> -----Original Message----- > From: IBM Mainframe Discussion List > [mailto:[EMAIL PROTECTED] On Behalf Of Tom Marchant > Sent: Wednesday, November 21, 2007 11:18 AM > To: IBM-MAIN@BAMA.UA.EDU > Subject: Re: What is 'MVS-recognized' disablement? > > > On Wed, 21 Nov 2007 10:51:09 EST, IBM Mainframe Discussion List wrote: > > >Of course the nucleus is designed not to page-fault while > disabled. One way > >that is guaranteed is by being sure that every byte ever > touched by disabled > >code is fixed before doing the disabling operation. > > If I'm not mistaken, the nucleus is fixed and non-swappable. > Some of it is > even designed to run with DAT off. > > -- > Tom Marchant
I wonder why? Is there something in fixed memory which would otherwise be unavailable because the frames are not in any page mapping? If not, they why not just have such frames be globally mapped V=R in all address spaces? Most curious. -- John McKown Senior Systems Programmer HealthMarkets Keeping the Promise of Affordable Coverage Administrative Services Group Information Technology The information contained in this e-mail message may be privileged and/or confidential. It is for intended addressee(s) only. If you are not the intended recipient, you are hereby notified that any disclosure, reproduction, distribution or other use of this communication is strictly prohibited and could, in certain circumstances, be a criminal offense. If you have received this e-mail in error, please notify the sender by reply and delete this message without copying or disclosing it. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
