Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!csd4.milw.wisc.edu!bionet!agate!ucbvax!tut.cis.ohio-state.edu!att!cbnewsl!hiho
From: hiho@cbnewsl.ATT.COM (paul.ho)
Newsgroups: comp.unix.questions
Subject: Re: Virt Mem on V.4
Summary: how about regions
Message-ID: <987@cbnewsl.ATT.COM>
Date: 3 Jul 89 21:08:11 GMT
References: <1515@ncr-sd.SanDiego.NCR.COM> <1870@auspex.auspex.com>
Distribution: usa
Organization: AT&T Bell Laboratories
Lines: 11

> With any luck, all you'll have to do is write a "hat (Hardware Address
> Translation) layer" for your MMU, which'll just plug into the rest of
> the VM subsystem.  (If the new hardware uses a 68020+PMMU, or a 68030 or
> so - i.e., if it's using a Motorola-style MMU - you might just see if
> Sun'll sell you their 4.0 implementation; I have no idea if they will,
> but it's worth a try....)  If you *do* have to do more, let AT&T (and
> possibly Sun) know, so that with any luck the implementation can be
> modified to let the new "hat layer" plug into it in the future.

Is region (introduced in SVR3.0) dead? Or does it co-exist with
the VM stuff in SVR4? Thanks.