Real-time preemption

This documentation is intended for Linux kernel developers and contributors interested in the inner workings of PREEMPT_RT. It explains key concepts and the required changes compared to a non-PREEMPT_RT configuration.

• Theory of operation
  • Preface
  • Scheduling
  • Sleeping spin locks
  • Priority inheritance
  • Threaded interrupts
  • Summary
• How realtime kernels differ
  • Preface
  • Locking
  • Execution context
  • Spin until ready
• Considering hardware
  • System memory and cache
  • Hardware buses
  • Virtualization
  • Networking
  • Firmware
• Porting an architecture to support PREEMPT_RT
  • Requirements
  • Optional features
• Real-Time Kernel configuration
  • Introduction
  • Configuration options
  • Kernel Debug Options
  • Summary
  • References