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IV67208: SETTING RECEIVE_Q_ELEM HIGH ON CT3 REDRIVER MAKES IFCONFIG HANG APPLIES TO AIX 7100-03

A fix is available

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APAR status

  • Closed as program error.

Error description

  • Setting "receive_q_elem" to a high value on the CT3
    (RedRiver) adapter causes a hang in ifconfig. The hang is
    caused because the memory requested by the adapter is
    bigger than a heap segment (256MB).
    
    The hang can occur during ifconfig at bootup (causing a
    boot
    hang) or when running ifconfig is done at the command
    line
    after changing the variable to a high value.
    

Local fix

  • The workaround for this problem is to leave
    "receive_q_elem" at its default value of 4096.
    
    Values higher than 19,0000 are expected to cause the
    hang.
    

Problem summary

  • Setting "receive_q_elem" to a high value bigger than a heap
    segment (256MB)on the CT3 (RedRiver) adapter causes a hang
    in ifconfig.
    

Problem conclusion

  • Correct the netmalloc code such that ifconfig will not hang,
    when memory requested by the adapter is bigger than a
    heap segment (256MB)
    

Temporary fix

Comments

  • 6100-08 - use AIX APAR IV70724
    6100-09 - use AIX APAR IV68001
    7100-02 - use AIX APAR IV66673
    7100-03 - use AIX APAR IV67208
    

APAR Information

  • APAR number

    IV67208

  • Reported component name

    AIX V7.1

  • Reported component ID

    5765H4000

  • Reported release

    710

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Submitted date

    2014-11-21

  • Closed date

    2014-11-21

  • Last modified date

    2015-09-30

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

    IV66673

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

    IV68069

Fix information

  • Fixed component name

    AIX V7.1

  • Fixed component ID

    5765H4000

Applicable component levels

  • R710 PSY U865837

       UP15/05/19 I 1000

PTF to Fileset Mapping



Document information

More support for: AIX Enterprise Edition

Software version: 710

Operating system(s): AIX

Reference #: IV67208

Modified date: 30 September 2015