Bug 239244

Summary:	attempt to use kdump just freezes the box
Product:	[Fedora] Fedora	Reporter:	Oleg Drokin <green>
Component:	kernel	Assignee:	Kernel Maintainer List <kernel-maint>
Status:	CLOSED INSUFFICIENT_DATA	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	rawhide	CC:	itamar, kernel-maint, qcai, triage
Target Milestone:	---
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:	bzcl34nup
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:
Clones:	513800 (view as bug list)		Environment:
Last Closed:	2008-05-07 01:41:28 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 Oleg Drokin 2007-05-06 20:50:54 UTC

Description of problem:
After getting some kernel problems, I finally decided to give kdump a try, but
to my surprise, it does not work.
Any attempt to use kdump (with sysrq-c or echo c >/proc/sysrq-trigger) leads to
instant system crash. sysrq does not work anymore at this point and the only
solution is hard poweroff.
I see that FC7 does not ship kernel-kdump package anymore, but since FC7 kernel
is built with CONFIG_RELOCATABLE, it should be fine as kdump kernel I presume.

Version-Release number of selected component (if applicable):
kernel-2.6.21-1.3116.fc7

How reproducible:
100% reproducible.

Steps to Reproduce:
boot kernel with crashkernel=128M@16M option
run service kdump start
run sysctl kernel.sysrq=1
press sysrq-t or echo c >/proc/sysrq-trigger

Additional info:
The system is DELL Latitude D620 laptop with Intel Core2 Duo T7200 CPU, 2G RAM,
i686 arch.
Latest FC7 stuff from development repo.

Comment 1 Oleg Drokin 2007-05-14 19:24:47 UTC

I upgraded to 2.6.21-1.3142.fc7 and the problem is still present.

Comment 2 Bug Zapper 2008-04-04 00:33:50 UTC

Based on the date this bug was created, it appears to have been reported
against rawhide during the development of a Fedora release that is no
longer maintained. In order to refocus our efforts as a project we are
flagging all of the open bugs for releases which are no longer
maintained. If this bug remains in NEEDINFO thirty (30) days from now,
we will automatically close it.

If you can reproduce this bug in a maintained Fedora version (7, 8, or
rawhide), please change this bug to the respective version and change
the status to ASSIGNED. (If you're unable to change the bug's version
or status, add a comment to the bug and someone will change it for you.)

Thanks for your help, and we apologize again that we haven't handled
these issues to this point.

The process we're following is outlined here:
http://fedoraproject.org/wiki/BugZappers/F9CleanUp

We will be following the process here:
http://fedoraproject.org/wiki/BugZappers/HouseKeeping to ensure this
doesn't happen again.

Comment 3 Bug Zapper 2008-05-07 01:41:26 UTC

This bug has been in NEEDINFO for more than 30 days since feedback was
first requested. As a result we are closing it.

If you can reproduce this bug in the future against a maintained Fedora
version please feel free to reopen it against that version.

The process we're following is outlined here:
http://fedoraproject.org/wiki/BugZappers/F9CleanUp

Comment 4 Matt Castelein 2009-07-24 23:47:31 UTC

I have encountered this problem on Fedora 11.  I am following the instructions at:
 https://fedoraproject.org/wiki/Kernel/kdump.. When I get to the point where I do "echo c > /proc/sysrq-trigger"  the box just freezes and no dump kernel is loaded.  It just sits there until I reset it.

Comment 5 Matt Castelein 2009-07-26 00:35:50 UTC

Reopened as bug 513800