diff --git a/osp/src/ospLog.c b/osp/src/ospLog.c
index 6697e20..ed425b2 100644
--- a/osp/src/ospLog.c
+++ b/osp/src/ospLog.c
@@ -203,7 +203,7 @@ OSP_STATUS osp_update_log(uint32_t len, uint32_t logid, uint32_t msg_type)
     char msg_name[10]   = {0};
     int32_t file_idx    = 0;
     uint32_t type       = 0;
-    //uint32_t ulfreeram = 0;
+    uint32_t fd         = 0;
 
     if (logid >= MAX_LOG_CFG_NUM || logid < 0)
     {
@@ -221,15 +221,11 @@ OSP_STATUS osp_update_log(uint32_t len, uint32_t logid, uint32_t msg_type)
     //p_log_file_cfg = &log_file_cfg_table[0][0];
     p_log_file_cfg[logid][type].cur_sum_len += len;
 
-    osp_get_current_time();
     UCP_PRINT_LOG("osp_update_log logid:%d type:0x%x cur_sum_len:%u max_file_size_M:%u !\n", logid,type, p_log_file_cfg[logid][type].cur_sum_len, p_log_file_cfg[logid][type].max_file_size_M);
 
     /*判断当前系统是否还有足够空间*/
-    //ulfreeram = osp_get_freeram();
     if(1 == g_ucFflushEnable)
     {
-        //sprintf(name, "rm -rf %s%u-%u-%s.log", p_log_file_cfg[logid][type].logname, (p_log_file_cfg[logid][type].cur_file_idx & 0x7)+1, logid, msg_name);
-        //system(name);
         UCP_PRINT_LOG("osp_update_log line:%d logid:%d type:0x%x g_ucFflushEnable:%u name:%s\n", __LINE__, logid, type, g_ucFflushEnable, name);
         osp_log_cfg_reload();
     }
@@ -257,7 +253,12 @@ OSP_STATUS osp_update_log(uint32_t len, uint32_t logid, uint32_t msg_type)
             return OSP_ERROR;
         }
 
+        /*内核缓存同步文件，手动清理内核buff*/
+        fd = fileno(p_log_file_cfg[logid][type].file);
+        fsync(fd);
         fclose(p_log_file_cfg[logid][type].file);
+        strcpy(name, "echo 1 > /proc/sys/vm/drop_caches");
+        system(name);
 
         osp_get_file_path(p_log_file_cfg[logid][type].logname, path);
 
@@ -1007,9 +1008,11 @@ void osp_log_init(void)
 
 void osp_log_cfg_reload()
 {
-    uint32_t i = 0;
-    uint32_t j = 0;
-    
+    uint32_t i   = 0;
+    uint32_t j   = 0;
+    uint32_t fd  = 0;
+    char cmd[64] = {0};
+
     for (i = 0; i < MAX_LOG_CFG_NUM; i++)
     {
         for(j = 0; j< 4; j++)
@@ -1018,11 +1021,20 @@ void osp_log_cfg_reload()
             log_file_cfg_table[i][j].key                = 0;
             log_file_cfg_table[i][j].cur_sum_len        = 0;
             log_file_cfg_table[i][j].cur_file_idx       = 0;
-            log_file_cfg_table[i][j].file               = NULL;
+            if(NULL != log_file_cfg_table[i][j].file)
+            {
+                fd = fileno(log_file_cfg_table[i][j].file);
+                fsync(fd);
+                fclose(log_file_cfg_table[i][j].file);
+                log_file_cfg_table[i][j].file = NULL;
+            }
         }
 
     }
 
+    strcpy(cmd, "echo 1 > /proc/sys/vm/drop_caches");
+    system(cmd);
+    
     return;
 }