[TUHS] Were cron and at done at the same time? Or one before the other?

[Jon Steinhart]

Theodore Y. Ts'o writes:
> > And, if you can actually make a better file system, please go for it, you're
> > a better person than me.  I've looked that that code, and it's huge, has no
> > clearly defined entry and exit points, and is undocumented.  While I've been
> > too busy to deal with stuff, I found some minor bugs and a possible big
> > performance improvement just from trying to read the code.
>
> Did you report those bugs and potential performance improements?
> Feedback is always gratefully accepted.
>
> As far as documentation is concerned, it's not perfect, but it's
> certainly not completely undocumented:
>
> https://www.kernel.org/doc/html/latest/filesystems/index.html
> https://www.kernel.org/doc/html/latest/filesystems/ext4/index.html
>
> Again, I suspect that you're remember the past with rose-colored
> classes.  BSD FFS's fsck (or for that matter, fsck's from any of the
> commercial Unix systems that I was able to see soures for) didn't have
> regression test suites.  Ext2/3/4 was one of the first file system
> fsck's that I'm aware with that was created with a regression test
> suite from the very beginning.  And all of the major file systems in
> Linux are developed using a very large library of functional and
> stress tests:

No, not yet, because I haven't had the time to test.

And sorry, I wasn't clear.  I wasn't talking about the code for a
particular filesystem, I was talking about the generic filesystem
code.

Jon