VM66780: Z/VM VERSION 7.4 INITIAL SERVICE RSU

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• This APAR contains required service for the installation of z/VM
  version 7 release 4.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of z/VM 7.4                        *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  ****************************************************************
  * RECOMMENDATION: APPLY PTF                                    *
  ****************************************************************
  This is the initial RSU fix pack for z/VM 7.4.  As such it
  contains fixes for the following problems:
  
  ABEND PRG004 in ISFC Timeout Processing
  (z/VM 7.3 APAR VM66778)
  
  Abend in HCPKCDTO due to faulty serialization between the link
  I/O layer of ISFC and the handling of the internal message
  completion queue.
  
  -----
  
  MAC Table Synchronization Errors Following VMRELOCATE
  (z/VM 7.3 APAR VM66764)
  
  A previously relocated user after being logged off and logged
  back on reported HCPNIC2797E (MACID already in use) noting the
  MACID is still in use for the same userid.
  
  -----
  
  ABEND PRG004 in HCPSWL for Multi-VSWITCH LAG Configurations
  (z/VM 7.3 APAR VM66777)
  
  When a device in a z/VM Multi-VSWITCH LAG Configuration receives
  an asynchronous state change notification from the OSA adapter
  just prior to being deactivated from the port group, a PRG004
  abend can occur.  The handling of the state change notification
  within z/VM improperly attempted referencing control blocks
  which were deleted when the port was no longer active.
  
  -----
  
  XFS File System Errors After HPF I/O to Virtual HyperPAV Alias
  (z/VM 7.3 APAR VM66776)
  
  Linux guest XFS file system reports errors when using HPF I/O
  requests to 1-END minidisks with guest exploited virtual
  HyperPAV Alias devices.  Internal control block structures for
  the virtual HyperPAV alias devices were not updated prior to
  certain functions of I/O translation.  This could in some
  instances lead to incorrect cylinder specifications on the real
  I/O requests.
  

Problem conclusion

• The following actions were taken to resolve the reported
  problems:
  
  ABEND PRG004 in ISFC Timeout Processing
  (z/VM 7.3 APAR VM66778)
  
  ISFC Serialization was expanded to account for the potential
  interaction between the Link I/O layer and message queue
  handling which led to the abend.
  
  -----
  
  MAC Table Synchronization Errors Following VMRELOCATE
  (z/VM 7.3 APAR VM66764)
  
  SSI communication used to indicate changes in MAC address usage
  was updated to ensure the guest LOGOFF case builds a valid
  request which will update the MAC tables on all members of the
  SSI.
  
  -----
  
  ABEND PRG004 in HCPSWL for Multi-VSWITCH LAG Configurations
  (z/VM 7.3 APAR VM66777)
  
  The processing of the state change notification received from
  the OSA adapter was updated to verify the network connection for
  the port is still operational before attempting recovery.  If
  the port is no longer operational, there is no need to process
  the state change and it will be discarded.
  
  -----
  
  XFS File System Errors After HPF I/O to Virtual HyperPAV Alias
  (z/VM 7.3 APAR VM66776)
  
  HPF I/O translation was updated to ensure internal control block
  structures for virtual HyperPAV aliases are updated prior to
  I/O translation.  This ensures the I/O requests are now always
  translated correctly for the current alias usage.
  

Temporary fix

• FOR RELEASE VM/ESA CP/ESA R740 :
  PREREQ: NONE
  CO-REQ: NONE
  IF-REQ: NONE
  

Comments

APAR Information

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

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

  UM90463

Modules/Macros

• HCPFCWDS HCPFXR   HCPFXTBK HCPKCD   HCPSWL   HCPXLG
  

Fix information

• Fixed component name

  VM CP CP

• Fixed component ID

  568411202

Applicable component levels

• R740 PSY UM90463

     UP24/07/22 P 2401 ¢

Fix is available

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