Hi Jim,
Thanks for taking a stab at this. I've looked at the APARs you
suggested, but if the offer clues to my question, I'm not seeing them...
As far as I know, TCBFX and TCBNOIRB both serve the same function:
When either is on, the queuing of IRBs to the task is deferred. Both
of the APARs you suggested, discuss problems when such deferrals are
not managed properly.
What I want to know is, why the redundancy? Why are there two flags
that serve the same purpose? There must be subtle differences... What are they?
What am I missing?
Thanks,
Dave Cole REPLY TO: dbc...@colesoft.com
ColeSoft Marketing WEB PAGE: http://www.colesoft.com
736 Fox Hollow Road VOICE: 540-456-8536
Afton, VA 22920 FAX: 540-456-6658
At 9/30/2011 02:04 PM, Jim Thomas wrote:
Sir,
For TCBNOIRB, I'd suggest scanning thru an old APAR (OA19796) and
perhaps following on to some of the other related APAR's (please
keep in mind, 'IRB').
For TCBFX, I'd suggest, OA16342 and related (please keep in mind,
'asynchronous').
From the little I've used these flags, it's more a question of whom
the 'setter/reset r' is and obviously, what is being done.
Kind Regards
Jim Thomas
617-233-4130 (mobile)
636-294-1014 (res)
j...@thethomasresidence.us (Email)
-----Original Message-----
From: IBM Mainframe Discussion List [mailto:IBM-MAIN@bama.ua.edu] On Behalf
Of David Cole
Sent: Friday, September 30, 2011 5:01 AM
To: IBM-MAIN@bama.ua.edu
Subject: TCBFX vs. TCBNOIRB
Can anyone tell me the difference in purpose or management between
the TCBFX flag and the TCBNOIRB flag?
As far as I know they both are supposed to prevent the queuing of
IRBs. In the IKJTCB macro they each are doc'd as follows:
TCBNOIRB EQU X'40' - If on, IRBs will not be queued to this TCB.
* A program setting this flag MUST save its
* current value and restore that value either
* when that program can tolerate IRBs being
* queued or before the current RB terminates.
TCBFX EQU X'01' - PROHIBIT QUEUEING OF ASYNCHRONOUS EXITS FOR
* THIS TASK
So why do they both exist?
Thanks,
Dave Cole REPLY TO: dbc...@colesoft.com
ColeSoft Marketing WEB PAGE: http://www.colesoft.com
736 Fox Hollow Road VOICE: 540-456-8536
Afton, VA 22920 FAX: 540-456-6658
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