I/O System

Kernel I/O Subsystem

• Definition : kernel is the fundamental part of an operating system.
• It is a piece of software responsible for providing secure access to the machine's hardware to various computer programs.
• Accessing the hardware directly could also be very complex, so kernels usually implement a set of hardware abstractions.
• Kernel Function
• Memory management.

contoh memori management : Address space allocation, Memory protection.

• Process management.
  

contoh proces management : Process creation, deletion, Scheduling.

• Resource management.
  

contoh resource manegement : Device drivers/handlers.

• Service yang disediakan oleh kernel I/O subsystem adalah I/O scheduling, buffering, caching, spooling and reservasi device, error handling.