programming:linux:start

Table of Contents

Linux Kernel Programming
- General
- Style & Documentation
- RT Linux
- Drivers
  - Network
  - Code/Examples
- Debug
  - Hints
- Locking
  - Hints
- Memory

Linux Kernel Programming

General

Style & Documentation

RT Linux

Real-Time Linux Wiki
Linux Foundation Wiki: Real-Time LINUX
Linux Foundation Wiki: HOWTO setup Linux with PREEMPT_RT properly
Linux Foundation Wiki: HOWTO build a simple RT application

Drivers

J. Corbet, A. Rubini, G. Kroah-Hartman: Linux Device Drivers (LDD3)
P. J. Salzman, M. Burian, O. Pomerantz: The Linux Kernel Module Programming Guide
Tariq Shureih (Intel): HOWTO: Linux Device Driver Dos and Don'ts
Linux Kernel Documentation: Driver Model
Linux Kernel Documentation: Building External Modules

Network

PHY Abstraction Layer
phylink (SFP)

Code/Examples

ioctl called from within kernel code

Debug

Embedded Linux Wiki: Debugging by printing
Stack Overflow: Linux-kernel debug printouts?
Linux Kernel Documentation: pr_debug()

Hints

Use WARN_ON() and BUG_ON() macros for run-time assertions.
Use this code (in kernel module Makefile) to enable/disable pr_debug based output in kernel message ring buffer
```
ccflags-y += -DDEBUG
```

Locking

Linux Kernel Documentation: Proper Locking Under a Preemptible Kernel
Linux Kernel Documentation: Spin locks
Linux Kernel Documentation: Generic Mutex Subsystem
Linux Kernel Documentation: RT-mutex implementation design

Hints

Suppress scheduling by use of function preempt_disable().
Functions irqs_disabled() and in_interrupt() are very helpful regarding protection of non-preemptive code (see also the comments at Stack Overflow).
For use of [num]delay(), usleep() and friends see timers-howto.txt.

Memory

Mel Gorman: Understanding the Linux Virtual Memory Manager
Ulrich Drepper: What every programmer should know about memory
Server Fault: How is kernel oom score calculated?

programming/linux/start.txt · Last modified: 2021/09/24 17:24 by Ralf Hoppe