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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-toolsAssignee: Cong Wang <amwang>
Status: CLOSED NOTABUG QA Contact: Kernel Dump QE <kernel-dump-qe>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 6.1CC: 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:
Embargoed:

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