Steve Samson <[email protected]> writes:
The "bar" is a thick one, from 2g to 4g, "sacrificed" to avoid a somewhat unlikely compatibility exposure. Undisciplined use of the high-order bit in 31-bit addresses could have led to unexpected results. The thick bar avoids such a problem. Considering the vast magnitude of 64-bit virtual addresses, why should anyone care or do anything to circumvent the omitted address range?
The z/OS RSM developers introduced functionality to allow Java to acquire storage within the previously "thick" bar for performance reasons.
-- Edward E Jaffe Phoenix Software International, Inc 831 Parkview Drive North El Segundo, CA 90245 310-338-0400 x318 [email protected] http://www.phoenixsoftware.com/ ---------------------------------------------------------------------- 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
