Bug 1288096

Summary:	qemu quit when rebooting guest which hotplug memory >=13 times
Product:	Red Hat Enterprise Linux 7	Reporter:	Jan Kurik <jkurik>
Component:	qemu-kvm-rhev	Assignee:	Igor Mammedov <imammedo>
Status:	CLOSED ERRATA	QA Contact:	Virtualization Bugs <virt-bugs>
Severity:	urgent	Docs Contact:
Priority:	high
Version:	7.2	CC:	ailan, chayang, dyuan, hhuang, imammedo, juzhang, lhuang, lmiksik, michen, pezhang, qzhang, sherold, snagar, virt-maint, xfu
Target Milestone:	rc	Keywords:	ZStream
Target Release:	---
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:	qemu-kvm-rhev-2.3.0-31.el7_2.5	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:	1245864	Environment:
Last Closed:	2016-01-28 16:01:51 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:
Bug Depends On:	1245864
Bug Blocks:

Description Jan Kurik 2015-12-03 13:58:08 UTC

This bug has been copied from bug #1245864 and has been proposed
to be backported to 7.2 z-stream (EUS).

Comment 3 Miroslav Rezanina 2015-12-10 08:37:40 UTC

Fix included in qemu-kvm-rhev-2.3.0-31.el7_2.5

Comment 4 Pei Zhang 2015-12-15 02:58:03 UTC

Summary: After testing with the latest versions, the results below can prove that this bug has been fixed well.

Versions:
Host:
Kernel:3.10.0-334.el7.x86_64
qemu-kvm-rhev:qemu-kvm-rhev-2.3.0-31.el7_2.5.x86_64
Guest:
Kernel:3.10.0-334.el7.x86_64

Steps:
1. Boot guest.
</usr/libexec/qemu-kvm command> \
-m 1G,slots=256,maxmem=40G -numa node \
-monitor unix:/tmp/socket,server,nowait 

2. Hotplug 10M memory 13 times using below script.
#!/bin/bash
i=0 
num=13
#num=256
while [ $i -lt $num ] 
do 
echo $i
sleep 3 
echo "object_add memory-backend-ram,id=mem$i,size=10M"|nc -U /tmp/socket 
sleep 2
echo "device_add pc-dimm,id=dimm$i,memdev=mem$i,slot=$i"|nc -U /tmp/socket 
i=$(($i+1)) 
done 

3. Reboot guest several times.
# reboot

4. Check status of qemu. Qemu keeps working.
# echo "info version" |nc -U /tmp/socket
QEMU 2.3.0 monitor - type 'help' for more information
(qemu) info version
2.3.0 (qemu-kvm-rhev-2.3.0-31.el7_2.5)

5. Also tested 'hotplug 256 times' with same steps 1~4. Qemu also keeps working.

So this bug has been fixed well.

Comment 9 errata-xmlrpc 2016-01-28 16:01:51 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHSA-2016-0084.html