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IV62497: ASSERT IN VPM_UNFOLD_CPU(). APPLIES TO AIX 7100-04

A fix is available

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You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • System crash with following stack:
    [00022080]abend_trap+000000 ()
    [002FCFA4]vpm_unfold_cpu+0000A4 ()
    [00082CA0]rsnm_mkxrset+000540 (??, ??)
    [00793004]rsnm_set_named_rset+000224 (??, ??, ??, ??, ??)
    [007936BC]registername+00013C (??, ??, ??, ??, ??, ??)
    [0000386C]ovlya_addr_sc_flih_main+00014C ()
    

Local fix

Problem summary

  • If the system is having 'n' number of logical CPUs.
    Disabling external interrupts on 'm' logical CPUs ( m < n)
    and then creating exclusive rset with n-m CPUs is causing
    system crash.
    

Problem conclusion

  • Creation of exclusive rset code is not taking care of
    external interrupt disabled CPUs during the resource set
    input validation and it should return with invalid value
    as that will cause number of genereal purpose CPUs (gpcpus)
    on LPAR to become '0' with current implementation.
    

Temporary fix

Comments

  • 6100-08 - use AIX APAR IV64422
    6100-09 - use AIX APAR IV62438
    6100-09 - use AIX APAR IV62438
    7100-02 - use AIX APAR IV64241
    7100-03 - use AIX APAR IV62394
    7100-04 - use AIX APAR IV62497
    

APAR Information

  • APAR number

    IV62497

  • Reported component name

    AIX V7.1

  • Reported component ID

    5765H4000

  • Reported release

    710

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Submitted date

    2014-07-14

  • Closed date

    2014-07-14

  • Last modified date

    2016-05-11

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

    IV60450

  • 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 U863867

       UP15/11/22 I 1000

PTF to Fileset Mapping

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Document Information

Modified date:
11 May 2016