A fix is available
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
IV49476
Reported component name
AIX V7.1
Reported component ID
5765H4000
Reported release
710
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Submitted date
2013-09-18
Closed date
2013-09-18
Last modified date
2014-02-17
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Fix information
Fixed component name
AIX V7.1
Fixed component ID
5765H4000
Applicable component levels
R710 PSY U864711
UP14/02/17 I 1000
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Document Information
Modified date:
17 February 2014