A new version has been released (2022) -- 2022年出了新的，更多内容的PDF文档

[gywghhb]

The link to the PDF is here 链接在此： https://pdos.csail.mit.edu/6.828/2022/xv6/book-riscv-rev3.pdf

I'm also learning OS dev with this newest version, might contribute to the translation effort when I feel competent enough. It seems like there has been quite some changes since the 2014 version, such as the new Concurrency chapter, and that some content has been taken out into its own chapter. 我现在也在学，等一段时间后可能会参加贡献。目测新版的改动比起目前中文版基于的版本还是有很多的，比如添加了concurrency，然后有些内容也单独提出来做为一章。