On Friday, 10/07/2005 at 10:39 AST, "Kielek, Samuel" <[EMAIL PROTECTED]> wrote:
> >>z/VM 5.2 changes the way CP views memory and the need for CP to keep > >>dragging pages below 2GB is eliminated. > > So does that mean with 5.2 CP was re-written to be completely 64bit? If > so, that is awesome! If not, is there anything else we need to know and > what are the gotchas if any? No, CP was not re-written to be completely 64-bit. Presentations will be given at conferences to discuss more of the details, but the general picture is that: - More of CP runs in 64-bit addressing mode - More of CP uses AR mode to access high memory - The V=R (identity) mapping used by CP to access memory is gone So, while much of CP remains in 31-bit addressing mode, the way pages are "translated" by CP modules no longer requres that the page physically reside < 2GB, but simply be part of CP's 2GB "system execution space". In other words, "a miracle occurs in Step 2". Alan Altmark z/VM Development IBM Endicott ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
