diff --git a/scanner/async_scanner.cpp b/scanner/async_scanner.cpp
index cf722f3..6e6ebdc 100644
--- a/scanner/async_scanner.cpp
+++ b/scanner/async_scanner.cpp
@@ -31,11 +31,14 @@ static void *(*old_malloc_hook)(size_t, const void *) = nullptr;
 static void (*old_free_hook)(void *ptr, const void *caller) = nullptr;
 static FILE*	g_mem_file = nullptr;
 static uint64_t	total_size = 0;
+static bool		record_ = false;
 static void * my_malloc_hook(size_t size, const void *caller)
 {
     void *result;
     /* Restore all old hooks */
     __malloc_hook = old_malloc_hook;
+	if(__malloc_hook == my_malloc_hook)
+		__malloc_hook = nullptr;
     /* Call recursively */
     result = malloc(size);
     /* Save underlying hooks */
@@ -50,12 +53,15 @@ static void * my_malloc_hook(size_t size, const void *caller)
 	else
 	    printf("+%p from %p (size = %u)\n", result, caller, size);
     /* Restore our own hooks */
+	if(record_)
     __malloc_hook = my_malloc_hook;
     return result;
 }
 static void my_free_hook(void *ptr, const void *caller)
 {
 	__free_hook = old_free_hook;
+	if(__free_hook == my_free_hook)
+		__free_hook = nullptr;
 	if(ptr)
 		free(ptr);
 	if(g_mem_file)
@@ -67,9 +73,10 @@ static void my_free_hook(void *ptr, const void *caller)
 	else
 	    printf("-%p from %p\n", ptr, caller);
 	old_free_hook = __free_hook;
+	if(record_)
 	__free_hook = my_free_hook;
 }
-static void record_malloc(bool enable)
+void record_malloc(bool enable)
 {
 	if(enable)
 	{
@@ -80,6 +87,7 @@ static void record_malloc(bool enable)
 		std::string log(utils::format_current_time() + "\n");
 		fwrite(log.c_str(), 1, log.length(), g_mem_file);
 
+		record_ = true;
 		old_free_hook = __free_hook;
 		__free_hook = my_free_hook;
 
@@ -88,21 +96,25 @@ static void record_malloc(bool enable)
 	}
 	else // if(old_malloc_hook)
 	{
+		printf("cancel log malloc.\n");
+		record_ = false;
+
+		// __malloc_hook = old_malloc_hook;
+		// old_malloc_hook = nullptr;
+
+		// __free_hook = old_free_hook;
+		// old_free_hook = nullptr;
+
 		if(g_mem_file)
 		{
-			std::string log(utils::format_current_time() + "\n");
-			fwrite(log.c_str(), 1, log.length(), g_mem_file);
+			// std::string log(utils::format_current_time() + "\n");
+			// fwrite(log.c_str(), 1, log.length(), g_mem_file);
 			fclose(g_mem_file);
 		}
 		g_mem_file = nullptr;
-
-		__malloc_hook = old_malloc_hook;
-		old_malloc_hook = nullptr;
-
-		__free_hook = old_free_hook;
-		old_free_hook = nullptr;
 	}
 }
+
 ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 // 
 async_scanner::async_scanner() : usb_(nullptr), cfg_mgr_(nullptr), scan_id_(0)
@@ -144,6 +156,7 @@ async_scanner::async_scanner() : usb_(nullptr), cfg_mgr_(nullptr), scan_id_(0)
 		{
 			cis_->close();
 			utils::print_memory_usage("Memory usage when finished scanning", false);
+			system("sudo cpufreq-set -g ondemand");
 		}
 
 		usb_->write_bulk(img);
@@ -563,7 +576,10 @@ dyn_mem_ptr async_scanner::handle_scan_start(LPPACK_BASE pack, uint32_t* used, p
 	if(scan_err_)
 	{
 		cis_->stop_scan();
-	}	
+		cis_->close();
+	}
+	else
+		system("echo performance > /sys/devices/system/cpu/cpu5/cpufreq/scaling_governor");
 	BASE_PACKET_REPLY(*((LPPACK_BASE)reply->ptr()), pack->cmd + 1, pack->pack_id, scan_err_);
 	((LPPACK_BASE)reply->ptr())->payload_len = config.length() + 2;
 	strcpy(((LPPACK_BASE)reply->ptr())->payload, config.c_str());
diff --git a/xmake.lua b/xmake.lua
index a01e383..fa30e19 100644
--- a/xmake.lua
+++ b/xmake.lua
@@ -60,8 +60,8 @@ add_packagedirs("sdk")
 add_defines("BUILD_AS_DEVICE")
 add_defines("VER_MAIN=2")
 add_defines("VER_FAMILY=200")
-add_defines("VER_DATE=20240127")
-add_defines("VER_BUILD=27")
+add_defines("VER_DATE=20240129")
+add_defines("VER_BUILD=8")
 
 target("conf")
     set_kind("phony")