Merge v6.18.51linux-rolling-lts

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 7 insertions, 34 deletions

diff --git a/mm/vmscan.c b/mm/vmscan.c
index 05027b320eda..2c66fbcd6e84 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -1312,7 +1312,8 @@ retry:
 					goto keep_locked;
 				if (folio_test_large(folio)) {
 					/* cannot split folio, skip it */
-					if (!can_split_folio(folio, 1, NULL))
+					if (folio_expected_ref_count(folio) !=
+					    folio_ref_count(folio) - 1)
 						goto activate_locked;
 					/*
 					 * Split partially mapped folios right away.
@@ -4468,8 +4469,6 @@ void lru_gen_soft_reclaim(struct mem_cgroup *memcg, int nid)
 static bool sort_folio(struct lruvec *lruvec, struct folio *folio, struct scan_control *sc,
 		       int tier_idx)
 {
-	bool success;
-	bool dirty, writeback;
 	int gen = folio_lru_gen(folio);
 	int type = folio_is_file_lru(folio);
 	int zone = folio_zonenum(folio);
@@ -4481,15 +4480,9 @@ static bool sort_folio(struct lruvec *lruvec, struct folio *folio, struct scan_c
 
 	VM_WARN_ON_ONCE_FOLIO(gen >= MAX_NR_GENS, folio);
 
-	/* unevictable */
-	if (!folio_evictable(folio)) {
-		success = lru_gen_del_folio(lruvec, folio, true);
-		VM_WARN_ON_ONCE_FOLIO(!success, folio);
-		folio_set_unevictable(folio);
-		lruvec_add_folio(lruvec, folio);
-		__count_vm_events(UNEVICTABLE_PGCULLED, delta);
-		return true;
-	}
+	/* unevictable: let it through and the generic path will cull it */
+	if (!folio_evictable(folio))
+		return false;
 
 	/* promoted */
 	if (gen != lru_gen_from_seq(lrugen->min_seq[type])) {
@@ -4519,21 +4512,6 @@ static bool sort_folio(struct lruvec *lruvec, struct folio *folio, struct scan_c
 		return true;
 	}
 
-	dirty = folio_test_dirty(folio);
-	writeback = folio_test_writeback(folio);
-	if (type == LRU_GEN_FILE && dirty) {
-		sc->nr.file_taken += delta;
-		if (!writeback)
-			sc->nr.unqueued_dirty += delta;
-	}
-
-	/* waiting for writeback */
-	if (writeback || (type == LRU_GEN_FILE && dirty)) {
-		gen = folio_inc_gen(lruvec, folio, true);
-		list_move(&folio->lru, &lrugen->folios[gen][type][zone]);
-		return true;
-	}
-
 	return false;
 }
 
@@ -4561,9 +4539,6 @@ static bool isolate_folio(struct lruvec *lruvec, struct folio *folio, struct sca
 	if (!folio_test_referenced(folio))
 		set_mask_bits(&folio->flags.f, LRU_REFS_MASK, 0);
 
-	/* for shrink_folio_list() */
-	folio_clear_reclaim(folio);
-
 	success = lru_gen_del_folio(lruvec, folio, true);
 	VM_WARN_ON_ONCE_FOLIO(!success, folio);
 
@@ -4757,11 +4732,9 @@ retry:
 	list_for_each_entry_safe_reverse(folio, next, &list, lru) {
 		DEFINE_MIN_SEQ(lruvec);
 
-		if (!folio_evictable(folio)) {
-			list_del(&folio->lru);
-			folio_putback_lru(folio);
+		/* move_folios_to_lru() culls unevictable folios via folio_putback_lru() */
+		if (!folio_evictable(folio))
 			continue;
-		}
 
 		/* retry folios that may have missed folio_rotate_reclaimable() */
 		if (!skip_retry && !folio_test_active(folio) && !folio_mapped(folio) &&