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IV66483: LOOP IN PRUBLOCKSEGATTACH DUE TO SIGNAL APPLIES TO AIX 7100-03

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

  • Many processes spinning in:
    
    (0)> f
    pvthread+059300 STACK:
    [00009904].simple_unlock+000004 ()
    [000F23C4]e_block_thread+0004A4 ()
    [000F2D28]e_sleep_thread+0000E8 (??, ??, ??)
    [000ECDC8]prUblockSegAttach+000068 (??, ??)
    [0043CD34]prGetPsinfo+0005F4 (??, ??, ??)
    [0043CEE8]prReadPsinfo+000168 (??, ??, ??, ??, ??, ??,
    ??, ??)
    [00439B78]procfsRdwr+0001D8 (??, ??, ??, ??, ??, ??, ??,
    ??)
    [006009F4]vnop_rdwr+000814 (??, ??, ??, ??, ??, ??, ??,
    ??)
    [00619AB4]vno_rw+0000B4 (??, ??, ??, ??, ??)
    [005AF020]rwuio+000100 (??, ??, ??, ??, ??, ??)
    [005AF368]rdwr+000188 (??, ??, ??, ??, ??, ??)
    [005AEEDC]keread+00013C (??, ??, ??, ??)
    [00003888]mfspurr_sc_flih01+0000E4 ()
    [kdb_get_virtual_memory] no real storage @
    FFFFFFFFFFF52C0
    [90000000002E830]090000000002E830 ()
    [kdb_read_mem] no real storage @ FFFFFFFFFFF90B0
    
    With signals pending:
    
    (0)> th 1427
                    SLOT NAME     STATE    TID PRI   RQ CPUID
     CL  WCHAN
    
    pvthread+059300 1427*oracle   RUN   5930007 03C    0
       0
    
    ...
    FLAGS............... SIGAVAIL CDEFER (SIGSLIH) (SIGINTR)
    

Local fix

Problem summary

  • Customer experience Deadlock when the process is executing
    prochandler as a part of process exec/exit  and reading its
    own psinfo from procfs File system and another
    process is just reading the psinfo of the process
    which is executing in prochandler
    

Problem conclusion

  • Solution is to  check for THREAD_INTERRUPTED after sleep
    in process ublock segment attach routines
    

Temporary fix

Comments

  • 7100-03 - use AIX APAR IV66483
    

APAR Information

  • APAR number

    IV66483

  • Reported component name

    AIX V7.1

  • Reported component ID

    5765H4000

  • Reported release

    710

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Submitted date

    2014-10-31

  • Closed date

    2014-12-01

  • Last modified date

    2015-12-31

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

    IV65789

  • 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 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 #: IV66483

Modified date: 31 December 2015