Path: utzoo!dciem!daemon
From: lfergus!larry@dciem.dciem.dnd.ca
Newsgroups: comp.os.xinu
Subject: Re:  Chapter 5, Exercise 10
Message-ID: <2750@dciem.dciem.dnd.ca>
Date: 12 Dec 89 23:44:01 GMT
Sender: daemon@dciem.dciem.dnd.ca
Distribution: world
Lines: 20

>
>Hint: think of processes in the ready and current state and remember the
>Scheduling Invariant.  (I Realized When Writing The Book That There Was A
>Problem But Kept It In To Remind Myself Of How Easy It Is To Overlook
>Such Things.  That Way, I'M Not As Hard On Students...)
>
>Cheers,
>Doug
>
  The Scheduling Invariant ... All Processes Are Scheduled In A Round-Robin
With Processes Of The Same Priority (Alternating Ready-Current) And Are
{Removed,Added} {From/To} The Ready-Current List When {Blocked,Unblocked}.
  Processes With A Lower Priority Are Scheduled Only When All Higher Priority
Processes Are Blocked.  Think It Needs A Night'S Sleep - Will Make Sense In
The Morning.
Thanks For The Pointer, Should Be Enough Of A Hint.
Date: Tue, 12 Dec 89 18:40:15 EST
From: lfergus!larry (Larry Moore)
Message-Id: <XX000000ec@lfergus.UUCP>