[TUHS] dmr streams & networking [was: Re: If not Linux, then what?]

arnold at skeeve.com arnold at skeeve.com
Thu Aug 29 04:49:30 AEST 2019


Doug McIlroy <doug at cs.dartmouth.edu> wrote:

> > Doug McIlroy <doug at cs.dartmouth.edu> wrote:
> > 
> >>
> >>> How long was research running on a PDP-11 and when did they move to a VAX?
> >>
> >> London and Reiser had ported Unix to the VAX, replete with virtual memory, in 1978. By the time v7 was released (1979), Vaxen had become the workhorse machines in Research.
> >> 
> >> Doug
> > 
> > So, what's the story on why the London/Reiser port didn't get adapted
> > back by Research, and they ended up starting from 4.1 BSD?
> > 
> > Thanks,
> > 
> > Arnold
>
> Sorry, what I said about London/Reiser is true, but not the whole
> story. L/R didn't have demand paging; BSD did.

But my question still stands. Why didn't Research keep going from L/R
and add demand paging?  Wouldn't that have been "cleaner" than starting
from BSD?

Thanks,

Arnold


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