ftl: temporarily disable reading the cached va in trace_path()

source/ftl/map.c

@@ -382,7 +382,9 @@ int trace_path(struct ftl_map *map, struct ftl_page_desc *new_page_desc,
 	uint8_t depth = 0;
 	uint32_t upage = map->root;
 
-	if ((map->flags & FTL_CACHED_VA) && map->last_va == va) {
+#if 0
+	/* FIXME */
+	if (!new_page_desc && (map->flags & FTL_CACHED_VA) && map->last_va == va) {
 		if (map->flags & FTL_UNMAPPED)
 			return -1;
 
@@ -391,6 +393,9 @@ int trace_path(struct ftl_map *map, struct ftl_page_desc *new_page_desc,
 
 		return 0;
 	}
+#endif
+
+	map->flags &= ~(FTL_CACHED_VA | FTL_UNMAPPED);
 
 	if (new_page_desc)
 		new_page_desc->va = va;
@@ -428,7 +433,6 @@ int trace_path(struct ftl_map *map, struct ftl_page_desc *new_page_desc,
 		*page = upage;
 
 	map->flags |= FTL_CACHED_VA;
-	map->flags &= ~FTL_UNMAPPED;
 	map->last_va = va;
 	map->last_pa = upage;