Re: Hangs and reboots under high loads, oops with DEBUG_SHIRQ

From: Mr. James W. Laferriere
Date: Sat Aug 04 2007 - 18:57:09 EST


Hello Atilla ,

On Thu, 2 Aug 2007, Attila Nagy wrote:
On 2007.08.01. 0:08, Roger Heflin wrote:
Attila Nagy wrote:
HARDWARE ERROR
HARDWARE ERROR. This is *NOT* a software problem!
Please contact your hardware vendor
CPU 1 BANK 0 TSC 1167e915e93ce
MCG status:RIPV MCIP
MCi status:
Uncorrected error
Error enabled
Processor context corrupt
MCA: Internal Timer error
STATUS b200004010000400 MCGSTATUS 5
This is not a software problem!
Run through mcelog --ascii to decode and contact your hardware vendor

HARDWARE ERROR
HARDWARE ERROR. This is *NOT* a software problem!
Please contact your hardware vendor
CPU 1 BANK 5 TSC 1167e915e9ea8
MCG status:RIPV MCIP
MCi status:
Uncorrected error
Error enabled
Processor context corrupt
MCA: Internal Timer error
STATUS b200221024080400 MCGSTATUS 5
This is not a software problem!
Run through mcelog --ascii to decode and contact your hardware vendor

Attila,

We had some issues with very similar boards all of the problems
seem to be around the PCIX bus area of the machine, setting the
PCIX buses to 66 mhz in the bios made things stable (but slow). Not using
the PCIX bus also seemed to make things work. We got MCE's and
other odd crashes under heavy IO loads. I believe turning things
down to 100mhz made things more stable, but things still crashed.

Supermicro reported being able to fix the issue with:
setting the PCI Configuration -> PCI-e I/O performance
setting to Colasce 128B.

I am not exactly sure where to set it as we did not try it
as we had already changed to a different motherboard that did not
have the issue.

If this works please tell me.
Roger, you are my hero. :)
With that PCI-e setting (again, for the record, this is on a Supermicro X7DBE motherboard,
and the BIOS setting is PCIe I/O performance, which has two states: Coalesce and Payload 256B)
all of the four machines have survived a half day of continous bashing. Previously one, or two
machines typically fell off after such amount of IO load, so it looks promising so far.
I hope this won't change over the time.

BTW, this is still with 2.6.21.5, because the SCSI target stuff I use (SCST) has some
-I hope temporary- problems with changed (deleted) interfaces in newer kernels.

Should the DEBUG_SHIRQ problem in e1000 affect stability (or performance)?

Thanks,

I too have a SuperMicro MB , But it is a X7DB8 . Same symptoms . Reported MCE problems here a couple of times .
I set the BIOS setting 'PCIe I/O performance', to 'Coalesce' .
For everyones information , stability went way up , scsi IO is ~ half , But if there's no stability ...

I'm going to try their 1.3b bios update & see if that helps any .
iirc , Some said they'd already acquired the lastest for their MB & that did not help them at all . What th eheck I'll give it a try anyway .
Hth , JimL
--
+-----------------------------------------------------------------+
| James W. Laferriere | System Techniques | Give me VMS |
| Network Engineer | 663 Beaumont Blvd | Give me Linux |
| babydr@xxxxxxxxxxxxxxxx | Pacifica, CA. 94044 | only on AXP |
+-----------------------------------------------------------------+
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/