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IV19995: JFS2 FILESYSTEM HANG IN BMASSIGN APPLIES TO AIX 6100-08

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

  • On AIX 6.1 TL5 and later TLs a JFS2 filesystem may hang,
    causing all commands accessing that filesystem to hang
    and to be unkillable.  The only way to recover is to
    reboot the system.
    
    The dump will show a thread waiting in bmAssign:
    [000D50D0]e_block_thread+000290 ()
    [000D5D28]e_sleep_thread+0000E8 (??, ??, ??)
    [00260B38]bmAssign+000778 (??, ??, ??, ??, ??, ??)
    [0025FDFC]bmRead+00009C (??, ??, ??, ??, ??, ??)
    [002B363C]xtTruncate+0009DC (??, ??, ??, ??, ??)
    [00299FDC]txLog+00029C (??, ??, ??)
    [0029C3D4]txCommit+000654 (??, ??, ??, ??)
    [002D3C58]j2_remove+000438 (??, ??, ??, ??)
    [005838A4]vnop_remove+0003E4 (??, ??, ??, ??)
    [0067B9C0]kunlink+000300 (??, ??)
    and other threads waiting for locks held by that thread
    or waiting in bmFlushRead for the same pager buffer.
    

Local fix

  • Reboot the system.
    

Problem summary

  • hand on bmAssign with following stack:
    
    pvthread+0B6E00 STACK:
     000D3870 e_block_thread+000290 ()
     000D44C8 e_sleep_thread+0000E8 (??, ??, ??)
     0023D258 bmAssign+000778 (??, ??, ??, ??, ??, ??)
     0023C51C bmRead+00009C (??, ??, ??, ??, ??, ??)
     00289F8C xtFreeMap+00018C (??, ??, ??)
     00275094 txUpdateMap+000254 (??, ??)
     00278258 txCommit+0006D8 (??, ??, ??, ??)
     002AF178 j2_remove+000438 (??, ??, ??, ??)
     0057C0A4 vnop_remove+0003E4 (??, ??, ??, ??)
     00672580 kunlink+000300 (??, ??)
     00003850 ovlya_addr_sc_flih_main+000130 ()
     kdb_get_virtual_memory  no real storage @ 700000000596440
     1000624B4 00000001000624B4 ()
    

Problem conclusion

  • Track buffer RDONLY users via separate data field and manage
    accordingly
    

Temporary fix

Comments

APAR Information

  • APAR number

    IV19995

  • Reported component name

    AIX 610 STD EDI

  • Reported component ID

    5765G6200

  • Reported release

    610

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Submitted date

    2012-04-23

  • Closed date

    2012-04-23

  • Last modified date

    2013-02-23

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

    IV16158

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

Fix information

  • Fixed component name

    AIX 610 STD EDI

  • Fixed component ID

    5765G6200

Applicable component levels

  • R610 PSY U845040

       UP12/10/23 I 1000

PTF to Fileset Mapping

[{"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Product":{"code":"SSMV87","label":"AIX 6.1 Enterprise Edition"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"610","Edition":"","Line of Business":{"code":"LOB08","label":"Cognitive Systems"}},{"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SSMVAX","label":"AIX Express Edition"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"610","Edition":"","Line of Business":{"code":"LOB08","label":"Cognitive Systems"}},{"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Product":{"code":"SSAUMY","label":"IBM AIX Enterprise Edition"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"610","Edition":"","Line of Business":{"code":"","label":""}},{"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Product":{"code":"SG11Q","label":"AIX 6.1 HIPERS, APARs and Fixes"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"610","Edition":"","Line of Business":{"code":"","label":""}}]

Document Information

Modified date:
23 February 2013