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

A fix is available

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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 number

    IV67876

  • Reported component name

    AIX V7.1

  • Reported component ID

    5765H4000

  • Reported release

    710

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    YesHIPER

  • Submitted date

    2014-12-12

  • Closed date

    2014-12-12

  • Last modified date

    2016-05-10

  • 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



Document information

More support for: AIX Enterprise Edition

Software version: 710

Operating system(s): AIX

Reference #: IV67876

Modified date: 10 May 2016