Interrupts and Interrupt Handling

You will find a couple of posts which describes an interrupts and an exceptions handling in the linux kernel.

Interrupts and Interrupt Handling. Part 1. - describes an interrupts handling theory.
Start to dive into interrupts in the Linux kernel - this part starts to describe interrupts and exceptions handling related stuff from the early stage.
Early interrupt handlers - third part describes early interrupt handlers.
Interrupt handlers - fourth part describes first non-early interrupt handlers.
Implementation of exception handlers - descripbes implementation of some exception handlers as double fault, divide by zero and etc.
Handling Non-Maskable interrupts - describes handling of non-maskable interrupts and the rest of interrupts handlers from the architecture-specific part.
Dive into external hardware interrupts - this part describes early initialization of code which is related to handling of external hardware interrupts.
Non-early initialization of the IRQs - this part describes non-early initialization of code which is related to handling of external hardware interrupts.
Softirq, Tasklets and Workqueues - this part describes softirqs, tasklets and workqueues concepts.