On Fri, Apr 2, 2021, 7:51 PM Dave Horsfall <dave@horsfall.org> wrote:

> On Fri, 2 Apr 2021, Larry McVoy wrote:
>
> > SunOS 4, though I love it more than most people, is ancient history and
> > is basically under one big lock for SMP.  It was a huge amount of work
> > to get that code to scale in Solaris (they lifted the VM system and the
> > hat layer from SunOS 4 to 5 and then went to work).
>
> SunOS 4.1 was the best *ix I have ever used (and I've used lots over the
> decades); then Slowaris came along and trashed the joint because the suits
> were in charge instead of the real workers.
>
> We never had a need for SMP, so we didn't miss it.
>

OS/MP from Solbourne gave you both: SMP and SonOS 4.1.x.

Warner

>
> -- Dave
>