OA59324: ABEND822 REGION SIZE IEFUSI AFTER UPGRADE LDAVVRG SMFLIM

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• You may experience an ABEND822 on z/OS 2.2, 2.3, or 2.4
  depending on the setting of your IEFUSI's below 16MB region
  limit.
  
  This can occur only with 24-bit region requests, ie REGION= set
  to a value less 16MB, while
  
         - IEFUSI exit specifies a value larger then LDASIZA for
           the REGION LIMIT, word 5 Sub-word 3 of the exit
           parameters.
  
         - IEFUSI exit does not specify a value for Region Size,
           word 5 Sub-word 4 of the exit paramaters
  
  This causes the region size (LDAVVRG) to be set to a value of
  the size of private.  Where previously the size of private or
  the region request size, whichever was smaller would be used.
  
  0MB Region requests are not affected by Abend822 processing.
  
  VERIFICATION STEPS:
  For example:
  Verification Steps:
  1.  In the abend822 dump issue:
      ip verbx vsmdata 'nog summ'
      f map
  
    =======================================<- 16M Line
  
    : Global Storage            :
    :___________________________:  900000  <- Top of Private
    |                           |
    | LSQA/SWA/229/230          |  900000  <- Max User Region
    |                           |             Address
    |___________________________|  8B4000  <- LSQA Bottom
    |                           |
    | (Free Storage)            |
    |___________________________|    6000  <- User Region Top
    |                           |
    | User Region               |
    |___________________________|    6000  <- User Region Start
    : System Storage            :
    :___________________________:       0
  
  Input Specifications:
      Region Requested         =>          300000
      REGIONX values           => SZRQB:        0  SZRQA:        0
      IEFUSI/SMF Specification => SMFL :   900000  SMFEL:  8000000
                                  SMFR : FFFFFFFF  SMFER: FFFFFFFF
      Actual Limit             => LIMIT:   8FA000  ELIM :  8000000
  
  The storage map and input specifications represent a 3MB region
  request (from JCL Region= or Job Class default), the SMFL value
  represents a 9MB Region limit defined by the IEFUSI.  Since the
  start of the region is at x'6000', only 8FA000 bytes are
  available for region processing.  Since the size of private is
  008FA000, the IEFUSI limit of 00900000 is not honored and
  treated as no limit.
  
  Make note of the SMFL value, SMFR value, LIMIT value, and the
  Region Requested value
  
  
  2. Format the LDA (ASCBLDA points to the LDA), use control block
     formatter  ipcs command
     ip cbf LDA_Address str(LDA)
     f VVRG
     F SIZA
  
     VVRG..... 008FA000
     SIZA..... 008FA000
  
  3. If the SMFR (region size) value is FFFFFFFF,
            SMFL (region limit)value is greater then  SIZA
     while  the region requested is reasonably smaller then the
            size of private then this APAR describes your
            problem.
  
    On z.os 2.1 and earlier, you would expect to see
        VVRG..... 00300000  (3MB which is the Region Requested)
  
    On z/OS 2.2 up z/OS 2.4, you would expect to see
        VVRG..... 008FA000  (9192K, which is the entire size of
                             region LDASIZA)
  

Local fix

• BYPASS/CIRCUMVENTION:
  On the failing job step, specify a REGION=17MB or greater
  or
  Remove Limit Size specification in IEFUSI
  or
  Reduce the size of Limit Size in IEFUSI specification
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * Users of HBB77A0 and up.                                     *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * ABEND822 region size IEFUSI after upgrade LDAVVRG SMFLIM     *
  *                                                              *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  This problem can occur only with 24-bit region requests, ie
  REGION= SET to a value less than 16MB, and when the IEFUSI exit
  specifies a large value for Region Limit and does not specify a
  value for Region Size. This causes the region size (LDAVVRG) to
  be set to a value of the size of private.  Where previously the
  size of private or the region request size, whichever was
  smaller would be used.
  

Problem conclusion

• The code to handle 24-bit region requests and set the
  non-extended region size is changed.  When the region request
  from JCL is non-zero and the region size is not set by IEFUSI
  exit, the code is changed to set the region size to the minimum
  of request and limit values.
  

Temporary fix

Comments

• ×**** PE20/12/03 FIX IN ERROR. SEE APAR OA60547  FOR DESCRIPTION
  ×**** PE20/11/25 FIX IN ERROR. SEE APAR OA60547  FOR DESCRIPTION
  

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

  UJ04019 UJ04020 UJ04021

Modules/Macros

• IGVGVRGN
  

Fix information

• Fixed component name

  VSM - VIRT STOR

• Fixed component ID

  5752SC1CH

Applicable component levels

• R7A0 PSY UJ04021

     UP20/10/07 P F010

• R7B0 PSY UJ04019

     UP20/10/07 P F010

• R7C0 PSY UJ04020

     UP20/10/07 P F010

Fix is available

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