Tom, I believe CC was referring to accessing data in another ASID *without* that ASID participating in a formal cross-memory link.
A PC-ss is a formal cross-memory link between the two ASIDs and the server can easily reference caller storage using AR-Mode and the ALET value of 1. Rob Scott Lead Developer Rocket Software 275 Grove Street * Newton, MA 02466-2272 * USA Tel: +1.617.614.2305 Email: [email protected] Web: www.rocketsoftware.com -----Original Message----- From: IBM Mainframe Assembler List [mailto:[email protected]] On Behalf Of Tom Marchant Sent: 14 February 2011 15:08 To: [email protected] Subject: Re: Is this a commonly used technique ? On Sun, 13 Feb 2011 18:40:57 -0600, Chris Craddock wrote: >given that the service provider has provided a space-switch PC for >the client address space to call, what was the point of the SRB? >There's nothing wrong with it per se, but it just adds more moving >parts which on average is less optimal. I believe you had posted previously that the only legal way to access data in another address space is to schedule an SRB. I have been trying to understand why that is so. Is this different by virtue of running a space-switch PC and referencing the caller's address space? -- Tom Marchant Compuware
