printk不适用于内核调试 [英] printk not working for kernel debgugging

问题描述

我在内核代码中放入了一些调试消息. 已经检查了/var/log/messages，dmesg，并且那里没有这样的转储. syslogd正在计算机上运行

I put some debugging messages in the kernel code. have checked /var/log/messages, dmesg and there is no such dump there. syslogd is running on the machine

我也将/proc/sys/kernel/printk更改为 8 4 1 7

i also changed /proc/sys/kernel/printk to 8 4 1 7

知道什么可能是问题吗?

any idea what can be the problem?

推荐答案

最简单的解释是您的printk()没有被调用.

The easiest explanation is your printk() is not being called.

在调试此问题时，请保持简单并坚持检查dmesg(1)输出-所有syslog(3) /var/log/messages和基于控制台的输出均与消息中未显示的问题分开，内核的消息缓冲区.

Keep it simple and stick to checking dmesg(1) output while you're debugging this problem -- all the syslog(3) /var/log/messages and the console based output are separate from the issue of the messages not even showing up in the kernel's message buffer.

这篇关于printk不适用于内核调试的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！