Operating Systems 2015F Lecture 7

Video

The video from the lecture given on September 30, 2015 is now available.

Notes

The project

• Modify the linux kernel
• Document what you did and explain why you did it
• Evaluate what you did

You will submit:

• code
• a report

Suggested scope: make a "feedback loop"

• measure something
• change something

Don't limit yoursef to doing things that are "useful"

Entertaining is also good Educational is also good

Feedback loops give systems personality Go with it

Constraint: the system should still be "usable" (But it may be annoying to use)

Hard part

• debugging can get weird

Groups are allowed

• but contribution of every group member should be clear, significant, and documented

Treat the "oral" portion (interview) as a proposal

Project should be "appropriate" for kernel implementation.

Project may include a userspace portion however.

kernel source code

During the lecture we looked a lot at the The Linux kernel cross reference, http://lxr.free-electrons.com/ . Here are some of the pages that we looked at:

• getpid system call implementation
• struct task_struct
• do_sync_read()
• struct file_operations