Question

I have some questions concerning the /sys/module/ in linux

1. Does the /sys/module contain all modules of kernel

2. Does the /sys/module/xxx/parameters contains all parameters of the kernel module xxxx

3. Does the /sys/module/xxx/parameters/yyyy contain realtime values of the parameter yyyy of the kernel module xxxx

4. if a parameter is changed in a giving kernel module, how to detect this change in RealTime? I want to develop a C application (user space) or a shell script which detect the change of a giving kernel module parameter in real time.

Answer 1

Parameters are input values and not state values. You can not change a parameter after the recipient of the parameter has started.

If you want to change the behavior of the kernel at run time you have to use /proc/sys. See here: http://tournasdimitrios1.wordpress.com/2011/02/07/passing-parameters-to-the-kernel-at-run-time-time-on-linux/