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IV56494: SYSTEM CRASH IN XMEMDMA64_LIST WHEN OPERATING ON MMAPPED BUFFER APPLIES TO AIX 6100-09

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

  • System can crash with the following stack trace, when
    system is performing DMA operations on mmapped
    address/buffers:-
    
    CPU 1 CSA F00000002FF47600 at time of crash, error code
    for LEDs: 70000000
    pvthread+01C900 STACK:
    [000EBD90]xmemdma64_list+000430 (800000281BE00001,
    F1000A08058A3090,
       000000003048B000, 000000000000000E, 000000000082FD97,
    000000000000048C [??])
    [041ABF1C]d_map_list_tce+0014DC (??, ??, ??, ??, ??)
    [042A5B3C]efc_mapdma_iocb+0006BC (??, ??)
    [042AAFA8]efc_start+000508 (??)
    [042ABD0C]efc_output+00066C (??, ??)
    [04344BF8]efsc_start+000938 (??, ??)
    [04348B9C]efsc_strategy+00101C (??)
    [042F9DB0]efsc_sciocmd+000EB0 (??, ??, ??, ??)
    [04302E8C]efsc_ioctl+00062C (??, ??, ??, ??, ??, ??)
    [0056FFC0]rdevioctl+0000C0 (??, ??, ??, ??, ??, ??)
    [00747E60]spec_ioctl+000080 (??, ??, ??, ??, ??, ??)
    [0059FFF0]vnop_ioctl+000050 (??, ??, ??, ??, ??, ??)
    [005B597C]vno_ioctl+00009C (??, ??, ??, ??, ??)
    [0068A5D8]common_ioctl+0000F8 (??, ??, ??, ??)
    [00003850]ovlya_addr_sc_flih_main+000130 ()
    [kdb_get_virtual_memory] no real storage @ 2FF219B8
    [D0130EF4]D0130EF4 ()
    

Local fix

Problem summary

  • System crash with a stack that includes:
     000EBD90 xmemdma64_list+000430 (...
     041ABF1C d_map_list_tce+0014DC (...
    This problem exists only on machines with 2GB or less memory.
    

Problem conclusion

  • Increase the size of the APT hash mask on small memory systems.
    

Temporary fix

Comments

  • 6100-07 - use AIX APAR IV55694
    6100-08 - use AIX APAR IV56438
    6100-09 - use AIX APAR IV56494
    6100-09 - use AIX APAR IV56494
    6100-09 - use AIX APAR IV56494
    7100-01 - use AIX APAR IV57489
    7100-02 - use AIX APAR IV56932
    7100-03 - use AIX APAR IV56671
    7100-04 - use AIX APAR IV56666
    

APAR Information

  • APAR number

    IV56494

  • Reported component name

    AIX 610 STD EDI

  • Reported component ID

    5765G6200

  • Reported release

    610

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Submitted date

    2014-03-10

  • Closed date

    2014-03-11

  • Last modified date

    2016-05-10

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

    IV55694

  • 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 U859304

       UP14/05/21 I 1000

PTF to Fileset Mapping



Document information

More support for: AIX Standard Edition

Software version: 610

Operating system(s): AIX

Reference #: IV56494

Modified date: 10 May 2016