Bug 1254855

Summary:	Reboot fail after NIC hot-unplug inside win10 guest
Product:	Red Hat Enterprise Linux 7	Reporter:	weliao <weliao>
Component:	qemu-kvm	Assignee:	Yvugenfi <yvugenfi>
Status:	CLOSED CURRENTRELEASE	QA Contact:	Virtualization Bugs <virt-bugs>
Severity:	high	Docs Contact:
Priority:	medium
Version:	7.2	CC:	huding, juzhang, knoel, michen, rbalakri, virt-maint, weliao, xfu, ybendito
Target Milestone:	rc
Target Release:	---
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2017-01-11 07:26:15 UTC	Type:	Bug
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:
Bug Blocks:	1288337

Description weliao 2015-08-19 05:46:51 UTC

Description of problem:
Test with windows 10 guest, after NIC hot-unplug from host, reboot guest,boot failed.

Version-Release number of selected component (if applicable):
qemu-kvm-1.5.3-101.el7.x86_64
3.10.0-305.el7.x86_64

How reproducible:
100%

Steps to Reproduce:
1.NIC hot-unplug from host
(qemu) device_del net0
(qemu) netdev_del hostnet0
2.Reboot guest

Actual results:
boot fail as attachment

Expected results:
boot success

Additional info:
/usr/libexec/qemu-kvm -name win10qcow2 -M pc-i440fx-rhel7.0.0 -cpu SandyBridge -m 4096 -realtime mlock=off -smp 4 \
-device virtio-scsi-pci,id=scsi2,indirect_desc=off,event_idx=off,bus=pci.0 \
-drive file=/mnt/win10.qcow2,if=none,id=drive-scsi-disk0,format=qcow2 \
-device scsi-hd,bus=scsi2.0,drive=drive-scsi-disk0,id=scsi-disk0,bootindex=1 \
-netdev tap,id=hostnet0  -\
device virtio-net-pci,netdev=hostnet0,id=net0,mac=52:88:66:77:88:66,bus=pci.0,addr=0x3 \
-device qxl-vga,id=video0,ram_size=67108864,vram_size=67108864,vgamem_mb=16,bus=pci.0,addr=0x5 -spice port=6800,disable-ticketing, -monitor stdio -qmp tcp:0:4444,server,nowait

Comment 1 weliao 2015-08-19 05:50:30 UTC

guest img:
http://fileshare.englab.nay.redhat.com/pub/section2/images_backup/rhel7/bug1254855/win10.qcow2
boot fail 
Screenshot:
http://fileshare.englab.nay.redhat.com/pub/section2/images_backup/rhel7/bug1254855/1.png

Comment 3 weliao 2015-08-19 09:44:41 UTC

Test in qemu-img-rhev-2.3.0-18.el7.x86_64 , no this issue

Comment 7 ybendito 2016-12-14 18:13:40 UTC

Please check whether the same problem happens if used rtl8139 instead of virtio-net-pci

Comment 8 weliao 2016-12-15 07:43:41 UTC

retest with qemu-kvm-1.5.3-126.el7.x86_64 ,used rtl8139 and virtio-net-pci, all can not reproduced this issue.

seems the result is good.

Comment 10 weliao 2017-01-11 07:26:15 UTC

Please be free to reopen it if there is anything wrong.