diff --git a/Makefile b/Makefile
index a941c7fc..1a87b4c1 100644
--- a/Makefile
+++ b/Makefile
@@ -7,7 +7,7 @@ export ARCH=__x86_64__
 export ROOT_PATH=$(shell pwd)
 
 export DEBUG=DEBUG
-export GLOBAL_CFLAGS := -mcmodel=large -fno-builtin -m64  -fno-stack-protector -D $(ARCH)
+export GLOBAL_CFLAGS := -mcmodel=large -fno-builtin -m64  -fno-stack-protector -D $(ARCH) -O1
 
 ifeq ($(DEBUG), DEBUG)
 GLOBAL_CFLAGS += -g 
diff --git a/kernel/Makefile b/kernel/Makefile
index 5bae80f9..c813e863 100644
--- a/kernel/Makefile
+++ b/kernel/Makefile
@@ -10,7 +10,7 @@ LIB_FILES := $(foreach DIR,$(DIR_LIB),$(addprefix $(DIR)/,$(lib_patterns)))
 
 # 控制操作系统使用的中断控制器 _INTR_8259A_ _INTR_APIC_
 PIC := _INTR_APIC_
-CFLAGS = $(GLOBAL_CFLAGS) -D $(PIC) -I $(shell pwd)  -O3
+CFLAGS = $(GLOBAL_CFLAGS) -D $(PIC) -I $(shell pwd)
 
 export ASFLAGS := --64
 
diff --git a/kernel/common/printk.c b/kernel/common/printk.c
index 46564fd4..a2414a80 100644
--- a/kernel/common/printk.c
+++ b/kernel/common/printk.c
@@ -10,8 +10,7 @@
 #include <driver/uart/uart.h>
 #include <driver/video/video.h>
 #include "math.h"
-#pragma GCC push_options
-#pragma GCC optimize("O0")
+
 struct printk_screen_info pos;
 extern ul VBE_FB_phys_addr; // 由bootloader传来的帧缓存区的物理地址
 static spinlock_t printk_lock;
@@ -46,6 +45,8 @@ static uint *get_pos_VBE_FB_addr();
  */
 static int cls();
 
+#pragma GCC push_options
+#pragma GCC optimize("O0")
 /**
  * @brief 滚动窗口（尚不支持向下滚动)
  *
@@ -54,7 +55,7 @@ static int cls();
  * @param animation 是否包含滑动动画
  */
 static int scroll(bool direction, int pixels, bool animation);
-
+#pragma GCC pop_options
 /**
  * @brief 将数字按照指定的要求转换成对应的字符串（2~36进制）
  *
@@ -960,4 +961,3 @@ int sprintk(char *buf, const char *fmt, ...)
     return count;
 }
 
-#pragma GCC pop_options
\ No newline at end of file