[TUHS] !mail tuhs at minnie.tuhs.org

Doug McIlroy doug at cs.dartmouth.edu
Mon Jan 22 22:31:54 AEST 2018

Re: [TUHS] Kernel Sizes

> I've often thought that LSX was V5 'regressed' to the concepts of
> V1, which was facing similar hardware constraints. Is that a
> reasonable view?

> LSX has a maximum of three processes that are swapped
> in and out in a stack-like fashion. Only one process is ever in core.
> Is that how V1 was organized?

The rocess limit was higher in V1. And V1 was a time-sharing
system; for which LIFO swapping is inappropriate. So LSX
seems to have "regressed" to some pre-Unix state.


More information about the TUHS mailing list