IBM Support

IV47412: SYSTEM CRASH WITH DEEP I/O STACK BACKPORT APPLIES TO AIX 6100-07

A fix is available

Subscribe

You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • A system crash with varying stack but always a large number of
    calls to storage layer functions. For example:
    
    00129C74v_lookupx_dr+000074 ()
    ■00129BA4vm_lookupx_dr+000044 (??, ??, ??, ??, ??)
    ■000B21A4xmemdma64+000564 (??, ??, ??)
    ■04214BF8d_map_page_tce+000918 (??, ??, ??, ??, ??)
    ■042700A8efc_mapdma_iocb+0010E8 (??, ??)
    ■04277AB8efc_start+000518 (??)
    ■04278818efc_output+000698 (??, ??)
    ■04475ED8efsc_start+000698 (??, ??)
    ■044795D8efsc_strategy+000D98 (??)
    ■002D2564std_devstrat+000364 (??)
    ■002D2B90devstrat+000050 (??)
    ■044BB4B8SCSIDISK_ISSUE_CMD+0001B8 (??, ??)
    ■044D8A40scsidisk_start_in_progress+000380 (??)
    ■044E0B10scsidisk_start+0006D0 (??)
    ■044E39D8scsidisk_strategy+000278 (??)
    ...
    

Local fix

Problem summary

  • A system crash with varying stack but always a large number of
    calls to storage layer functions. For example:
    
    00129C74 v_lookupx_dr+000074 ()
     00129BA4 vm_lookupx_dr+000044 (??, ??, ??, ??, ??)
     000B21A4 xmemdma64+000564 (??, ??, ??)
     04214BF8 d_map_page_tce+000918 (??, ??, ??, ??, ??)
     042700A8 efc_mapdma_iocb+0010E8 (??, ??)
     04277AB8 efc_start+000518 (??)
     04278818 efc_output+000698 (??, ??)
     04475ED8 efsc_start+000698 (??, ??)
     044795D8 efsc_strategy+000D98 (??)
     002D2564 std_devstrat+000364 (??)
     002D2B90 devstrat+000050 (??)
     044BB4B8 SCSIDISK_ISSUE_CMD+0001B8 (??, ??)
     044D8A40 scsidisk_start_in_progress+000380 (??)
     044E0B10 scsidisk_start+0006D0 (??)
     044E39D8 scsidisk_strategy+000278 (??)
    ...
    

Problem conclusion

  • We added another page to the lowest interrupt level stack, and
    implemented this so that we can easily add more pages and/or
    more levels.
    

Temporary fix

Comments

  • 6100-07 - use AIX APAR IV47412
    6100-08 - use AIX APAR IV47073
    7100-01 - use AIX APAR IV49476
    7100-02 - use AIX APAR IV49179
    

APAR Information

  • APAR number

    IV47412

  • Reported component name

    AIX 610 STD EDI

  • Reported component ID

    5765G6200

  • Reported release

    610

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Submitted date

    2013-08-22

  • Closed date

    2013-08-22

  • Last modified date

    2014-02-17

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

    IV47073

  • 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 U864815

       UP14/02/17 I 1000



Document information

More support for: AIX Standard Edition

Software version: 610

Operating system(s): AIX

Reference #: IV47412

Modified date: 17 February 2014


Translate this page: