programming:linux:start

Table of Contents

Linux Kernel Programming
- General
- Documentation
- RT Linux
- Drivers
  - Code/Examples
- Debug
  - Hints
- Memory
- Scheduling

Linux Kernel Programming

General

The Linux Kernel documentation (raw)
The DeviceTree Specification
Adam Zerella: How to become a Linux kernel developer

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 (kernel documentation)

Code/Examples

ioctl called from within kernel code

Debug

Embedded Linux Wiki: Debugging by printing
Stack Overflow: Linux-kernel debug printouts?
Linux Kernel Documentaion: 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
```

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?

Scheduling

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

programming/linux/start.txt · Last modified: 2020/06/28 21:54 by Ralf Hoppe