Question

I’ve just spent my 2 extra hours trying to find bug in my modification of the kernel of the linux, every time when I was connecting module to the kernel it was good but when I unconnected it my mouse stopped to work, so using printk I found infinite loop, my question is does somebody know nice techniques to detect such bugs, sometimes it is difficult to find such loops, and linux becomes unpredictable, so how can I avoid infinite loops in kernel thanks in advance

Answer 1

There is some infrastructure in the kernel that allows you to detect some lockup conditions :

CONFIG_DETECT_SOFTLOCKUP

CONFIG_DETECT_HUNG_TASK

And the various lock checking function you can find in the “Kernel Hacking” section of the kernel config