1 files changed, 45 insertions, 38 deletions

diff --git a/mm/swap.c b/mm/swap.c
index 4fc322f7111a..b74ebe865dd9 100644
--- a/mm/swap.c
+++ b/mm/swap.c
@@ -164,6 +164,10 @@ static void folio_batch_move_lru(struct folio_batch *fbatch, move_fn_t move_fn)
 	for (i = 0; i < folio_batch_count(fbatch); i++) {
 		struct folio *folio = fbatch->folios[i];
 
+		/* block memcg migration while the folio moves between lru */
+		if (move_fn != lru_add && !folio_test_clear_lru(folio))
+			continue;
+
 		folio_lruvec_relock_irqsave(folio, &lruvec, &flags);
 		move_fn(lruvec, folio);
 
@@ -176,14 +180,10 @@ static void folio_batch_move_lru(struct folio_batch *fbatch, move_fn_t move_fn)
 }
 
 static void __folio_batch_add_and_move(struct folio_batch __percpu *fbatch,
-		struct folio *folio, move_fn_t move_fn,
-		bool on_lru, bool disable_irq)
+		struct folio *folio, move_fn_t move_fn, bool disable_irq)
 {
 	unsigned long flags;
 
-	if (on_lru && !folio_test_clear_lru(folio))
-		return;
-
 	folio_get(folio);
 
 	if (disable_irq)
@@ -191,8 +191,8 @@ static void __folio_batch_add_and_move(struct folio_batch __percpu *fbatch,
 	else
 		local_lock(&cpu_fbatches.lock);
 
-	if (!folio_batch_add(this_cpu_ptr(fbatch), folio) || folio_test_large(folio) ||
-	    lru_cache_disabled())
+	if (!folio_batch_add(this_cpu_ptr(fbatch), folio) ||
+			!folio_may_be_lru_cached(folio) || lru_cache_disabled())
 		folio_batch_move_lru(this_cpu_ptr(fbatch), move_fn);
 
 	if (disable_irq)
@@ -201,13 +201,13 @@ static void __folio_batch_add_and_move(struct folio_batch __percpu *fbatch,
 		local_unlock(&cpu_fbatches.lock);
 }
 
-#define folio_batch_add_and_move(folio, op, on_lru)						\
-	__folio_batch_add_and_move(								\
-		&cpu_fbatches.op,								\
-		folio,										\
-		op,										\
-		on_lru,										\
-		offsetof(struct cpu_fbatches, op) >= offsetof(struct cpu_fbatches, lock_irq)	\
+#define folio_batch_add_and_move(folio, op)		\
+	__folio_batch_add_and_move(			\
+		&cpu_fbatches.op,			\
+		folio,					\
+		op,					\
+		offsetof(struct cpu_fbatches, op) >=	\
+		offsetof(struct cpu_fbatches, lock_irq)	\
 	)
 
 static void lru_move_tail(struct lruvec *lruvec, struct folio *folio)
@@ -231,14 +231,15 @@ static void lru_move_tail(struct lruvec *lruvec, struct folio *folio)
 void folio_rotate_reclaimable(struct folio *folio)
 {
 	if (folio_test_locked(folio) || folio_test_dirty(folio) ||
-	    folio_test_unevictable(folio))
+	    folio_test_unevictable(folio) || !folio_test_lru(folio))
 		return;
 
-	folio_batch_add_and_move(folio, lru_move_tail, true);
+	folio_batch_add_and_move(folio, lru_move_tail);
 }
 
-void lru_note_cost(struct lruvec *lruvec, bool file,
-		   unsigned int nr_io, unsigned int nr_rotated)
+void lru_note_cost_unlock_irq(struct lruvec *lruvec, bool file,
+		unsigned int nr_io, unsigned int nr_rotated)
+		__releases(lruvec->lru_lock)
 {
 	unsigned long cost;
 
@@ -250,18 +251,14 @@ void lru_note_cost(struct lruvec *lruvec, bool file,
 	 * different between them, adjust scan balance for CPU work.
 	 */
 	cost = nr_io * SWAP_CLUSTER_MAX + nr_rotated;
+	if (!cost) {
+		spin_unlock_irq(&lruvec->lru_lock);
+		return;
+	}
 
