From owner-freebsd-bugs  Mon Feb  5 17: 0:20 2001
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Date: Mon, 5 Feb 2001 17:00:02 -0800 (PST)
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From: Garrett Wollman <wollman@khavrinen.lcs.mit.edu>
Subject: i386/24886: Cant msync memory mapped file onto desk.
Reply-To: Garrett Wollman <wollman@khavrinen.lcs.mit.edu>
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The following reply was made to PR i386/24886; it has been noted by GNATS.

From: Garrett Wollman <wollman@khavrinen.lcs.mit.edu>
To: ikqumei@computer.org
Cc: freebsd-gnats-submit@FreeBSD.ORG
Subject: i386/24886: Cant msync memory mapped file onto desk.
Date: Mon, 5 Feb 2001 19:50:44 -0500 (EST)

 <<On Mon, 5 Feb 2001 15:58:41 -0800 (PST), ikqumei@computer.org said:
 
 > 		ofbuf = (char*)mmap(NULL, ofsz, PROT_READ|PROT_WRITE, /*MAP_DENYWRITE*/MAP_PRIVATE, hOldFile, 0);
 
 You have specified a private memory mapping.  Modifications made to
 such mappings are *never* visible anywhere outside that mapping.  Use
 MAP_SHARED to create a mapping which modifies globally-visible state.
 
 -GAWollman
 
 
 


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