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Qwen2.5-Coder-1.5B惊艳效果：多轮交互完成Linux内核模块代码编写

news 2026/3/26 17:42:52

Qwen2.5-Coder-1.5B惊艳效果：多轮交互完成Linux内核模块代码编写

注意：Qwen2.5-Coder-1.5B是一个基础代码生成模型，不适合直接进行对话交互。本文展示的是通过精心设计的代码生成提示词实现的多轮代码编写效果。

1. 模型能力概览

Qwen2.5-Coder-1.5B是阿里云最新推出的代码生成模型，虽然只有15亿参数，但在代码生成、代码推理和代码修复方面表现出色。这个模型专门针对编程任务优化，能够理解复杂的代码需求并生成高质量的代码。

核心特点：

参数规模：1.54B（非嵌入参数1.31B）
架构：28层Transformer，支持32K上下文长度
训练数据：5.5万亿token，包含源代码、文本-代码对和合成数据
专长领域：代码生成、代码补全、代码解释、代码修复

与传统的对话模型不同，Qwen2.5-Coder-1.5B专注于代码相关任务，在理解编程需求、生成语法正确的代码方面有着显著优势。它支持多种编程语言，包括C、C++、Python、Java、JavaScript等，特别适合系统级编程任务。

2. Linux内核模块编写实战展示

2.1 初始需求：创建一个简单的字符设备驱动

首先向模型提出一个具体的Linux内核模块开发需求：

提示词："请编写一个简单的Linux字符设备驱动模块，实现基本的open、release、read、write操作。设备名为'my_chardev'，主设备号动态分配。"

模型生成的代码：

#include <linux/module.h> #include <linux/kernel.h> #include <linux/fs.h> #include <linux/cdev.h> #include <linux/device.h> #include <linux/uaccess.h> #define DEVICE_NAME "my_chardev" #define CLASS_NAME "chardev" static int major_number; static struct class* char_class = NULL; static struct cdev my_cdev; static char message[1024] = {0}; static int message_size = 0; static int device_open(struct inode *inode, struct file *file) { printk(KERN_INFO "my_chardev: Device opened\n"); return 0; } static int device_release(struct inode *inode, struct file *file) { printk(KERN_INFO "my_chardev: Device closed\n"); return 0; } static ssize_t device_read(struct file *filp, char __user *buffer, size_t length, loff_t *offset) { int bytes_to_read; if (*offset >= message_size) return 0; bytes_to_read = min((size_t)(message_size - *offset), length); if (copy_to_user(buffer, message + *offset, bytes_to_read)) return -EFAULT; *offset += bytes_to_read; return bytes_to_read; } static ssize_t device_write(struct file *filp, const char __user *buffer, size_t length, loff_t *offset) { if (length > sizeof(message)) return -ENOMEM; if (copy_from_user(message, buffer, length)) return -EFAULT; message_size = length; *offset = length; printk(KERN_INFO "my_chardev: Received %zu bytes\n", length); return length; } static struct file_operations fops = { .owner = THIS_MODULE, .open = device_open, .release = device_release, .read = device_read, .write = device_write, }; static int __init chardev_init(void) { printk(KERN_INFO "my_chardev: Initializing module\n"); major_number = register_chrdev(0, DEVICE_NAME, &fops); if (major_number < 0) { printk(KERN_ALERT "my_chardev: Failed to register device\n"); return major_number; } char_class = class_create(THIS_MODULE, CLASS_NAME); if (IS_ERR(char_class)) { unregister_chrdev(major_number, DEVICE_NAME); printk(KERN_ALERT "my_chardev: Failed to create class\n"); return PTR_ERR(char_class); } device_create(char_class, NULL, MKDEV(major_number, 0), NULL, DEVICE_NAME); printk(KERN_INFO "my_chardev: Module loaded with major number %d\n", major_number); return 0; } static void __exit chardev_exit(void) { device_destroy(char_class, MKDEV(major_number, 0)); class_destroy(char_class); unregister_chrdev(major_number, DEVICE_NAME); printk(KERN_INFO "my_chardev: Module unloaded\n"); } module_init(chardev_init); module_exit(chardev_exit); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Qwen2.5-Coder"); MODULE_DESCRIPTION("Simple Character Device Driver");

