I found this discussion (https://lwn.net/Articles/657969/) regarding implementation of separate IRQ stack for ARM64.
My understanding is each CPU getting its own IRQ stack. So is it possible to print the stack uses of each IRQ handler? like, How much stack is used & how much left free ? like in process context we have API like stack_not_used(struct task_struct *p) to get the unused stack of processes. So, is it possible to get the similar result for IRQ?
