
3313 			      int old_gen, int new_gen)
3320 	VM_WARN_ON_ONCE(new_gen >= MAX_NR_GENS);
3325 	walk->nr_pages[new_gen][type][zone] += delta;
3498 			      int new_gen, bool dirty)
3511 		old_gen = folio_update_gen(folio, new_gen);
3512 		if (old_gen >= 0 && old_gen != new_gen)
3513 			update_batch_size(walk, folio, old_gen, new_gen);
3516 		if (old_gen >= 0 && old_gen != new_gen)
3879 	int new_gen, old_gen = lru_gen_from_seq(lrugen->min_seq[type]);
3903 			new_gen = folio_inc_gen(lruvec, folio, false);
3904 			list_move_tail(&folio->lru, &lrugen->folios[new_gen][type][zone]);