Bug 693392

Summary:	x86: mce: don't print "human readable" messages for corrected errors
Product:	Red Hat Enterprise Linux 6	Reporter:	Robert Binkhorst <rbinkhor>
Component:	kernel	Assignee:	Prarit Bhargava <prarit>
Status:	CLOSED DUPLICATE	QA Contact:	Red Hat Kernel QE team <kernel-qe>
Severity:	low	Docs Contact:
Priority:	low
Version:	6.1	CC:	arozansk, emcnabb
Target Milestone:	rc
Target Release:	---
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2011-04-09 14:24:11 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Bug Depends On:
Bug Blocks:	658636, 697582

Description Robert Binkhorst 2011-04-04 14:37:55 UTC

Description of problem:

On the x86 platform when there is a corrected MCE error it prints the following messages:
Mar 29 17:52:19 server1 kernel: [Hardware Error]: No human readable MCE decoding support on this CPU type.
Mar 29 17:52:19 server1 kernel: [Hardware Error]: Run the message through 'mcelog --ascii' to decode.

It should however only print them in case of a panic as per the upstream commit:

--------
The "human readable" message is not useful for corrected
errors. There's no reason to run mcelog --ascii and the
error is logged anyways. And it's pr_emerg, which is not
needed for a corrected error.

Only print it during panic.
--------

These messages are confusing to the less experienced admin.

Version-Release number of selected component (if applicable):
RHEL-6.1 beta

How reproducible:
On a system installed with RHEL-6.1 beta with correctable MCE errors you will see these messages.

Steps to Reproduce:
1. Install a machine with RHEL-6.1 beta
2. Wait for MCE errors to be corrected
3.
  
Actual results:
The system logs superfluous messages

Expected results:
These messages should only be printed in case of a panic.

Additional info:
Upstream commit that resolves this:
http://git.kernel.org/?p=linux/kernel/git/ak/linux-mce-2.6.git;a=commitdiff;h=6e3c7411d2b86bff210c59caa432e8e862037bfd

Comment 2 RHEL Program Management 2011-04-09 14:19:31 UTC

This request was evaluated by Red Hat Product Management for inclusion
in a Red Hat Enterprise Linux maintenance release. Product Management has 
requested further review of this request by Red Hat Engineering, for potential
inclusion in a Red Hat Enterprise Linux Update release for currently deployed 
products. This request is not yet committed for inclusion in an Update release.

Comment 3 Prarit Bhargava 2011-04-09 14:24:11 UTC


*** This bug has been marked as a duplicate of bug 688281 ***