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Bug 1692225

Summary: RHEL6 guest didn't Synchronize in destination after postcopy migration
Product: Red Hat Enterprise Linux 8 Reporter: jingzhao <jinzhao>
Component: qemu-kvmAssignee: Dr. David Alan Gilbert <dgilbert>
Status: CLOSED DUPLICATE QA Contact: Virtualization Bugs <virt-bugs>
Severity: medium Docs Contact:
Priority: medium    
Version: 8.0CC: chayang, juzhang, rbalakri, virt-maint, xiaohli, yuhuang
Target Milestone: rc   
Target Release: 8.0   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2019-09-19 11:23:13 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:

Description jingzhao 2019-03-25 05:09:41 UTC 
Description of problem:
RHEL6 guest didn't Synchronize in destination after postcopy migration

Version-Release number of selected component (if applicable):
source host and destination host are both rhel8 host

qemu-kvm-2.12.0-63.module+el8+2833+c7d6d092.x86_64
kernel-4.18.0-80.el8.x86_64

How reproducible:
2/2

Steps to Reproduce:
1. Boot guest with qemu command line[1] at source host
   Boot guest with qemu command line[1] with "-incoming tcp:0:5800"

2. In source host:
(qemu) migrate_set_capability postcopy-ram on
(qemu) migrate -d tcp: destination Ip:5800
(qemu) migrate_start_postcopy 

3. check guest in the destination host

Actual results:
Guest didn't start running immediately 

Expected results:
Guest start running immediately

Additional info:
[1]
/usr/libexec/qemu-kvm -name rhel6.10 \
-M pc \
-cpu SandyBridge -m 4G \
-smp 4,sockets=1,cores=4,threads=1 \
-device virtio-scsi-pci,id=virtio_scsi_pci0 \
-drive id=drive_image1,if=none,snapshot=off,aio=threads,cache=none,format=qcow2,file=/mnt/rhel610-64-virtio-scsi.qcow2 \
-device scsi-hd,drive=drive_image1,id=image1,bus=virtio_scsi_pci0.0 \
-vnc :2 \
-vga qxl \
-monitor stdio \
-netdev tap,id=hostnet0,vhost=on \
-device virtio-net-pci,netdev=hostnet0,id=net0,mac=18:66:da:5f:d1:02 \
Comment 1 jingzhao 2019-03-25 05:10:10 UTC 
Note: didn't reproduce it with RHEL8 guest
Comment 2 Dr. David Alan Gilbert 2019-09-19 11:23:13 UTC 
Same as bz 1691721;   the patch that broke it was backported into rhel8 2.12 by bz 1712946
The fix is a spice-server fix.

*** This bug has been marked as a duplicate of bug 1691721 ***