Bug 688445

Summary:	kdump don't works on POWER7 with echo 3 > /proc/crasher
Product:	Red Hat Enterprise Linux 6	Reporter:	Chao Ye <cye>
Component:	kexec-tools	Assignee:	Cong Wang <amwang>
Status:	CLOSED NOTABUG	QA Contact:	Kernel Dump QE <kernel-dump-qe>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	6.1	CC:	czhang, phan, rkhan
Target Milestone:	rc
Target Release:	---
Hardware:	ppc64
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2011-03-17 05:10:43 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:

Description Chao Ye 2011-03-17 04:25:23 UTC

Description of problem:
When trigger crash with echo 3 > /proc/crasher, system got freeze. Both console and ssh freeze, no output and no response.

Version-Release number of selected component (if applicable):
kernel-2.6.32-124.el6
kexec-tools-2.0.0-169.el6

How reproducible:
100% on POWER7

Steps to Reproduce:
1.Install RHEL6.1-20110311.3
2.Upgrade to latest kernel/kexec-tools
3.Build crasher.ko(fetch source via yum install -y rh-tests-kernel-kdump-crash-crasher)
4.echo 3 > /proc/crasher

Actual results:
System freezed

Expected results:
vmcore saved

Additional info:
I tested with echo 0/1/2 > /proc/crasher, all of them works fine.
System reserved: ibm-p750e-02-lp3.rhts.eng.bos.redhat.com