A fix is available
APAR status
Closed as program error.
Error description
The gsclvmd daemon may core dump due to stack corruption while processing an extend/reduce request of a logical volume belonging to a scalable volume group when the logical volume is mapped to more than 128 disks. Error log from the core dump shows incomplete stack due to stack corruption: LABEL: CORE_DUMP IDENTIFIER: A924A5FC Date/Time: Thu Dec 15 09:24:30 2011 Sequence Number: 15917 Machine Id: 00F65C294C00 Node Id: epcsgf21 Class: S Type: PERM WPAR: Global Resource Name: SYSPROC COME FROM ADDRESS REGISTER gs_reduce 6A0 PROCESSOR ID hw_fru_id: 3 hw_cpu_id: 31 ADDITIONAL INFORMATION ?? ?? Unable to generate symptom string.
Local fix
Logical volumes should be mapped to less than 128 disks.
Problem summary
gsclvmd daemon code to handle extending an LV does not correctly handle when an LV is mapped to more than 128 disks. In this case, process stack is messed up and various results can happen, most likely core dump of gsclvmd daemon.
Problem conclusion
Allocate enough space in gsclvmd for it to handle LVs on more than 128 disks.
Temporary fix
Comments
APAR Information
APAR number
IV17224
Reported component name
AIX 610 STD EDI
Reported component ID
5765G6200
Reported release
610
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Submitted date
2012-03-13
Closed date
2012-03-13
Last modified date
2013-02-26
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 610 STD EDI
Fixed component ID
5765G6200
Applicable component levels
R610 PSY U839540
UP12/05/11 I 1000
PTF to Fileset Mapping
U839540 bos.clvm.enh 6.1.7.15
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Document Information
Modified date:
26 February 2013