Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ames!amelia!eagle!news
From: mikef@sarah.lerc.nasa.gov (Mike J. Fuller)
Newsgroups: comp.emacs
Subject: Re: GNU Emacs memory usage on Sun 3/4.
Message-ID: <1990Feb3.180749.15772@eagle.lerc.nasa.gov>
Date: 3 Feb 90 18:07:49 GMT
References: <1990Feb3.161555.13925@athena.mit.edu>
Organization: NASA Lewis Research Center, Cleveland, OH
Lines: 16

In article <1990Feb3.161555.13925@athena.mit.edu> drk@athena.mit.edu (David R Kohr) writes:
>Is each running copy of Emacs sharing the text segment with all the other 
>running copes (which is perfectly feasible, for non-self-modifying
>code), or is something else happening?

Yes, SunOS 4.* has shared text.  The text is also demand-paged from
the executable (unless you make it a pure executable by using the -n
option on ld when you link it).  And about self-modifying code -- the
text segment is read-only (unless you use the -N option on ld to make
it read-write).  I don't know about SunOS < 4.*, BSD or SysV.

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