On Fri, 10 Sep 2010 21:06:24 -0500, John McKown wrote:

>On Fri, 10 Sep 2010 17:00:24 -0700, David Alcock wrote:
>
>>I was under the mistaken belief the use count didn't matter for modules
>linked RENT and/or found in the LPA from a LOAD macro.  But I see that you
>will get a S906 after 32767 (x'7fff') loads.  This is z/OS 1.11.  Did it
>always work this way?
>>
>>CSV002I REQUESTS FOR MODULE IEFBR14  EXCEED MAXIMUM USE COUNT
>>CSV028I ABEND906-08
>
>It must have. If not, then how would contents management know when it could
>FREEMAIN the storage occupied by the RENT module? It only loads into memory
>once with RENT, but when the count goes to zero, I think it still FREEMAIN's
>the module's storage as well as removing the LLE(?) for the module.
>
I hope that if it's in LPA it never gets FREEMAINed, possibly because
the count never becomes zero.

If it's NORENT, I hope a copy gets fetched for each LOAD, and the
count for each copy should be one.

If there's a common count for an LPA module, could someone perpetrate
a DoS attack by issuing max-1 loads and waiting for someone else to
fall into the trap?

-- gil

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