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: <1520@uw-beaver> Date: Mon, 27-Aug-84 02:01:56 EDT Article-I.D.: uw-beaver>.1520 Posted: Mon Aug 27 02:01:56 1984 Date-Received: Wed, 22-Aug-84 00:36:52 EDT Sender: daemon@uw-beave Organization: U of Washington Computer Science Lines: 9 From: Michael RubinDoes anyone know why the Memory Manager shouldn't be called by vertical-retrace tasks? Probably because the Memory Manager isn't reentrant; if it happened to be in the middle of an operation when a vertical-retrace interrupt happened, and the retrace task called it too, its data structures would get trashed. It just wasn't designed for multitasking. -------