MIT 6.S081: Operating System Engineering - CS自学指南 #106
giscus[bot]
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Replies: 47 comments 47 replies
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个人整理的一些S081能用到的博客和资料，希望能为这份自学指南做点贡献，另外有关 xv6-riscv 操作系统的学习可以看深圳大学这位老师发在 哔哩哔哩 的视频：正明大佐 参考资料 |
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自荐一波，b站持续更新，xv6源码与lab讲解：https://www.bilibili.com/video/BV1ou41127p9/ |
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2022/7/8日开始做，四处碰壁，快放弃了，昨晚睡觉前在b站找到楼主的视频添加到稍后再看，今天想起这个wiki，进来一看，咦？这不是我昨晚找到的视频吗？跟着视频做，现在已经搭建好了环境，用的是wls2的ubuntu，感谢！ |
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一起来学习么, 微信tuyu550574002 |
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推荐一下OSTEP，是一个在线的电子教材，写的也很清楚，很好入门~ |
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OSTEP就是NJU OS 2021,2022的课程教材。应该说OSTEP是top级别的操作系统教科书了 |
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推荐一份翻译笔记： |
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进不去了 |
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推荐一份非常棒的中文资料 http://xv6.dgs.zone/ |
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有人知道如何注册piazza吗？ |
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欢迎交流wechat id: 18481265082 |
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自荐魔改xv6仓库https://github.com/linepi/xv6，实现了很多功能（环境变量，动态栈，backtrace打印文件行）。欢迎交流～ |
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想问下，学这个需要先学riscv汇编吗？我只通过csapp学过x86汇编 |
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riscv非常简单，学过x86再学就是换了个皮 |
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网站打不开了吗 |
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课程网站打不开了QAQ |
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推荐一份S081资源共享文档https://tarplkpqsm.feishu.cn/docs/doccnBFsXFMsAr1oXEVsaT9E3Jg# |
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昨天正式开始看，今天 Lab 写了一天。刚开始 Easy(Morris 大佬给出的预计时间是小于 1 小时) 的题目都写了大半天... 好在最后调出来了。确实自己写会理解深入不少，也会发现很多问题。 |
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请问这门课的video值得听吗，草率浏览了一下全是板书，我的想法是只看翻译笔记(https://mit-public-courses-cn-translatio.gitbook.io/mit6-s081/) |
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如果你需要做实验，我感觉尽量还是跟着视频好一些 |
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我是感觉自己不适合看视频, 直接看的翻译笔记(野生note), 感觉没啥问题. |
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打不开了，请问还有什么办法获取 |
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这个和cs162推荐哪个呢 |
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有很多时间的话就cs162(一个人独立完成难度太高太高), 时间紧就mit6.s081 |
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LEC2 youtube 视频上没有，有没有同学补一下！？ |
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页面里超链接的教程已经更新到rev3了: https://pdos.csail.mit.edu/6.828/2023/xv6/book-riscv-rev3.pdf |
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https://pdos.csail.mit.edu/6.828/2024/xv6/book-riscv-rev4.pdf |
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riscv汇编怎么系统学习呢？有教程吗？ |
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我记得ddca有教的，找riscv版本的就行，而且如果只是做6s081的话你一边做一边看这他给的riscv官方文档学也可以的，我就是这样，不懂的再问gpt，主要riscv太简洁了，也很好学，文档才一二百页 |
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太狠了老哥，从软件直接干到硬件设计。。。 |
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哦对，你不要误会我的意思了。。。我的建议还是如果你只是想学6s081的话，一边看文档查GPT一边做完全可以的，riscv无非就是一套指令集，常用的指令也就那些，并且很精简，毕竟硬件电路那些东西学起来也有成本，完全陷进去就有点舍本逐末的意思了，但你如果对硬件电路体系架构之类感兴趣并且有时间的话可以去学学，除了ddca外还有一本计算机组成与设计riscv版也可以，微信读书上有 |
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可以看看berkeley的cs61c课程，做完与riscv相关的两个lab和一个project，你就会对riscv非常了解了 |
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请教一下，从github下载的仓库里，没有带自动评测工具吗？ |
