Bug 702290

Summary:	Guest cannot reboot after doing kdump
Product:	Red Hat Enterprise Linux 6	Reporter:	Mike Cao <bcao>
Component:	kernel	Assignee:	Gleb Natapov <gleb>
Status:	CLOSED DUPLICATE	QA Contact:	Virtualization Bugs <virt-bugs>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	6.1	CC:	bcao, ddutile, juzhang, knoel, michen, tburke
Target Milestone:	rc
Target Release:	---
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2011-06-15 14:06:28 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:

Description Mike Cao 2011-05-05 09:56:27 UTC

Description of problem:


Version-Release number of selected component (if applicable):
host info:
# uname -r
2.6.32-131.0.10.el6.x86_64
# rpm -q qemu-kvm
qemu-kvm-0.12.1.2-2.160.el6.x86_64

Guest info :
kernel2.6.18-259.el5

How reproducible:
sometimes 

Steps to Reproduce:
1.start RHEL5u7 x86_64 guest
CLI:
/usr/libexec/qemu-kvm -M rhel6.1.0 -enable-kvm -m 3G -smp 2,sockets=1,cores=2,threads=1 -name rhel5u6_64 -uuid c6b7e971-5550-4c6d-a47f-5fd95feea1a2 -rtc base=utc,clock=host,driftfix=slew -boot c -drive file=/home/virtio_serial/rhel5.7.qcow2,if=none,id=drive-virtio-disk0,format=qcow2,cache=none,aio=native,werror=stop,rerror=stop -device virtio-blk-pci,bus=pci.0,addr=0x5,drive=drive-virtio-disk0,id=virtio-disk0 -netdev tap,id=hostnet0,vhost=on -device virtio-net-pci,netdev=hostnet0,id=net0,mac=52:54:00:0a:6a:69,bus=pci.0,addr=0x3 -chardev pty,id=charserial0 -device isa-serial,chardev=charserial0,id=serial0 -usb -device usb-tablet,id=input0 -vnc :6 -vga cirrus -device intel-hda,id=sound0,bus=pci.0,addr=0x4 -device hda-duplex,id=sound0-codec0,bus=sound0.0,cad=0 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x6 -monitor stdio -device virtio-serial-pci,id=virtio-serial0,max_ports=16,bus=pci.0,addr=0x8 -chardev socket,id=s1,path=/tmp/tt1,server,nowait -device virtserialport,chardev=s1,name=org.linux-kvm.port.0,bus=virtio-serial0.0,id=port0
2.echo c >/proc/sysrq-trigger

  
Actual results:
Guest could not generate crashdump,and will not reboot automately.

Expected results:
Guest generates crashdump,after that reboot automately.

Additional info:
1.kdump service is running
2.in the guest # cat /proc/cmdline 
ro root=/dev/VolGroup00/LogVol00 rhgb quiet crashkernel=128M@16M

Comment 1 Don Dutile (Red Hat) 2011-06-08 04:37:13 UTC

Is this a valid kdump setup? 
does changing the setting to 256M@32M work?

Comment 2 Mike Cao 2011-06-08 06:34:54 UTC

(In reply to comment #1)
> Is this a valid kdump setup? 
yes ,it is .

> does changing the setting to 256M@32M work?
still can reproduced .
As I said in comment #0 ,this issue does not 100% happened .

Additional info
re-tested on 
# uname -r
2.6.32-131.0.15.el6.x86_64
[root@dhcp-8-156 ~]# rpm -q qemu-kvm
qemu-kvm-0.12.1.2-2.160.el6.x86_64

Comment 3 Gleb Natapov 2011-06-15 14:06:28 UTC

Please check for existing bugs before opening new one.

*** This bug has been marked as a duplicate of bug 611407 ***