On Sat, 19 May 2007 20:59:40 -0500, Paul Gilmartin <[EMAIL PROTECTED]> wrote:
>On Sat, 19 May 2007 20:52:05 -0300, Clark Morris wrote: >> >> ... If the ENQ is exclusive for the first step and >>shared for the second, it will be changed by the initiator/terminator >>between steps. >> >Nope. > >Wishful thinking. > >But why not? ENQ RET=CHNG only supports 'upgrade' from SHR to EXC, not 'downgrade' from EXC to SHR. DEQing and re-ENQing may put you behind some waiting request, which would expose you to deadly embraces. Scott Fagen z/OS Core Technology Design IBM Poughkeepsie ---------------------------------------------------------------------- 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
