From 01a6c054d548d9fff8bbdfac4d3f3de4ae8677a1 Mon Sep 17 00:00:00 2001 From: Austin Clements Date: Wed, 7 Sep 2011 11:49:14 -0400 Subject: Remove web directory; all cruft or moved to 6.828 repo --- web/index.html | 164 --------------------------------------------------------- 1 file changed, 164 deletions(-) delete mode 100644 web/index.html (limited to 'web/index.html') diff --git a/web/index.html b/web/index.html deleted file mode 100644 index fe6da4a..0000000 --- a/web/index.html +++ /dev/null @@ -1,164 +0,0 @@ - - -Xv6, a simple Unix-like teaching operating system - - - - -

Xv6, a simple Unix-like teaching operating system

- -

Introduction

- -Xv6 is a teaching operating system developed in the summer of 2006 for -MIT's operating systems -course, 6.828: operating -systems Engineering. We hope that xv6 will be useful in other -courses too. This page collects resources to aid the use of xv6 in -other courses, including a commentary on the source code itself. - -

History and Background

- -

For many years, MIT had no operating systems course. In the fall of 2002, -one was created to teach operating systems engineering. In the course lectures, -the class worked through Sixth Edition Unix (aka V6) using -John Lions's famous commentary. In the lab assignments, students wrote most of -an exokernel operating system, eventually named Jos, for the Intel x86. -Exposing students to multiple systems–V6 and Jos–helped develop a -sense of the spectrum of operating system designs. - -

-V6 presented pedagogic challenges from the start. -Students doubted the relevance of an obsolete 30-year-old operating system -written in an obsolete programming language (pre-K&R C) -running on obsolete hardware (the PDP-11). -Students also struggled to learn the low-level details of two different -architectures (the PDP-11 and the Intel x86) at the same time. -By the summer of 2006, we had decided to replace V6 -with a new operating system, xv6, modeled on V6 -but written in ANSI C and running on multiprocessor -Intel x86 machines. -Xv6's use of the x86 makes it more relevant to -students' experience than V6 was -and unifies the course around a single architecture. -Adding multiprocessor support requires handling concurrency head on with -locks and threads (instead of using special-case solutions for -uniprocessors such as -enabling/disabling interrupts) and helps relevance. -Finally, writing a new system allowed us to write cleaner versions -of the rougher parts of V6, like the scheduler and file system. -6.828 substituted xv6 for V6 in the fall of 2006. - -

Xv6 sources and text

- -The latest xv6 source is available via -
git clone git://pdos.csail.mit.edu/xv6/xv6.git
-We also distribute the sources as a printed booklet with line numbers -that keep everyone together during lectures. The booklet is available as xv6-rev6.pdf. To get the version -corresponding to this booklet, run -
git checkout -b xv6-rev6 xv6-rev6
- -

-The xv6 source code is licensed under -the traditional MIT -license; see the LICENSE file in the source distribution. To help students -read through xv6 and learn about the main ideas in operating systems we also -distribute a textbook/commentary for the latest xv6. -The line numbers in this book refer to the above source booklet. - -

-xv6 compiles using the GNU C compiler, -targeted at the x86 using ELF binaries. -On BSD and Linux systems, you can use the native compilers; -On OS X, which doesn't use ELF binaries, -you must use a cross-compiler. -Xv6 does boot on real hardware, but typically -we run it using the QEMU emulator. -Both the GCC cross compiler and QEMU -can be found on the 6.828 tools page. - -

Xv6 lecture material

- -In 6.828, the lectures in the first half of the course cover the xv6 sources and -text. The lectures in the second half consider advanced topics using research -papers; for some, xv6 serves as a useful base for making discussions concrete. -The lecture notes are available from the 6.828 schedule page. - - -

Unix Version 6

- -

6.828's xv6 is inspired by Unix V6 and by: - -

- -The following are useful to read the original code: - - -

Feedback

-If you are interested in using xv6 or have used xv6 in a course, -we would love to hear from you. -If there's anything that we can do to make xv6 easier -to adopt, we'd like to hear about it. -We'd also be interested to hear what worked well and what didn't. -

-Russ Cox (rsc@swtch.com)
-Frans Kaashoek (kaashoek@mit.edu)
-Robert Morris (rtm@mit.edu) -

-You can reach all of us at 6.828-staff@pdos.csail.mit.edu. - -- cgit v1.2.3