IV67876: LPM TO P7+ OR P8 FOLLOWED BY DLPAR CAN CRASH THE LPAR APPLIES TO AIX 7100-03

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• ***************************************************************
  * USERS AFFECTED:
  * Systems running the AIX 7100-03 Technology Level
  * with devices.chrp.base.rte below the 7.1.3.45 level.
  ***************************************************************
  * PROBLEM DESCRIPTION:
  * LPAR Migration (LPM) from p6 or p7 systems to p7+ or p8
  * systems will add some information about new accelerators
  * to the IPL Control Block (IPLCB).
  * After LPM, some DLPAR functions, like adding CPU, can
  * overwrite the new information in the IPLCB.
  * After LPM and DLPAR operations, various parts of AIX may
  * access and use the bad data in the IPLCB in ways that result
  * in the LPAR crashing.
  ***************************************************************
  * RECOMMENDATION:
  * Install APAR IV67876.
  * Prior to fix availability, an interim fix is available from
  * either
  * ftp://aix.software.ibm.com/aix/ifixes/iv67876/
  * https://aix.software.ibm.com/aix/ifixes/iv67876/
  * This ifix can be installed before or after LPM to prevent
  * the problem and does not require a reboot.
  ***************************************************************
  

Local fix

Problem summary

• ***************************************************************
  * USERS AFFECTED:
  * Systems running the AIX 7100-03 Technology Level
  * with devices.chrp.base.rte below the 7.1.3.45 level.
  ***************************************************************
  * PROBLEM DESCRIPTION:
  * LPAR Migration (LPM) from p6 or p7 systems to p7+ or p8
  * systems will add some information about new accelerators
  * to the IPL Control Block (IPLCB).
  * After LPM, some DLPAR functions, like adding CPU, can
  * overwrite the new information in the IPLCB.
  * After LPM and DLPAR operations, various parts of AIX may
  * access and use the bad data in the IPLCB in ways that result
  * in the LPAR crashing.
  ***************************************************************
  * RECOMMENDATION:
  * Install APAR IV67876.
  * Prior to fix availability, an interim fix is available from
  * either
  * ftp://aix.software.ibm.com/aix/ifixes/iv67876/
  * https://aix.software.ibm.com/aix/ifixes/iv67876/
  * This ifix can be installed before or after LPM to prevent
  * the problem and does not require a reboot.
  ***************************************************************
  

Problem conclusion

• Modify IPLCB update code after LPM.
  

Temporary fix

• *********
  * HIPER *
  *********
  

Comments

• 6100-08 - use AIX APAR IV71109
  6100-09 - use AIX APAR IV59492
  7100-02 - use AIX APAR IV71110
  7100-03 - use AIX APAR IV67876
  

APAR Information

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

  IV59492

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

Fix information

• Fixed component name

  AIX V7.1

• Fixed component ID

  5765H4000

Applicable component levels

• R710 PSY U865817

     UP15/05/19 I 1000 Ž

PTF to Fileset Mapping

• U865817 devices.chrp.base.rte 7.1.3.45