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IV34794: POSSIBLE INCREASE IN RANDOM KPROC CPU USAGE. APPLIES TO AIX 7100-01

A fix is available

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APAR status

  • Closed as program error.

Error description

  • Possible increase in random kproc cpu usage;
    A typical case is where one thread opens /dev/random, but never
    reads from it. Then another thread opens /dev/random when a
    privious thread has already opened the /dev/random device,
    causing the increased cpu usage by the random kproc.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:
    * Systems running the 7100-01 Technology Levels with the
    * bos.rte.security fileset at the 7.1.1.18 level.
    ****************************************************************
    * PROBLEM DESCRIPTION:
    * Possible increase in random kproc cpu usage;
    * A typical case is where one thread opens /dev/random, but neve
    r* reads from it. Then another thread opens /dev/random when a
    * privious thread has already opened the /dev/random device,
    * causing the increased cpu usage by the random kproc.
    ****************************************************************
    * RECOMMENDATION:
    * Install APAR IV34794.
    ****************************************************************
    

Problem conclusion

  • Modified the random device driver' kproc so to handle to case
    where a thread may open /dev/random device, but never closes
    it.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IV34794

  • Reported component name

    AIX V7.1

  • Reported component ID

    5765H4000

  • Reported release

    710

  • Status

    CLOSED PER

  • PE

    YesPE

  • HIPER

    NoHIPER

  • Submitted date

    2013-01-15

  • Closed date

    2013-01-15

  • Last modified date

    2013-11-25

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

    IV33203

  • 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 U854872

       UP13/04/25 I 1000

PTF to Fileset Mapping

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Document Information

Modified date:
25 November 2013