--- ./source/private_module/spa/space_mgr/extent_mgr_intf.c	2018-02-09 13:47:03.000000000 +0000
+++ ./source/private_module/spa/space_mgr/extent_mgr_intf.c.hotpatch	2018-11-16 12:38:02.000000000 +0000
@@ -3877,7 +3877,6 @@
                          volumeObj->key.volumeId, PVT_SPA_EXT_EXTENT_ID(req));
     }
     copyTraceKey2Trace(getTraceFromReq(req), spaGetTraceFromContext(context));
-
     if (RETURN_OK != req->result)
     {
         SPA_LIMIT_PRINT_ERROR(SPACE_MGR_ID01B9, "Query extent(0x%llx) of volume(0x%llx) bitmap"
@@ -3887,7 +3886,8 @@
                               PVT_SPA_EXT_POOL_ID(req),
                               req->result);
     }
-
+    DBG_LogDebug(DBG_LOGID_NEW, "Query volume 0x%llx extent 0x%llx bitmap over, return %d.", 
+                                PVT_SPA_EXT_VOLUME_ID(req), PVT_SPA_EXT_EXTENT_ID(req), req->result);
     /* ٶvolumeü */
     /* callbackǰdtͳ */
     putMobj(volumeObj);
@@ -6538,8 +6538,7 @@
     /* C20: ȡݿռ, ռĵַ, ͷſռʱ, ݿռַռַ */
     initExtentInfo = (INIT_EXTENT_INFO_S *)getData(initExtInfoContext);
     tmpContext = (CONTEXT_S **)(void *)((char *)initExtentInfo + sizeof(INIT_EXTENT_INFO_S) * SPACE_MGR_BATCH_OP_NUM);
-    *tmpContext = initExtInfoContext;
-    
+    *tmpContext = initExtInfoContext;   
     req->opCode = OP_QUERY_EXTENT_BITMAP;
     PVT_SPA_EXT_POOL_ID(req)        = poolId;
     PVT_SPA_EXT_META_OBJ(req)       = volObj;
@@ -6552,7 +6551,8 @@
     PVT_SPA_EXT_BATCH_OP_NUM(req)   = 1;
     /*  */
     ADD_RECE_INTF_OP_NUM(req->opCode);
-
+    DBG_LogDebug(DBG_LOGID_NEW, "Begin to query extent(pool %u volumid 0x%llx extent 0x%llx) init bitmap", 
+                poolId, volumeId, extentId);
     initQueryExtentBitmapAction(req);
     SCHEDULE_SPACE_EXTENT_REQ(req);
     
--- ./source/private_module/spa/space_mgr/extent_mgr_meta.c	2018-02-09 13:47:03.000000000 +0000
+++ ./source/private_module/spa/space_mgr/extent_mgr_meta.c.hotpatch	2018-11-16 12:38:02.000000000 +0000
@@ -341,13 +341,13 @@
     /* ѯMetaǷΪȫFFֻKeyֵ */
     metaObj = PVT_SPA_EXT_META_OBJ(req); 
     opNum   = PVT_SPA_EXT_BATCH_OP_META_NUM(req);
-    
     switch (metaObj->key.type)
     {
         case MOBJ_VOL_EXTENT:
             ret = checkVolumeExtentMeta(meta, opNum, req->parent);
             break;
         case MOBJ_VOL_EXTENT_INIT_SET:
+            DBG_LogDebug(DBG_LOGID_NEW, "Query extent init bitmap return.");
             ret = checkExtentInitMeta(meta, opNum, req->parent);
             break;
         case MOBJ_VOL_MIGRATE_EXTENT:
--- ./source/private_module/spa/space_mgr/extent_mgr_obj.c	2018-02-09 13:47:03.000000000 +0000
+++ ./source/private_module/spa/space_mgr/extent_mgr_obj.c.hotpatch	2018-11-16 12:38:02.000000000 +0000
@@ -1617,7 +1617,7 @@
 
         return RETURN_ERROR;
     }
-
+    DBG_LogDebug(DBG_LOGID_NEW, "Query extent bitmap tree(poolid %u volumeid 0x%llx) start.", poolId, volumeId);
     childReq->parent = req;
     atomic_inc(&req->notBackNum); 
 
