VM66000: PEVM65965 DEADLOCK CAUSES SYSTEM HANGS

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• After applying VM65965 customers can experience hangs during
  IPL of the system or after due to a deadock situation with
  the CUIDTLCK and RDEVLOCKs.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All z/VM users.                              *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
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  * RECOMMENDATION: APPLY PTF                                    *
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  Code added by APAR VM65965 can cause a DEADLOCK scenario causing
  systems hangs during IPL or after IPL if PPRC level changes are
  made.
  

Problem conclusion

• PEVM65965 VM65965 - HCPSDV was modified to prevent the DEADLOCK
  situation preventing system hangs caused by VM65965.
  

Temporary fix

• *********
  * HIPER *
  *********
  FOR RELEASE VM/ESA CP/ESA R630 :
  PREREQ: VM65965
  CO-REQ: NONE
  IF-REQ: NONE
  FOR RELEASE VM/ESA CP/ESA R640 :
  PREREQ: VM65965
  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:

  UM35075 UM35076

Modules/Macros

• HCPSDV
  

Fix information

• Fixed component name

  VM CP

• Fixed component ID

  568411202

Applicable component levels

• R630 PSY UM35075

     UP17/08/25 P 1701 ­

• R640 PSY UM35076

     UP17/03/08 P 1701 ­

Fix is available

• Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.