Bug 180958

Summary:	[RHEL4] MCE arg parsing broken on x86-64
Product:	Red Hat Enterprise Linux 4	Reporter:	Jim Paradis <jparadis>
Component:	kernel	Assignee:	Jim Paradis <jparadis>
Status:	CLOSED ERRATA	QA Contact:	Brian Brock <bbrock>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	4.0	CC:	jbaron, lwang, peterm
Target Milestone:	---
Target Release:	---
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:	RHSA-2006-0575	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2006-08-10 22:15:23 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:
Bug Depends On:
Bug Blocks:	181409

Description Jim Paradis 2006-02-10 19:53:37 UTC

This is the RHEL4 version of Bug 171277:

In arch/x86-64/kernel/mce.c:

__setup("mce", mcheck_enable);

The comment above mcheck_enable reads:

/* mce=off disables machine check. Note you can reenable it later
   using sysfs */

The '=' passed to mcheck_enable is not taken into account, and parsing will fail
every time.

Trivial fix.

Comment 1 Jim Paradis 2006-03-01 23:00:14 UTC

fix posted to rhkernel-list

Comment 2 Jason Baron 2006-05-09 17:58:33 UTC

committed in stream U4 build 34.10. A test kernel with this patch is available
from http://people.redhat.com/~jbaron/rhel4/

Comment 3 Jason Baron 2006-05-12 19:44:49 UTC

*** Bug 191141 has been marked as a duplicate of this bug. ***

Comment 5 Mike Gahagan 2006-06-14 18:21:16 UTC

verified this is working on -39.EL. apperantly the only way to check is look for
the (non)existance of the bank* files in
/sys/devices/system/machinecheck/machinecheck0.

Comment 7 Red Hat Bugzilla 2006-08-10 22:15:30 UTC

An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHSA-2006-0575.html