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IV49394: CRASH IN V_PFEND_FSEG_PGOUT WHILE VMM IS PROCESSING NFS PAGE APPLIES TO AIX 7100-01

A fix is available

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APAR status

  • Closed as program error.

Error description

  • **************************************************************
    * USERS AFFECTED:
    * Systems running the 7100-01 Technology Level with
    * bos.mp64 below the 7.1.1.20 level.
    **************************************************************
    * PROBLEM DESCRIPTION:
    * Customers running NFS could see a system crash on an NFS
    * client, while VMM is processing pageout of an NFS page.
    * The crash stack will be similar to:
    *     (0)> f
    *     pvthread+000C00 STACK:
    *     ■00022080abend_trap+000000 ()
    *     ■00343DECv_pfend_fseg_pgout+00086C ()
    *     ■003467B8v_pfend_fseg+000518 ()
    *     ■0034A19Cv_pfend_com+00053C ()
    *     ■00394510v_vtiol_dequeue+000190 ()
    *     ■000717A8begfst+000128 ()
    **************************************************************
    * RECOMMENDATION:
    * Install APAR IV49394.
    **************************************************************
    

Local fix

  • System will reboot. No workaround
    

Problem summary

  • **************************************************************
    * USERS AFFECTED:
    * Systems running the 7100-01 Technology Level with
    * bos.mp64 below the 7.1.1.20 level.
    **************************************************************
    * PROBLEM DESCRIPTION:
    * Customers running NFS could see a system crash on an NFS
    * client, while VMM is processing pageout of an NFS page.
    * The crash stack will be similar to:
    *     (0)> f
    *     pvthread+000C00 STACK:
    *      00022080 abend_trap+000000 ()
    *      00343DEC v_pfend_fseg_pgout+00086C ()
    *      003467B8 v_pfend_fseg+000518 ()
    *      0034A19C v_pfend_com+00053C ()
    *      00394510 v_vtiol_dequeue+000190 ()
    *      000717A8 begfst+000128 ()
    **************************************************************
    * RECOMMENDATION:
    * Install APAR IV49394.
    **************************************************************
    

Problem conclusion

  • Change the VMM NFS client gather pages routine to not gather
    both COMMIT and ASYNC page requests in the same stuct bufx I/O.
    

Temporary fix

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

Comments

APAR Information

  • APAR number

    IV49394

  • Reported component name

    AIX V7.1

  • Reported component ID

    5765H4000

  • Reported release

    710

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    YesHIPER

  • Submitted date

    2013-09-18

  • Closed date

    2013-09-18

  • Last modified date

    2014-06-05

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

    IV44039

  • 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 U860252

       UP14/02/14 I 1000

PTF to Fileset Mapping

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Document Information

Modified date:
05 June 2014