VM66877: Z/VM 7.4 CP: FEATURE PACK - FEATURE 03 FIX 00

Obtain the fix for this APAR.

APAR status

• Closed as new function.

Error description

• This is the APAR for z/VM 7.4 CP Feature Pack 03.  As such, it
  contains the following new functions:
  
  EQDIO vNIC Simulation
  --------------------------
  Support is provided for creating simulated EQDIO adapters (via
  DEFINE NIC or NICDEF) and coupling them to a virtual switch
  operating in QDIO ETHERNET mode.  Simulated EQDIO adapters and
  simulated QDIO adapters can coexist on the same virtual switch.
  
  EQDIO Multi-VSWITCH Link Aggregation
  ---------------------------------------------
  Support is provided for using EQDIO adapters in a Multi-VSWICH
  Link Aggregation configuration.
  
  Move CMMA Reset Off Master Processor
  --------------------------------------------
  During memory reset, CMMA (Collaborative Memory Management
  Assist) must be initialized by setting the state of all pages to
  stable. This process runs on the Master Processor and will
  prevent other Master Processor work from running until it
  completes. This behavior has resulted in observable delays of
  tens of seconds and caused multiple Monitor sample intervals to
  be skipped.
  
  CMMA reset has been changed to avoid the reset entirely for a
  guest that is not using CMMA. If a reset is required, it will
  run on a non-Master processor if one is available. The duration
  of the reset will still be a function of the size of guest
  memory, but work that must run on the Master processor will not
  be delayed.
  
  Soft Abend Improvements
  -----------------------------
  The feature will allow clients to prevent soft ABENDs from being
  converted to hard ABENDs and also to limit the number of soft
  ABEND dumps that can be produced.
  
  Fast LOGOFF Control
  -----------------------
  This feature adds configuration statement and command support to
  allow the "fast" LOGOFF action delivered by APAR VM66673 to be
  turned off. This will enable customers to prevent guests from
  logging back on before they have released their memory
  resources.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users who intend to:                     *
  *                   - Exploit Multi-VSWITCH Link aggregation   *
  *                     with OSH devices on ( D/T9175 )          *
  *                   - Exploit EQDIO Virtual NICs               *
  *                   - Avoid delays associated with CMMA resets *
  *                   - Limit potential impacts of soft ABENDs   *
  *                   - Control fast LOGON enablement            *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  ****************************************************************
  * RECOMMENDATION: APPLY PTF                                    *
  ****************************************************************
  With the applicable PTFs applied, z/VM will provide support for
  the following:
  
  EQDIO Multi-VSWITCH Link Aggregation (MVLAG)
  - EQDIO (OSH) devices can now be used for Global (cross-LPAR)
    and IVL (cross-CEC) VSWITCHes
    - IVL support provided for either EQDIO port groups or single
      RDEV Configurations
  - Device configuration limits are the same as for QDIO MVLAG
    - 4 Global VSWITCHes in an LPAR can share a port group
    - IVL cannot use the same devices as Global VSWITCHes
  - No new or changed externals
  - Firmware D61C Bundle 15 required
  
  EQDIO Virtual NICs
  - New EQDIO NIC type available on the NICDEF user directory
    statement and DEFINE NIC command
  - EQDIO virtual NICs connect to a QDIO virtual switch
    - VSWITCH uplink port can be either QDIO or EQDIO
    - VSWITCH must be configured in layer 2 (ETHERNET) mode
    - EQDIO and QDIO virtual NICs can coexist on the same
      virtual switch
  - This support allows z/OS guests to connect to a virtual
    switch which uses an EQDIO uplink port
  - Firmware D61C Bundle 15 required
  
  Move CMMA reset off the Master processor
  - Guest memory is reset as part of a virtual System Reset, which
    occurs when a LOGOFF or reIPL of a guest is performed, as well
    as when commands such as SYSTEM CLEAR and SYSTEM RESET are
    issued. During reset, CMMA (Collaborative Memory Management
    Assist) must be initialized by setting the state of all pages
    to stable. This process runs on the Master Processor and will
    prevent other Master Processor work from running until it
    completes. When performed for guests with large virtual memory
    sizes, this can produce noticeable delays and may cause z/VM
    Monitor sample intervals to be skipped.
  
