linux-kernel-source.md

Linux Kernel Source Code

Getting It

• Git
  • https://github.com/torvalds/linux
  • Clone Command: git clone https://github.com/torvalds/linux.git
• Download
  • curl -LO https://github.com/torvalds/linux/archive/v4.4.zip
  • Unzip it using the command unzip v4.4.zip

Searching It

• Linux Cross Reference (LXR)
  • http://lxr.free-electrons.com/

Key Locations

• task_struct: Generic thread information struct, used on all platforms.
  • include/linux/sched.h
• thread_info: Architecture specific thread information struct. Essentially a subclass of task_struct.
  • arch/x86/include/asm/thread_info.h
• do_fork(...): Primary forking function.
  • kernel/fork.c
• forget_original_parent(...): Reparents a task after its parent task has exited.
  • kernel/exit.c
• context_switch(...): Main context switch function.
  • kernel/sched/core.c