IBM Support

IZ83388: CRASH AT VNOP_HOLD DURING UNMOUNT APPLIES TO AIX 6100-06

A fix is available

Subscribe

You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • machine crashed due to autofs daemon unmounting an autofs
    mount. the stack trace looks like
    (6)> f
    pvthread+074500 STACK:
    ■005D9F08vnop_hold+000028 (7777777777777777 ■??)
    ■080B18E8auto_new_mount_thread+000288 (??, ??, ??)
    ■080BDC68auto_trigger_mount+0001A8 (??, ??, ??)
    ■080C261Cauto_access+00023C (??, ??, ??, ??)
    ■080ABCA4aix2onc_access+0001C4 (??, ??, ??, ??)
    ■005DB9ACvnop_access+0001EC (??, ??, ??, ??)
    ■080C22C0auto_lookup+000BC0 (??, ??, ??, ??, ??, ??, ??)
    ■080AAC94aix2onc_lookup+000094 (??, ??, ??, ??, ??, ??)
    ■005D9514vnop_lookup+0001D4 (??, ??, ??, ??, ??, ??)
    ■0059A7D8lookuppn+000918 (??, ??, ??, ??, ??, ??, ??, ??)
    ■0059B118lookupname_internal+0001F8 (??, ??, ??, ??, ??,
    ??, ??, ??)
    ■006E6DFCchdirec+00005C (??, ??, ??, ??)
    ■006E6B20chdir+0000A0 (??)
    ■0000386Covlya_addr_sc_flih_main+00014C ()
    Looks like the mount got unmounted when there is a process
    doing a lookup within the root directory of that autofs
    file system.
    

Local fix

Problem summary

  • machine crashed due to autofs daemon unmounting an autofs
    mount. the stack trace looks like
    (6)> f
    pvthread+074500 STACK:
     005D9F08 vnop_hold+000028 (7777777777777777  ?? )
     080B18E8 auto_new_mount_thread+000288 (??, ??, ??)
     080BDC68 auto_trigger_mount+0001A8 (??, ??, ??)
     080C261C auto_access+00023C (??, ??, ??, ??)
     080ABCA4 aix2onc_access+0001C4 (??, ??, ??, ??)
     005DB9AC vnop_access+0001EC (??, ??, ??, ??)
     080C22C0 auto_lookup+000BC0 (??, ??, ??, ??, ??, ??, ??)
     080AAC94 aix2onc_lookup+000094 (??, ??, ??, ??, ??, ??)
     005D9514 vnop_lookup+0001D4 (??, ??, ??, ??, ??, ??)
     0059A7D8 lookuppn+000918 (??, ??, ??, ??, ??, ??, ??, ??)
     0059B118 lookupname_internal+0001F8 (??, ??, ??, ??, ??,
    ??, ??, ??)
     006E6DFC chdirec+00005C (??, ??, ??, ??)
     006E6B20 chdir+0000A0 (??)
     0000386C ovlya_addr_sc_flih_main+00014C ()
    Looks like the mount got unmounted when there is a process
    doing a lookup within the root directory of that autofs
    file system.
    

Problem conclusion

  • before we unmount the trigger mount, don't decrease the hold
    count on the vnode
    

Temporary fix

Comments

  • 5300-10 - use AIX APAR IZ90949
    5300-11 - use AIX APAR IZ85455
    5300-12 - use AIX APAR IZ91220
    6100-04 - use AIX APAR IZ83991
    6100-05 - use AIX APAR IZ83956
    6100-06 - use AIX APAR IZ83388
    7100-00 - use AIX APAR IZ84546
    

APAR Information

  • APAR number

    IZ83388

  • Reported component name

    AIX 610 STD EDI

  • Reported component ID

    5765G6200

  • Reported release

    610

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Submitted date

    2010-08-22

  • Closed date

    2010-08-22

  • Last modified date

    2013-03-27

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

    IZ83084

  • 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 U835918

       UP11/05/10 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:
27 March 2013