C/B-Series f/w 6.42.12.0007 Reset with "event_data" error after Many Messages logged


Userlevel 3
Article ID: 14715

Products
C5-Series, firmware 6.42.12.0007
C3-Series, firmware 6.42.12.0007
B5-Series, firmware 6.42.12.0007
B3-Series, firmware 6.42.12.0007

Symptoms
Many messages displayed (for any reason) in the current.log, followed by a system reboot event.

The current.log (5487) displays a register-rich set of BackTraces, plus a "Fault(0x00000300)" reset cause; for example:<57> MAY 11 18:33:46 2012 STK1 BOOT[268430624]: bootos.c(1405) 316 %%
Start of Code - Build:06.42.12.0007 Date:Thu Apr 26 16:06:55 2012
BackTrace-r0 = 0x00000000 r1 = 0x06b957b0 r2 = 0x00000000 r3 = 0x00000000
BackTrace-r4 = 0x00003030 r5 = 0x00000050 r6 = 0x00000001 r7 = 0x053e0c3a
BackTrace-r8 = 0x01d70000 r9 = 0x00000000 r10 = 0x00022440 r11 = 0x00000111
BackTrace-r12 = 0x011d330c r13 = 0x00000000 r14 = 0x00000000 r15 = 0x00000001
BackTrace-r16 = 0x00000000 r17 = 0x06b95920 r18 = 0x00000000 r19 = 0x00000dad
BackTrace-r20 = 0x06b97750 r21 = 0x00000003 r22 = 0x0163947d r23 = 0x01d70000
BackTrace-r24 = 0x06b957d0 r25 = 0x00000001 r26 = 0x00000007 r27 = 0x053e0a38
BackTrace-r28 = 0x0000007a r29 = 0x053e0a8c r30 = 0x000000a0 r31 = 0x06b957e0
BackTrace-lr = 0x005c5c04 pc = 0x005c5c0c msr = 0x00000000
<110> MAY 11 18:34:08 2012 STK1 BOOT[138232616]: edb_bxs.c(1226) 326 %%
Last switch reset caused by Fault(0x00000300) SRR0(0x005C5C0C) SRR1(0x0000B030)
DMISS(0x00000000) IMISS(0x00000000) DAR(0x00000000) DSISR(0x0A000000)[/code]The sysDmp (13650) file states "Task Name: CPLD_Status" and the diagnostic points to "event_data"; for example:Detailed erred task information
---------------------------------
Calling Stack:

------------
Task ID: 0x6b97750
Task Name: CPLD_Status
PC: 0x11d8a64
PendQ: 0x6acaa34
SP: 0x2d6428c

0x11d8a64: taskSuspend (0x11d8628) + 0x43c
0x100525c: log_fault_nvram (0x1004f74) + 0x2e8
0x101514c: event_data (0x1014f38) + 0x214
0x1014f38: event_data (0x1014f38) + 0x0
Symbol not found for 0x2d332053[/code]Cause
Running out of buffers due to an excessive amount of log messaging.

Solution
Upgrade to firmware 6.42.13.0002 or higher.
Release notes state, in the 'Firmware Changes and Enhancements' section:
code:
17111
code:
Addressed a buffer allocation issue due to excessive amount of log messages reported on a stack member unit. This resulted in an exception fault and reset with message "Last switch reset caused by Fault(0x00000300) SRR0(0x005C5C0C) SRR1(0x0000B030) DMISS(0x00000000) IMISS(0x00000000) DAR(0x00000000) DSISR(0x0A000000)".

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