Bug 681987

Summary: crash module required for RT kernel
Product: Red Hat Enterprise MRG Reporter: Guy Streeter <streeter>
Component: realtime-kernelAssignee: Luis Claudio R. Goncalves <lgoncalv>
Status: CLOSED ERRATA QA Contact: Jiri Kastner <jkastner>
Severity: medium Docs Contact:
Priority: high    
Version: 1.3CC: bhu, jkastner, jwest, lgoncalv, nobody, pamadio, williams
Target Milestone: 2.0.8   
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Cause: The realtime kernel has CONFIG_STRICT_DEVMEM set Consequence: The crash tool cannot run on a live system Fix: use the crash kernel module, as used in RHEL and Fedora. Result: crash now runs on a live system.
Story Points: ---
Clone Of: Environment:
Last Closed: 2011-09-12 19:47:04 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:
Attachments:
Description Flags
Current crash module
none
Makefile for crash module none

Description Guy Streeter 2011-03-03 19:23:22 UTC
Because the RT kernel sets CONFIG_STRICT_DEVMEM, the crash program cannot run on a live system. The crash module (used in RHEL and Fedora) solves this problem.
The crash module source is available in the upstream crash program source tar-ball.

Comment 1 Clark Williams 2011-03-03 19:28:50 UTC
Created attachment 482138 [details]
Current crash module

This is the crash module from crash-5.1.2

Comment 2 Clark Williams 2011-03-03 19:29:59 UTC
Created attachment 482139 [details]
Makefile for crash module

The included Makefile for the crash module

Comment 3 John Kacur 2011-03-28 20:36:18 UTC
Where is the upstream source for this? If I am to really use the 1.1 version, then there are some other files that need to be modified too.
Thanks

Comment 4 Guy Streeter 2011-03-28 21:56:14 UTC
It is included in the upstream crash program source available at
http://people.redhat.com/anderson
The changelog comment at
http://people.redhat.com/anderson/crash.changelog#5_1_2
explains how to build and use it.

Comment 11 Luis Claudio R. Goncalves 2011-08-29 13:46:51 UTC
    Technical note added. If any revisions are required, please edit the "Technical Notes" field
    accordingly. All revisions will be proofread by the Engineering Content Services team.
    
    New Contents:
Cause: The realtime kernel has CONFIG_STRICT_DEVMEM set
Consequence: The crash tool cannot run on a live system
Fix: use the crash kernel module, as used in RHEL and Fedora.
Result: crash now runs on a live system.

Comment 12 errata-xmlrpc 2011-09-12 19:47:04 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 therefore 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-2011-1253.html