I'm planning to write a kernel module.
I will explain the scenario. I have a program in the userspace which takes a value (lets say a variable 'a') from
the user. There is a module in kernel which uses this value in an infinite loop (lets say prints the value of
'a'). When ever the user enters a new value, the kernel should be informed (Something like an event). I need to do
it with least overhead (so preferably all the fileoperations should be avoided).