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IZ82769: TAKING THE CACHEP->C_LOG_MUTEX LOCK TWICE IN LOG_ERROR PATH APPLIES TO AIX 5300-10

A fix is available

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APAR status

  • Closed as program error.

Error description

  • Stack trace looks like this:
    
    ■0001BEE0abend_trap+000000 ()
    ■005500F4slock+0007D4 (??, ??)
    ■00009558.simple_lock+000058 ()
    ■04E5B3B0cachefs_log_error+0001B0 (??, ??, ??)
    ■04E5BA94cachefs_log_process_queue+0002F4 (??, ??)
    ■04E5BBD8cachefs_log_kstat_snapshot+000098 (??, ??, ??)
    ■04E8BC70cachefs_ctl+000890 (??, ??, ??)
    ■00003850ovlya_addr_sc_flih_main+000130 ()
    ■10001C9Ckstat_write+00001C (??, ??, ??)
    ■1000CD78stats_log_kernel_setname+000238 (??, ??)
    ■1000051Cmain+0001FC (??, ??)
    ■10000168__start+000068 ()
    

Local fix

Problem summary

  • Stack trace looks like this:
    
     0001BEE0 abend_trap+000000 ()
     005500F4 slock+0007D4 (??, ??)
     00009558 .simple_lock+000058 ()
     04E5B3B0 cachefs_log_error+0001B0 (??, ??, ??)
     04E5BA94 cachefs_log_process_queue+0002F4 (??, ??)
     04E5BBD8 cachefs_log_kstat_snapshot+000098 (??, ??, ??)
     04E8BC70 cachefs_ctl+000890 (??, ??, ??)
     00003850 ovlya_addr_sc_flih_main+000130 ()
     10001C9C kstat_write+00001C (??, ??, ??)
     1000CD78 stats_log_kernel_setname+000238 (??, ??)
     1000051C main+0001FC (??, ??)
     10000168 __start+000068 ()
    

Problem conclusion

  • Modify the function argument to cachefs_log_error() so that
    it won't take the lock.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IZ82769

  • Reported component name

    AIX 5.3

  • Reported component ID

    5765G0300

  • Reported release

    530

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Submitted date

    2010-08-11

  • Closed date

    2010-08-11

  • Last modified date

    2013-04-11

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

    IZ74949

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

Fix information

  • Fixed component name

    AIX 5.3

  • Fixed component ID

    5765G0300

Applicable component levels

  • R530 PSY U837913

       UP10/09/20 I 1000

PTF to Fileset Mapping

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Document Information

Modified date:
11 April 2013