2.2 功能扩展：添加IOCTL支持

第二轮提示词："请为上面的字符设备驱动添加IOCTL支持，实现一个简单的控制接口，可以清空缓冲区、获取缓冲区大小、设置缓冲区大小。"

模型生成的补充代码：

#include <linux/ioctl.h> #define IOCTL_MAGIC 'k' #define IOCTL_CLEAR_BUFFER _IO(IOCTL_MAGIC, 0) #define IOCTL_GET_BUFFER_SIZE _IOR(IOCTL_MAGIC, 1, int) #define IOCTL_SET_BUFFER_SIZE _IOW(IOCTL_MAGIC, 2, int) static long device_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) { int retval = 0; int new_size; switch (cmd) { case IOCTL_CLEAR_BUFFER: memset(message, 0, sizeof(message)); message_size = 0; printk(KERN_INFO "my_chardev: Buffer cleared\n"); break; case IOCTL_GET_BUFFER_SIZE: if (copy_to_user((int __user *)arg, &message_size, sizeof(message_size))) return -EFAULT; printk(KERN_INFO "my_chardev: Buffer size queried: %d\n", message_size); break; case IOCTL_SET_BUFFER_SIZE: if (copy_from_user(&new_size, (int __user *)arg, sizeof(new_size))) return -EFAULT; if (new_size < 0 || new_size > sizeof(message)) return -EINVAL; message_size = new_size; printk(KERN_INFO "my_chardev: Buffer size set to %d\n", message_size); break; default: return -ENOTTY; } return retval; } // 更新file_operations结构体 static struct file_operations fops = { .owner = THIS_MODULE, .open = device_open, .release = device_release, .read = device_read, .write = device_write, .unlocked_ioctl = device_ioctl, };

2.3 错误处理增强：完善健壮性

第三轮提示词："请增强错误处理，添加必要的资源分配检查，确保模块在初始化失败时能够正确清理已分配的资源。"

模型生成的改进代码：

static int __init chardev_init(void) { int retval = 0; dev_t dev = 0; printk(KERN_INFO "my_chardev: Initializing module\n"); // 分配主设备号 retval = alloc_chrdev_region(&dev, 0, 1, DEVICE_NAME); if (retval < 0) { printk(KERN_ALERT "my_chardev: Failed to allocate device number\n"); return retval; } major_number = MAJOR(dev); // 初始化cdev结构 cdev_init(&my_cdev, &fops); my_cdev.owner = THIS_MODULE; // 添加cdev到系统 retval = cdev_add(&my_cdev, dev, 1); if (retval < 0) { printk(KERN_ALERT "my_chardev: Failed to add cdev\n"); goto fail_cdev; } // 创建设备类 char_class = class_create(THIS_MODULE, CLASS_NAME); if (IS_ERR(char_class)) { retval = PTR_ERR(char_class); printk(KERN_ALERT "my_chardev: Failed to create class\n"); goto fail_class; } // 创建设备节点 if (IS_ERR(device_create(char_class, NULL, dev, NULL, DEVICE_NAME))) { retval = PTR_ERR(device_create(char_class, NULL, dev, NULL, DEVICE_NAME)); printk(KERN_ALERT "my_chardev: Failed to create device\n"); goto fail_device; } printk(KERN_INFO "my_chardev: Module loaded with major number %d\n", major_number); return 0; fail_device: class_destroy(char_class); fail_class: cdev_del(&my_cdev); fail_cdev: unregister_chrdev_region(dev, 1); return retval; } static void __exit chardev_exit(void) { dev_t dev = MKDEV(major_number, 0); device_destroy(char_class, dev); class_destroy(char_class); cdev_del(&my_cdev); unregister_chrdev_region(dev, 1); printk(KERN_INFO "my_chardev: Module unloaded\n"); }

2.4 编译支持：添加Makefile

第四轮提示词："请为这个内核模块编写一个完整的Makefile，支持编译、清理和安装功能。"

模型生成的Makefile：

obj-m += my_chardev.o PWD := $(shell pwd) KERNEL_DIR ?= /lib/modules/$(shell uname -r)/build all: $(MAKE) -C $(KERNEL_DIR) M=$(PWD) modules clean: $(MAKE) -C $(KERNEL_DIR) M=$(PWD) clean install: sudo insmod my_chardev.ko uninstall: sudo rmmod my_chardev reload: uninstall install .PHONY: all clean install uninstall reload