--- x/fs/f2fs/gc.c
+++ y/fs/f2fs/gc.c
@@ -955,7 +955,8 @@ static int check_valid_map(struct f2fs_s
 	struct seg_entry *sentry;
 	int ret;
 
-	down_read(&sit_i->sentry_lock);
+	if (!down_read_trylock(&sit_i->sentry_lock))
+		return 0;
 	sentry = get_seg_entry(sbi, segno);
 	ret = f2fs_test_bit(offset, sentry->cur_valid_map);
 	up_read(&sit_i->sentry_lock);