    CMMA reset has been changed to avoid the reset entirely for a
    guest that is not using CMMA. If a reset is required, it will
    run on a non-Master processor if one is available. The
    duration of the reset will still be a function of the size  f
    guest memory, but work that must run on the Master processor
    will not be delayed.
  
  Improve Soft ABEND Control
  - This enhancement to SET ABEND allows:
    (1) preventing soft ABENDs from becoming hard ABENDs and
    (2) limiting the number of soft ABEND dumps
  
  Fast Logoff Control
  - This enhancement allows memory reset behavior during LOGOFF to
    be controlled. The current LOGOFF behavior, introduced in z/VM
    7.3 by APAR VM66673, is fast in that it allows a virtual
    machine to be logged on again before its memory reset is
    initiated. In situations where this is not desirable, the new
    SET LOGOFF command or configuration statement can be used to
    prevent a re-LOGON until memory reset is complete. The current
    setting can be displayed using the new QUERY LOGOFF command.
  
  Help File Updates
  - Help files associated with (but not delivered with) APAR
    VM66844 (Transactional Execution Disablement and Use
    Discovery) are also included here
  

Problem conclusion

Temporary fix

Comments

• The following publications were updated for this support:
  Connectivity
  CP Commands and Utilities Reference
  CP Messages and Coces
  CP Planning and Administration
  CP Programming Services
  General Information
  Migration Guide
  Performance
  

APAR Information

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

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

Modules/Macros

• ABEND    COUPLE   CPLOAD   CPQUERY  CPSET    DEFINLAN DEFINVSW
  FACILITY HCPABC   HCPABF   HCPABN   HCPALD   HCPARD   HCPCFO
  HCPCPE   HCPDGQ   HCPDTS   HCPEQA   HCPEQL   HCPEQS   HCPEQUAT
  HCPESS   HCPGSV   HCPHDI   HCPHPK   HCPIOT   HCPIQC   HCPIQD
  HCPIQG   HCPIQH   HCPIQM   HCPIQN   HCPIQO   HCPIQP   HCPIQQ
  HCPIQR   HCPIQS   HCPIQT   HCPIQV   HCPIQX   HCPISG   HCPISU
  HCPIVA   HCPIVC   HCPIVF   HCPIVG   HCPIVH   HCPLANBK HCPMDLAT
  HCPMEO   HCPMES   HCPMESB  HCPMFO   HCPMLM   HCPMNO   HCPMOL
  HCPMVN   HCPMXD   HCPMXRBK HCPNDF   HCPNDM   HCPNDMBK HCPNDQ
  HCPNET   HCPNIC   HCPNID   HCPNIDBK HCPOM2   HCPPCH   HCPPCI
  HCPPCJ   HCPQRY   HCPQUY   HCPQYA   HCPRDI   HCPRST   HCPSCFBK
  HCPSET   HCPSLMBK HCPSTP   HCPSVU   HCPSWA   HCPSWB   HCPSWC
  HCPSWD   HCPSWH   HCPSWI   HCPSWIBK HCPSWK   HCPSWL   HCPSWM
  HCPSWO   HCPSWP   HCPSWPBK HCPSWR   HCPSWS   HCPSWU   HCPSWV
  HCPSXA   HCPSYS   HCPSYSCM HCPTTA   HCPTXN   HCPUCQ   HCPVLC
  HCPVLE   HCPVLF   HCPVLG   HCPVLI   HCPVLM   HCPVLQ   HCPVLU
  HCPVNS   HCPVQA   HCPVQB   HCPVQG   HCPVQH   HCPVQP   HCPVQQ
  HCPVQR   HCPVQS   HCPVQT   HCPZSC   HCP1011I HCP1944I HCP865I
  HCP866I  HCP9309E HCQTR740 HCWAI5   LAN      LOGOFF   MRIODBPS
  MRIODVSE MRIODVSW MRSYTEPM NIC      NICDEF   NMASTER  QUERY
  SET      SETLOGOF SYSCONFI SYSCSET  SYSCSYST SYSTEFAC VIRTNIC
  VSWITCH  7VMCPR40
  

Fix information

• Fixed component name

  VM CP CP

• Fixed component ID

  568411202

Applicable component levels

• R740 PSY UM90555

     UP25/10/06 I 1000  

Fix is available

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