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有的 |
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2021版本的实验少了lazy allocation，大家觉得做了COW还有必要做lazy吗 |
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老哥现在有无看法 |
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补充资料: 6s081 all-in-one https://xv6.dgs.zone/ |
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有没有正在学的同学在debug xv6的时候遇到stepi 进不了kernel space的情况啊(stepi ecall 直接跳到ret了)， 本人使用WSL Ubuntus 22.04的环境 |
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同，请问解决了吗 |
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用 20.04, qemu用指定的版本 |
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20天轻松拿下， 最难最tricky的实验应该是Lab lock |
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佬，学的那个版本，最近想要自学下 |
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2022版本，因为我的WSL Ubuntus 22.04机器配置2021版本的实验环境有点麻烦 |
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2024 版的syscall lab 实验 新出了一个attack lab 有朋友有思路吗～ |
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老哥你系统调用那里的调试和教授课上的一样吗，为什么我有好多不一致的地方 |
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@Lupinus 我没怎么看课程 直接做实验的 |
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找字符串的时候，逐字符匹配，只要相同部分超过串长一半就认为是找到了。或者你调试的时候，把分配的虚页和物理页地址输出一下，比对一下地址也可以发现每次运行时attack对应的虚页地址都是相同的 |
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哈哈哈是的，后面做出来了，原因是字符串的前一半的那部分归还给伙伴系统的时候用作链表节点了 所以覆盖了 后面一半是能比较出来的 |
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同问，我用window subsystem linux 22.04 调试的时候进不了kernel space
Xinyu Kuo ***@***.***> 于2024年11月22日周五 02:33写道：
… 老哥你系统调用那里的调试和教授课上的一样吗，为什么我有好多不一致的地方
@Lupinus <https://github.com/Lupinus> 我没怎么看课程 直接做实验的
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用20.04 |
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2024.12.8 我完成了 xv6 labs 2023 版。自荐一下我的 Lab1-10 的个人笔记（从配环境启动、教材笔记摘录到到完成最后一个实验），以及个人代码仓库（内含学习和完成实验用到的所有文档资料），原创代码实现，码风良好，有英文注释，希望能对后人有所帮助~😘 |
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2024的Lab3 page table中print pgtbl给出的答案是错的 |
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如果你说的是这个地方给的示例的话， |
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是的，我还复现了为什么没有打印出正确的值，他在对参数做移位的时候发生了溢出 |
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拜见了一下你的代码，示例是不是这个原因我不清楚，你的那个其实不完全是因为i位移溢出，即使没有溢出，左移以后最高位是1了的话，int向uint64扩展的过程里先符号拓展到long，拓展出去的位数就全是0xffff...了（最后i声明为uint64的修改是对的，如果声明成uint32就有溢出的问题，最后会变成全是0x00000000c0000000这样的数字） |
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是的，非常严谨👍 |
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2024年的locks第一个问题，memory allocator，我发现我的 test3 经常会失败，大家有遇到这种情况吗？ |
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现在这门课改名叫6.1810了：https://pdos.csail.mit.edu/6.828/2024/index.html |
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给后来的提个醒，直接做lab可能不好下手，有的实验必须读内核源码才能理解机制，建议是跟课程官网的阅读材料先过一遍内容和源码 |
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微信 astro_zhipzhang， 看看有没有小伙伴一起 |
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哥们，进度到哪了？完成了吗？ |
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我还没到一半，可以讨论一下吗 |
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兄弟，我也没做多少。我来问人就是因为我被lab3的环境给折磨好久，换环境和重装都没用。 |
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有的 |
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能否交流一下 我lab3把superpage denote 成普通page 会panic qq：3121506708 |
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MIT 6.S081: Operating System Engineering - CS自学指南
CS自学指南
https://csdiy.wiki/%E6%93%8D%E4%BD%9C%E7%B3%BB%E7%BB%9F/MIT6.S081/
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