Red Hat Bugzilla – Bug 484104
[LTC 5.4 FEAT] EDAC Support for IBM x3850/x3950/x3850 M2/x3950 M2
Last modified: 2013-07-04 18:53:05 EDT
Emily J. Ratliff <email@example.com> -
1. Feature Overview:
Feature Id: 
a. Name of Feature: EDAC Support
b. Feature Description
RAS Enhancements Require EDAC support for all chipsets in IBM systems (including proprietary).
Also would prefer the ability to disable EDAC drivers during install for platforms that don't
require them. The majority of IBM Intel and AMD based servers do memory and CPU predictive
failure analysis (PFA) in the BIOS with the help of the BMC. When EDAC drivers are loaded they will
poll for memory errors once a second. The EDAC drivers may read the same hardware status registers
that the BIOS is using for PFA. This can easily lead to interference between EDAC and the BIOS if
EDAC reads and clears the registers before the BIOS gets a chance to do so and can potentially
render the BIOS's PFA mechanism dysfunctional. Therefore, a mechanism (black/white listing or
perhaps something more robust) for disabling EDAC on platforms that already do PFA in firmware would
2. Feature Details:
Arch Specificity: Both
Affects Installer: Yes
Affects Kernel Modules: Yes
Delivery Mechanism: Request Red Hat development assistance
Request Type: Kernel - Enhancement from Upstream
d. Upstream Acceptance: In Progress
Sponsor Priority 1
f. Severity: High
IBM Confidential: no
Code Contribution: IBM code
g. Component Version Target: The EDAC code for some IBM chipsets has been started. The target at
this point is probably 2.6.27. Additionally, there are components to this feature request that
require code from the distros (ability to disable/enable EDAC based on the platform type).
3. Business Case
Need to provide a mechanism for customers to be able to detect and report platform errors from Linux.
4. Primary contact at Red Hat:
5. Primary contacts at Partner:
Project Management Contact:
Monte Knutson, firstname.lastname@example.org, 877-894-1495
Kevin Stansell, email@example.com
Chris McDermott, firstname.lastname@example.org
Deneen T. Dock, email@example.com
Updating PM score.
Could you please define better what chipsets are you referring? We should coordinate the EDAC efforts with others already started. for example, the bug #482874 is about the support for IBM x3850/3950.
There are other EDAC feature request bz#s also opened.
(In reply to comment #5)
> Could you please define better what chipsets are you referring? We should
> coordinate the EDAC efforts with others already started. for example, the bug
> #482874 is about the support for IBM x3850/3950.
> There are other EDAC feature request bz#s also opened.
I apologize for the delay. Didn't see your question in my inbox until just now. The chipsets we are referring to are those included in the x3850/x3950/x3850 M2/x3950 M2. This is the EXA4 chipset, a memory/scalability controller for these High End servers. Currently, there is no EDAC driver upstream for this chipset, however one is under development.
Closing as WONTFIX for RHEL 5.4 due to lack of capacity, please feel free to
------- Comment From firstname.lastname@example.org 2011-02-21 05:16 EDT-------
***Closing as part of clean up activity*******
Redhat as closed this bug as WONT FIX.