A fix is available
APAR status
Closed as program error.
Error description
AIX can crash when running on High End P8 model E880 (9119-MHE) Only LPARs running AIX 7.1 TL3 SP3 and later, in native P8 mode, are exposed. Any such LPAR running on a system with more than 128 total cores is exposed, which is possible only with the the above P8 models configured with 3 or more drawers of the 48 core node, or 4 drawers of the 32 core node. . This problem is resolved in SP5. For SP3 and SP4, ifixes are available here: ftp://aix.software.ibm.com/aix/ifixes/IV69116/ https://aix.software.ibm.com/aix/ifixes/IV69116/ The ifix is concurrent update capable, but will require temporarily disabling CPU folding. You can disable folding and install as a hotpatch with: > schedo -o vpm_fold_policy=0 > emgr -i <ifix.epkg.Z> -C > schedo -o vpm_fold_policy=(previous setting) . Customers installing AIX 7.1 TL3 on the above model P8 with more than 128 total cores need to set the system to run in P7 compat mode before attempting installation or the boot for the install will fail. After installation, apply the SP5 or the ifix above, and then the system can be set to run in P8 mode.
Local fix
Problem summary
AIX kernel incorrectly thinks maximum possible processors is 1024 in some places. This limit can be surpassed with 3 & 4 node configurations of E880 systems.
Problem conclusion
Correct AIX logic to allow for the maximum possible processors.
Temporary fix
Comments
6100-08 - use AIX APAR IV70108 6100-09 - use AIX APAR IV69078 7100-02 - use AIX APAR IV70228 7100-03 - use AIX APAR IV69116
APAR Information
APAR number
IV69116
Reported component name
AIX V7.1
Reported component ID
5765H4000
Reported release
710
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Submitted date
2015-02-02
Closed date
2015-02-02
Last modified date
2015-09-30
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 U865837
UP15/05/19 I 1000
PTF to Fileset Mapping
U865837 bos.mp64 7.1.3.45
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Document Information
Modified date:
30 September 2015