-	do {
+	for (;;) {
 		unsigned long lrusize;
 
-		/*
-		 * Hold lruvec->lru_lock is safe here, since
-		 * 1) The pinned lruvec in reclaim, or
-		 * 2) From a pre-LRU page during refault (which also holds the
-		 *    rcu lock, so would be safe even if the page was on the LRU
-		 *    and could move simultaneously to a new lruvec).
-		 */
-		spin_lock_irq(&lruvec->lru_lock);
 		/* Record cost event */
 		if (file)
 			lruvec->file_cost += cost;
@@ -285,14 +282,22 @@ void lru_note_cost(struct lruvec *lruvec, bool file,
 			lruvec->file_cost /= 2;
 			lruvec->anon_cost /= 2;
 		}
+
 		spin_unlock_irq(&lruvec->lru_lock);
-	} while ((lruvec = parent_lruvec(lruvec)));
+		lruvec = parent_lruvec(lruvec);
+		if (!lruvec)
+			break;
+		spin_lock_irq(&lruvec->lru_lock);
+	}
 }
 
 void lru_note_cost_refault(struct folio *folio)
 {
-	lru_note_cost(folio_lruvec(folio), folio_is_file_lru(folio),
-		      folio_nr_pages(folio), 0);
+	struct lruvec *lruvec;
+
+	lruvec = folio_lruvec_lock_irq(folio);
+	lru_note_cost_unlock_irq(lruvec, folio_is_file_lru(folio),
+				folio_nr_pages(folio), 0);
 }
 
 static void lru_activate(struct lruvec *lruvec, struct folio *folio)
@@ -323,10 +328,11 @@ static void folio_activate_drain(int cpu)
 
 void folio_activate(struct folio *folio)
 {
-	if (folio_test_active(folio) || folio_test_unevictable(folio))
+	if (folio_test_active(folio) || folio_test_unevictable(folio) ||
+	    !folio_test_lru(folio))
 		return;
 
-	folio_batch_add_and_move(folio, lru_activate, true);
+	folio_batch_add_and_move(folio, lru_activate);
 }
 
 #else
@@ -502,7 +508,7 @@ void folio_add_lru(struct folio *folio)
 	    lru_gen_in_fault() && !(current->flags & PF_MEMALLOC))
 		folio_set_active(folio);
 
-	folio_batch_add_and_move(folio, lru_add, false);
+	folio_batch_add_and_move(folio, lru_add);
 }
 EXPORT_SYMBOL(folio_add_lru);
 
@@ -680,13 +686,13 @@ void lru_add_drain_cpu(int cpu)
 void deactivate_file_folio(struct folio *folio)
 {
 	/* Deactivating an unevictable folio will not accelerate reclaim */
-	if (folio_test_unevictable(folio))
+	if (folio_test_unevictable(folio) || !folio_test_lru(folio))
 		return;
 
 	if (lru_gen_enabled() && lru_gen_clear_refs(folio))
 		return;
 
-	folio_batch_add_and_move(folio, lru_deactivate_file, true);
+	folio_batch_add_and_move(folio, lru_deactivate_file);
 }
 
 /*
@@ -699,13 +705,13 @@ void deactivate_file_folio(struct folio *folio)
  */
 void folio_deactivate(struct folio *folio)
 {
-	if (folio_test_unevictable(folio))
+	if (folio_test_unevictable(folio) || !folio_test_lru(folio))
 		return;
 
 	if (lru_gen_enabled() ? lru_gen_clear_refs(folio) : !folio_test_active(folio))
 		return;
 
-	folio_batch_add_and_move(folio, lru_deactivate, true);
+	folio_batch_add_and_move(folio, lru_deactivate);
 }
 
 /**
@@ -718,10 +724,11 @@ void folio_deactivate(struct folio *folio)
 void folio_mark_lazyfree(struct folio *folio)
 {
 	if (!folio_test_anon(folio) || !folio_test_swapbacked(folio) ||
+	    !folio_test_lru(folio) ||
 	    folio_test_swapcache(folio) || folio_test_unevictable(folio))
 		return;
 
-	folio_batch_add_and_move(folio, lru_lazyfree, true);
+	folio_batch_add_and_move(folio, lru_lazyfree);
 }
 
 void lru_add_drain(void)