On Mon, 4 Jan 2010 09:39:35 -0800, Jim Phoenix wrote: >McKown, John wrote: >>> The storage between 2g and 4g is NOT accessible in 31 bit mode. >>> >>> Binyamin Dissen <bdis...@dissensoftware.com> >>> >> >> You're right! So, why bother and how does it improve performance? >>I guess we'll never know. It is likely "proprietary". >> >It improves performance by avoiding the extra level of indirection when >translating the virtual address to a real address on a TLB miss. >Doesn't have to reference the region-table entry.
What? Addresses above 2 GiB need the region third index to translate them. -- Tom Marchant ---------------------------------------------------------------------- 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
