Kernel/user stack, what does it mean?

Question

i'm preparing a small presentation about process management in linux kernel, and while searching i found out that it's imperative for every process to have a task_struct or process descriptor and the second thing is a private kernel/user stack. Now my question is what's stack means? is it memory space or what is exactly ? what is the kind of the object stack?

any help will infinitely appreciated.

Answer 1

Stack is a memory space that will have the saved variables, parameters of function and return addresses.