Problem in Ubuntu server 12.04 64bit
 

hi everione.

I have a problema on my server using ubuntu 12.04
The hardware is a DELL Poweredge R420 after few days I see that message and the server down performance always.
Need to know how to fix this

20793.149770] CPU4: Package power limit notification (total events =
[20793.149776] CPU3: Package power limit notification (total events =
[20793.149778] CPU2: Package power limit notification (total events =
[20793.149786] CPU7: Package power limit notification (total events =
[20793.149788] CPU6: Package power limit notification (total events =

Hi,

you say that after a few days the issue started, so did you upgrade some package/s recently? it looks like a kernel regression that was happening to > 3.5/3.6 kernels, so was the kernel upgraded?

also, it would be nice if you can provide us with more information about your hardware (lspci?).

Hi and thanks for the answer. So I found a solution on that link with DELL comunity.

http://en.community.dell.com/techcen...e-servers.aspx

Thanks again and best regards from Brazil.


Wilson

Hi waypc,

I would love to know what you did exactly, because that link suggest upgrading to ubuntu 12.10 and I am still seeing the the same errors there.

Hi you need do this... I do and help me a lot...

The acpi_pad and mei drivers must also be blacklisted as they can cause performance problems on Dell PowerEdge servers. The acpi_pad driver is the ACPI Processor Aggregator driver, used for power saving features. However it can interfere with the firmware if power saving features enabled in BIOS. The acpi_pad driver is still undergoing development and may be best to blacklist the driver at this time, it is not a necessary driver for system operation.

The mei driver can cause error messages with watchdog timer and also prevent proper shutdown.

To blacklist a driver, you can either edit /etc/modprobe.d/blacklist.conf or create your own /etc/blacklist/xxxx.conf file and add the lines:

blacklist acpi_pad

blacklist mei

blacklist sb_edac

blacklist i7core_edac

Solution
 

Hi you need do this... I do and help me a lot...

The acpi_pad and mei drivers must also be blacklisted as they can cause performance problems on Dell PowerEdge servers. The acpi_pad driver is the ACPI Processor Aggregator driver, used for power saving features. However it can interfere with the firmware if power saving features enabled in BIOS. The acpi_pad driver is still undergoing development and may be best to blacklist the driver at this time, it is not a necessary driver for system operation.

The mei driver can cause error messages with watchdog timer and also prevent proper shutdown.

To blacklist a driver, you can either edit /etc/modprobe.d/blacklist.conf or create your own /etc/blacklist/xxxx.conf file and add the lines:

blacklist acpi_pad

blacklist mei

blacklist sb_edac

blacklist i7core_edac

The link at the top of that page says there is no longer any need to do that:
"My colleague Jordan Hargrave previously blogged about issues with the acpi_pad, sb_edac, i7core_edac, and mei drivers in the kernel used by Ubuntu 12.04. The acpi_pad, sb_edac and i7core_edac issues are now resolved in stable release update (SRU) kernels for Ubuntu"

I guess it doesn't hurt to try.

Yes you right to do this. so If you can contact me on skype chat my nickname is waypcsuportedelivery and there we can talk more about Linux and talk to solutions.


Wilson

Hi Wilson,
I blacklisted "sb_edac" and "i7core_edac" (I left in the other two) and the errors indeed went away. Thanks for your help!
I'm not knowledgable enough to assess if leaving out these modules adversely affects operation in any way, but so far so good.
Cheers!
-j

Update: From another thread I learned that blacklisting those modules could have side effects and that adding "clearcpuid=229" as a kernel parameter is a better solution.