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OA46474: NEW FUNCTION APAR - ZHPF CACHE MISS INDICATOR

A fix is available

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APAR status

  • Closed as new function.

Error description

  • NEW FUNCTION APAR
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED: Users at HBB7790 and above                   *
    ****************************************************************
    * PROBLEM DESCRIPTION: New function APAR to provide an         *
    *                      indicator in the IOBE of whether a      *
    *                      cache miss occurred for a zHPF I/O      *
    *                      request (ZHPF/K)                        *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    New function APAR to provide an indicator in the IOBE (IOSDIOBE)
    of whether a cache miss occurred for a zHPF I/O request.
    

Problem conclusion

Temporary fix

Comments

  • New function APAR to provide an indicator in the IOBE (IOSDIOBE)
    of whether a cache miss occurred for a zHPF I/O request.
    
    The following documentation updates will be made:
    
    . z/OS V2R1 MVS Data Areas Volume 3 (IEFALCXT -IRARENF1)
      (GA32-0937-02)
    . z/OS V2R2 MVS Data Areas Volume 2 (IAX -ISG)  (GA32-0936-03)
    
      Update to the IOSDIOBE section
    
      IOBE Structure Mapping
      ----------------------
    
      OFFSET
       HEX  TYPE      LENGTH NAME (DIM)     DESCRIPTION
      ===== ================ ============== =======================
      ...
      (13)  BITSTRING   1    IOBEFLG4       Flag byte 4
            1... ....         IOBEZHPF      "X80" zHPF channel
                                             program - used for
                                             EXCPVR and EXCP
                                             virtual requests
    |       .1.. ....         IOBECacheMiss "X40" One or more I/O
    |                                        device cache misses
    |                                        occurred during this
    |                                        I/O operation.  This
    |                                        bit is valid only for
    |                                        zHPF I/O requests.  It
    |                                        must be set to zero by
    |                                        the driver.
      ...
    
    . z/OS DFSMSdfp Advanced Services (SC23-6861)
    
      Chapter 4 - Executing Your Own Channel Programs
    
      Topic - Input/Output Block Common Extension (IOBE) Fields
    
      Table - IOBE Structure Mapping
    
               Length or
      Offset   Bit Pattern   Name           Description
      ------------------------------------------------------------
      ...
      19       1             IOBEFLG4       Flag byte 4
      (X'13')  1... ....     IOBEZHPF       zHPF channel program -
    |                                       used for EXCPVR and
    |                                       EXCP virtual requests
    |          .1.. ....     IOBECacheMiss  One or more I/O device
    |                                       cache misses occurred
    |                                       during this I/O
    |                                       operation.  This bit is
    |                                       valid only for zHPF I/O
    |                                       requests.  It must be
    |                                       set to zero by the
    |                                       driver.
      ...
     KEYWORDS: ZHPF/K
    

APAR Information

  • APAR number

    OA46474

  • Reported component name

    IOS

  • Reported component ID

    5752SC1C3

  • Reported release

    790

  • Status

    CLOSED UR1

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    YesSpecatt / New Function / Xsystem

  • Submitted date

    2014-11-06

  • Closed date

    2015-10-30

  • Last modified date

    2016-11-22

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

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

    UA79595 UA79596

Modules/Macros

  • IOSDIOBE IOSVIRBA IOSVSSCQ
    

Publications Referenced
GA32093702GA32093603SC23686100  

Fix information

  • Fixed component name

    IOS

  • Fixed component ID

    5752SC1C3

Applicable component levels

  • R7A0 PSY UA79595

       UP15/11/11 P F511

  • R790 PSY UA79596

       UP15/11/11 P F511

Fix is available

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Document Information

Modified date:
22 November 2016