Symptoms

Dell EMC SW: PowerPath for AIX 6.4CRASH INFORMATION:CPU 16 CSA F00000002FF47600 at time of crash, error code for LEDs: 30000000pvthread+010300 STACK:[F1000000C07A8608]powerdd:PowerEnqueue+000028 (F1000000C04DFEF0, 0000000000000000)[F1000000C07AAC0C]powerdd:PowerGetSemaNew+00020C (F1000000C04DFE90, 0000000100000001)[F1000000C07AAD78]powerdd:PowerGetSema+000018 (F1000000C04DFE90)[F1000000C04D249C]mpxext:MpxGetHostInfo+00009C (F1000000C04DFF60, F1000000C04DC940)[F1000000C049815C]mpxext:MpxDeviceMountStatsRpt+00005C (F1000A03F0900800, 15C06FB653F3BC50)[F1000000C049AA6C]mpxext:MpxPeriodicCallout+001EEC (F1000A03F01C2100)[F1000000C07AD4CC]powerdd:PowerServiceDaemonQ+00010C (F1000A03F06D3E00)[F1000000C07CDCD4]powerdd:PowerServiceDaemonQWrap+000074 (0000000000000000, 0FFFFFFFF3FFFFF0, 0000000800000008)[00014D70].hkey_legacy_gate+00004C ()[0029B310]procentry+000010 (??, ??, ??, ??)[kdb_real_mem] no real storage @ FFFFFFFFFFF5D50(16)> th SLOT NAME STATE TID PRI RQ CPUID CL WCHANpvthread+010300 259*MpxPerio RUN 103006B 03C 16 0NAME................ MpxPeriodicCallbackDaemonFLAGS............... KTHREAD..(16)> vmlogMost recent VMM errorlog entryError id = DSI_PROCException DSISR/ISISR = 000000000A000000Exception srval = 00007FFFFFFFD080Exception virt addr = 0000000000000008Exception value = 00000086 EXCEPT_PROT(16)> 

Cause

PowerPath for AIX 6.4 bug A race condition due to a NULL de-reference in the thread involving multiple function calls from PowerPath 6.4 code.

Resolution

WorkaroundDisable the "device in use to array report" feature.FixFixed in PowerPath for AIX 7.0 which is currently available for download at the support site.

Support Cases