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From: schwartz@groucho.cs.psu.edu (Scott E. Schwartz)
Newsgroups: comp.arch,comp.lang.functional,comp.lang.lisp,comp.lang.prolog
Subject: Re: GC triggering and stack limit checking by MMU hardware
Message-ID: <Fhtz5421@cs.psu.edu>
Date: 20 Jul 90 18:32:16 GMT
References: <1990Jul19.151524.22544@diku.dk> <3260@swi.swi.psy.uva.nl>
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In-Reply-To: jan@swi.psy.uva.nl's message of 20 Jul 90 10:07:53 GMT
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In article <3260@swi.swi.psy.uva.nl> 
 jan@swi.psy.uva.nl (Jan Wielemaker) writes:
| Both schemas are not ideal.  The mmap() requires a file and reads the
| file into the page as a page is mapped.  This is a waste of resources; I
| just want a page of uninitialised memory and need no file.

Rather than mapping a file, you can map /dev/zero, which provides zero
filled copy on write pages.