I'm not sure, but I would guess that the Nucleus use of Large Page does not involve the LFAREA in any way. The nucleus is loaded before the LFAREA is probably even built, and there is no logical need for them to be related. I would guess that any full 1MB segments above the line that the nucleus occupies are simply defined as a large page in the COMMON area segment table elements, rather than creating a page table for it.
On Fri, Aug 26, 2011 at 6:11 PM, David Magee <david.ma...@dillards.com>wrote: > In the redbook publication mentioned in the thread's title (see > http://www.redbooks.ibm.com/redbooks/pdfs/sg247853.pdf), Section 6.4.1 I > see the following: > > "A new function in z/OS V1R12 introduces large page support to back the > nucleus. The nucleus is in 31-bit storage, and so this support uses large > pages in 31-bit storage. Backing the nucleus with large pages results in > improved performance to the z/OS core itself." > > I do not see anything in the publication about how you control z/OS's use > of the LFAREA if one is defined. Can anyone point me to the correct > documentation? Or does z/OS just gobble up as much of the LFAREA as it > wants to for its nucleus as the default? > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO > Search the archives at http://bama.ua.edu/archives/ibm-main.html > CONFIDENTIALITY/EMAIL NOTICE: The material in this transmission contains confidential and privileged information intended only for the addressee. If you are not the intended recipient, please be advised that you have received this material in error and that any forwarding, copying, printing, distribution, use or disclosure of the material is strictly prohibited. If you have received this material in error, please (i) do not read it, (ii) reply to the sender that you received the message in error, and (iii) erase or destroy the material. Emails are not secure and can be intercepted, amended, lost or destroyed, or contain viruses. You are deemed to have accepted these risks if you communicate with us by email. Thank you. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
