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Bug 1638077 - Cross migration from RHEL7.5 to RHEL7.6 fails with cpu flag stibp [rhel-7.6.z]
Summary: Cross migration from RHEL7.5 to RHEL7.6 fails with cpu flag stibp [rhel-7.6.z]
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: qemu-kvm-rhev
Version: 7.6
Hardware: x86_64
OS: Linux
urgent
urgent
Target Milestone: rc
: ---
Assignee: Eduardo Habkost
QA Contact: jingzhao
URL:
Whiteboard:
Depends On: 1633150
Blocks:
TreeView+ depends on / blocked
 
Reported: 2018-10-10 15:29 UTC by Oneata Mircea Teodor
Modified: 2018-11-08 03:23 UTC (History)
20 users (show)

Fixed In Version: qemu-kvm-rhev-2.12.0-18.el7_6.1
Doc Type: Bug Fix
Doc Text:
Previously, migrating virtual machines (VMs) from a Red Hat Enterprise Linux 7.5 host with a single-thread indirect branch predictors (STIBP) flag set in some cases failed. This update ensures that the flag is consistently added to VMs with an AMD64 or Intel 64 virtual CPU (vCPU), which prevents the described problem from occurring.
Clone Of: 1633150
Environment:
Last Closed: 2018-11-01 11:33:04 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2018:3444 0 None None None 2018-11-01 11:33:16 UTC

Description Oneata Mircea Teodor 2018-10-10 15:29:06 UTC 
This bug has been copied from bug #1633150 and has been proposed to be backported to 7.6 z-stream (EUS).
Comment 4 jingzhao 2018-10-16 06:15:30 UTC 
Reproduce it with qemu-kvm-rhev-2.12.0-18.el7.x86_64

and verify it with qemu-kvm-rhev-2.12.0-18.el7_6.1.x86_64

migrate successfully from 7.5 host to 7.6 host with stibp=on

qemu line:
/usr/libexec/qemu-kvm \
-machine pc-i440fx-rhel7.5.0,accel=kvm,usb=off \
-cpu IvyBridge,ss=on,pcid=on,hypervisor=on,arat=on,tsc_adjust=on,stibp=on,ssbd=on,xsaveopt=on \
-nodefaults -rtc base=utc \
-m 4G \
-smp 4,sockets=4,cores=1,threads=1 \
-enable-kvm \
-uuid 990ea161-6b67-47b2-b803-19fb01d30d12 \
-k en-us \
-nodefaults \
-chardev file,path=/home/seabios.log,id=seabios -device isa-debugcon,chardev=seabios,iobase=0x402 \
-boot menu=on \
-qmp tcp:0:6667,server,nowait \
-usb \
-device usb-tablet \
-vga qxl \
-drive file=/mnt/rhel76-64-virtio-scsi.qcow2,if=none,id=drive-virtio-disk0,format=qcow2,cache=none,werror=stop,rerror=stop \
-device virtio-blk-pci,drive=drive-virtio-disk0,id=virtio-disk0 \
-device virtio-net-pci,netdev=tap10,mac=00:52:68:26:31:03,id=net0 -netdev tap,id=tap10 \
-vnc :1 \
-spice port=5910,addr=0.0.0.0,disable-ticketing,seamless-migration=on \
-monitor stdio \
-incoming tcp:0:5800


according to above result. change to verify
Comment 6 errata-xmlrpc 2018-11-01 11:33:04 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://access.redhat.com/errata/RHBA-2018:3444
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