Bug 187459

Summary:	i82860_edac status messages fill kernel ring buffer
Product:	[Fedora] Fedora	Reporter:	Steve Snyder <swsnyder>
Component:	kernel	Assignee:	Dave Jones <davej>
Status:	CLOSED ERRATA	QA Contact:	Brian Brock <bbrock>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	4	CC:	karl, pfrields, wtogami
Target Milestone:	---
Target Release:	---
Hardware:	i686
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2006-05-29 03:40:20 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Steve Snyder 2006-03-31 02:51:10 UTC

Description of problem:

After only a few minutes runtime, the new i82860_edac driver has filled the 
kernel's ring buffer.  Running dmesg now shows nothing but a series of these 
messages:

  MC0: drivers/edac/i82860_edac.c: i82860_check()

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

kernel-smp-2.6.16-1.2069_FC4

How reproducible:

Always.

Steps to Reproduce:
1. Install kernel-smp-2.6.16-1.2069_FC4 into i860-based system
2. Reboot
3. Run dmesg a few minutes after rebooting
  
Actual results:

An unending series of status messages from the i82860_edac driver

Expected results:

Driver should report errors, not generate constant output

Additional info:

No entries in /var/log/messages suggest this constant output.

Comment 1 Michael Carney 2006-03-31 20:00:17 UTC

Turns out the problem is with the edac_mc module, not i82860_edac. edac_mc is 
compiled with edac_debug_level set to 1, not 0, which is why the messages are 
generated. 
 
The fix: .../drivers/edac/edac_mc.c: 
*** edac_mc.c   2006-03-19 21:53:29.000000000 -0800 
--- edac_mc.c.new       2006-03-31 12:01:06.000000000 -0800 
*************** 
*** 46,52 **** 
 
  #ifdef CONFIG_EDAC_DEBUG 
  /* Values of 0 to 4 will generate output */ 
! int edac_debug_level = 1; 
  EXPORT_SYMBOL(edac_debug_level); 
  #endif 
 
--- 46,52 ---- 
 
  #ifdef CONFIG_EDAC_DEBUG 
  /* Values of 0 to 4 will generate output */ 
! int edac_debug_level = 0; 
  EXPORT_SYMBOL(edac_debug_level); 
  #endif 
 
 
Workaround: 
 
Unload i82860_edac and edac_mc, reload edac_mc setting edac_debug_level to 0: 
rmmod i82860_edac 
rmmod edac_mc 
modprobe edac_mc edac_debug_level=0

Comment 2 Dave Jones 2006-03-31 21:58:43 UTC

EDAC_DEBUG was supposed to be disabled. I turned it off in CVS yesterday.

Comment 3 David Timms 2006-04-03 11:48:37 UTC

? duplicate 187710

Comment 4 Jarod Wilson 2006-04-04 18:41:54 UTC

*** Bug 187710 has been marked as a duplicate of this bug. ***