Crate keos_project3 

Project 3: Advanced Memory Management

In Project 3, you will expand KeOS’s memory subsystem by implementing more sophisticated techniques to manage memory efficiently. The focus will be on two key features:

• Lazy Paging: A strategy that delays allocation until a page is actually accessed, reducing memory usage and improving performance.

• Fork with Copy-On-Write: An optimized process duplication mechanism where memory pages are initially shared between the parent and child processes, and only duplicated when a write occurs.

Together, these mechanisms are essential for building a modern, efficient operating system that handles memory-intensive workloads effectively.

Getting Started

To get started, navigate to the keos-project3/grader directory and run:

$ cargo run

Modifiable Files

In this project, you can modify the following two files:

• lazy_pager.rs
• fork.rs

Project Outline

• Lazy Paging: Implement demand paging, deferring memory allocation and actual page loading until the first access triggers a page fault.

• Fork: Implement the fork system call using Copy-on-Write (COW), allowing processes to share memory pages efficiently until one attempts to modify them.

Re-exports

pub use process::Process;

Modules

fork

Fork with Copy-On-Write optimization.

lazy_pager

Lazy Paging

process

The process model for project3.

Enums

SyscallNumber

Represents system call numbers used in project3.