KernelHacking-HOWTO/Overview of the Kernel Source Code/Internals of Interrupt Handling

This section will discuss, the hardware prospective of interrupt handling fromCPU, Linux Kernel's Interrupt Routing subsystem, Device Drivers's rolein Interrupt handling.
Term Interrupt is self defined,Interrupts are signals sent to CPU on an INTR bus (connected to CPU) whenever any device want to get attention of CPU. As soon as theinterrupt signal occurs, CPU defer the current activity and service the interrupt by executing the interrupt handler corresponding to that interrupt number (also know as IRQ number).
One of the clasifications of Interrupts can be done as follows: - Synchronous Interrupts (also know on as software interrupts) - Asynchronous Interrupts (also know as hardware interrupts)