kernel stack for linux process

Question

Is the kernel stack for all process shared or there is a seperate kernel stack for each process? If it is seperate for each process where is this stack pointer stored? In task_s

Answer 1

The book "Linux kernel Development" of Robert Love has a good explanation about process kernel stack.

And yes, each process has its own kernel stack and if I´m not wrong its pointer is stored on thread_info structure. But I´m not really sure about it, and the struct task_struct is stored on beginning or the end of process kernel stack, depending of CPU architecture.

Cheers. Carlos Maiolino