Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10 UW 5/3/83; site uw-beaver Path: utzoo!watmath!clyde!burl!ulysses!mhuxl!houxm!houxz!vax135!cornell!uw-beaver!info-mac From: info-mac@uw-beaver (info-mac) Newsgroups: fa.info-mac Subject: Re: Vertical Retrace Message-ID: <1518@uw-beaver> Date: Mon, 27-Aug-84 01:11:43 EDT Article-I.D.: uw-beaver>.1518 Posted: Mon Aug 27 01:11:43 1984 Date-Received: Wed, 22-Aug-84 00:36:04 EDT Sender: daemon@uw-beave Organization: U of Washington Computer Science Lines: 8 From: winkler@harvard.ARPA (Dan Winkler) The Memory Manager should not be called during vertical retrace tasks because it could trigger a heap compaction. Imagine what that would mean for an application which had just done the first step of dereferencing a handle and, before following the pointer to the actual data, was interrupted by a vertical retrace job which caused a heap compaction and invalidated the pointer.