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Redhat EL5 Intermittent server restart - MTTR type mismatch for e8000000,4000000 old: uncachable ne

Per Elmgreen
Occasional Visitor

Redhat EL5 Intermittent server restart - MTTR type mismatch for e8000000,4000000 old: uncachable ne

My HP server ProLiant DL360 G6, Redhat EL5 2.6.18-194.el5 64 bit is failing with intermittent server restarts.

Support Pack installed: psp-8.60.rhel5.x86_64

Initially we had some cooling issues which meant the server restarted outside business hours - but not during business hours. A/C has now been upgraded.

Instead I'm having "random" server restarts.
The HP management console do not log any H/W errors
The I/O and CPU load is low.

Should mtrr be reconfigured or disabled at boot? If so, what are the step to do this?

/var/log/messages
May 9 08:26:41 risqube vcagentd: Type: 4 - Event ID: 1073741884
May 9 08:26:43 risqube kernel: mtrr: type mismatch for e8000000,4000000 old: uncachable new: write-combining
May 9 08:34:26 risqube syslogd 1.4.1: restart.


May 9 09:32:03 risqube kernel: mtrr: type mismatch for e8000000,4000000 old: uncachable new: write-combining
May 9 09:37:04 risqube syslogd 1.4.1: restart.


I see this message in the dmesg output

dmesg:

mtrr: type mismatch for e8000000,4000000 old: uncachable new: write-combining



lspci -v:
==
01:03.0 VGA compatible controller: ATI Technologies Inc ES1000 (rev 02) (prog-if 00 [VGA controller])
Subsystem: Hewlett-Packard Company Unknown device 31fb
Flags: bus master, stepping, medium devsel, latency 64, IRQ 7
Memory at e8000000 (32-bit, prefetchable) [size=128M]
I/O ports at 3000 [size=256]
Memory at f5ff0000 (32-bit, non-prefetchable) [size=64K]
[virtual] Expansion ROM at f5e00000 [disabled] [size=128K]
Capabilities: [50] Power Management version 2


cat /proc/mtrr

reg00: base=0xe0000000 (3584MB), size= 512MB: uncachable, count=1

1 REPLY
Jan Soska
Honored Contributor

Re: Redhat EL5 Intermittent server restart - MTTR type mismatch for e8000000,4000000 old: uncachable ne

Hello,
my first recomendation is to check firmware levels on your server and update it if needed.
Second - are you able to run other OS on that server? Like live linux or other and let it run for a while?

jan