Re:RISC-V OS using Rust: Filesystems
by loeg on Tuesday May 12, 2020 @02:32PM
(#23157778)
The minix fs seems to be basically the classic Unix FS design, like UFS/FFS or Ext2, prior to the concept of cylinder groups (at least, per this description and Wikipedia's) and without some of the more advanced features of those filesystems (softupdates, directory trees, etc).
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Re:RISC-V OS using Rust: Filesystems
by yjftsjthsd-h on Tuesday May 12, 2020 @03:27PM
(#23158552)
I mean, that's what you'd expect from an OS that was originally for teaching, right? A worked example of the fundamental parts common to most other unix filesystems, just as I would naively expect the minix scheduler to just be round-robin or something, etc.
Well, that was especially true for Minix 1 and 2. Minix 3 is purportedly a production operating system, and ships in every Intel CPU for the last decade or so, right? So while admittedly it may not have significant filesystem needs, it is not purely a teaching operating system anymore.
Nowadays I might point at MIT's xv6, which implements a very similar simple unix filesystem: https://github.com/mit-pdos/xv6-public/blob/master/fs.c
Re:RISC-V OS using Rust: Filesystems
by pavehawk2007 on Tuesday May 12, 2020 @06:44PM
(#23161004)
xv6 also was switched to RISC-V (not exactly sure when, but sometime in 2019), and it has a nice book for the actual course.
Course: https://pdos.csail.mit.edu/6.828/2019/xv6.html Book: https://pdos.csail.mit.edu/6.828/2019/xv6/book-riscv-rev0.pd...
Take a look at chapter 7 for the xv6 filesystem referenced here.