Xref: utzoo comp.unix.xenix:3393 comp.unix.microport:1598 Path: utzoo!utgpu!water!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!mailrus!ames!pasteur!ucbvax!decwrl!sun!pitstop!sundc!seismo!uunet!munnari!otc!metro!extro!glenn From: glenn@extro.ucc.su.oz (G. Geers [ext 3241]) Newsgroups: comp.unix.xenix,comp.unix.microport Subject: OS/2 and demand paging Message-ID: <239@extro.ucc.su.oz> Date: 20 Sep 88 03:02:36 GMT Reply-To: glenn@extro.ucc.su.oz (G. Geers [ext 3241]) Organization: University of Sydney Computing Service, Australia Lines: 29 First I guess I should thank everyone who sent replies either on the net or by mail. It looks as if I stirred up a bit of a hornet's nest ! I am still curious as to why the designers of Microport omitted segment swapping (despite the bugs in the 286) ? I only ask this because I've had another look at some books on OS/2 in the bookshop on campus. They quite clearly state (all of them !) that if a segment is not present in real memory it is swapped in on demand (new term: demand segment swapping ?) They go on to say that the absolute minimum config is 1.5Mb which I imagine is large enough to keep segment swapping down to a minimum. Has anyone seen OS/2 running ? Does it really swap segments ? Or have the manual boys/girls goofed again (no offence guys!) ? Oh, I didn't include the Xenix designers above because they're from Microsoft and they built OS/2 so I can see an economic reason for not including the feature in Xenix 286. OS/2 does not demand page on the 386 so UNIX/XENIX is still the better deal for machines with this processor. It runs in 286 emulation mode I guess. Sorry for being persistent but when your're trying to decide how you spend your money I suppose you have to be. Replies to the net or by mail are fine. Glenn