[TUHS] [tuhs] The Unix shell: a 50-year view

[Larry McVoy]

On Tue, Jul 06, 2021 at 09:57:38PM -0400, Dan Cross wrote:
> Fork is another great example: it went in because a) Ken knew about it, and
> b) it was easy to implement (22 instructions of PDP-7 assembler or
> something) and c) it got the job done. After the fact, it turned out to
> have all kinds of neat properties that let it compose with pipelines,
> redirection, background jobs, etc. That model for process management served
> well for a long time. But then people wanted to have multithreaded
> processes, because it turns out that independent threads of execution
> inside of a shared address space are an excellent mechanism for
> representing concurrency. 

http://lkml.iu.edu/hypermail/linux/kernel/0106.2/0405.html

I wasn't completely right 20 years ago but I was close.  I'm tired,
if you want to know where I'm wrong, ask and I'll tell you how I
tried to get Linus to fix it.

In general, Rob was on point.  He usually is.