Bug 1375524
| Summary: | Failed to migrate guest back to rhel7.2 on host which support 'arat' with host-model | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 7 | Reporter: | chhu |
| Component: | libvirt | Assignee: | Jiri Denemark <jdenemar> |
| Status: | CLOSED ERRATA | QA Contact: | Jing Qi <jinqi> |
| Severity: | medium | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 7.3 | CC: | dyuan, fjin, lhuang, rbalakri, xuzhang, yalzhang, zpeng |
| Target Milestone: | rc | ||
| Target Release: | --- | ||
| Hardware: | x86_64 | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | libvirt-2.5.0-1.el7 | Doc Type: | If docs needed, set a value |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2017-08-01 17:14:13 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: | |||
| Bug Depends On: | |||
| Bug Blocks: | 1199452 | ||
Migrate a guest from rhel7.2 to rhel7.3 on host:Skylake-Client, then try to migrate it back, met "error: internal error: Unknown CPU model Skylake-Client". This should be fixed upstream as of
commit 7ce711a30eaf882ccd0217b2528362b563b6d670
Refs: v2.2.0-199-g7ce711a
Author: Jiri Denemark <jdenemar>
AuthorDate: Wed Jun 22 15:53:48 2016 +0200
Commit: Jiri Denemark <jdenemar>
CommitDate: Thu Sep 22 15:40:09 2016 +0200
qemu: Update guest CPU def in live XML
Storing the updated CPU definition in the live domain definition saves
us from having to update it over and over when we need it. Not to
mention that we will soon further update the CPU definition according to
QEMU once it's started.
A highly wanted side effect of this patch, libvirt will pass all CPU
features explicitly specified in domain XML to QEMU, even those that are
already included in the host model.
This patch should fix the following bugs:
https://bugzilla.redhat.com/show_bug.cgi?id=1207095
https://bugzilla.redhat.com/show_bug.cgi?id=1339680
https://bugzilla.redhat.com/show_bug.cgi?id=1371039
https://bugzilla.redhat.com/show_bug.cgi?id=1373849
https://bugzilla.redhat.com/show_bug.cgi?id=1375524
https://bugzilla.redhat.com/show_bug.cgi?id=1377913
Signed-off-by: Jiri Denemark <jdenemar>
Verified on RHEL7.3 with libvirt-2.5.0-1.el7.x86_64 & RHEL7.2 with libvirt-1.2.17-13.el7.x86_64. Started a guest VM in RHEL7.2 and migrated it RHEL7.3 , then migrated it back to RHEL7.2 , two migrations both passed and guest vm ran well after migration. 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/RHEA-2017:1846 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/RHEA-2017:1846 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/RHEA-2017:1846 |
Description of problems: Migrate a guest from rhel7.2 to rhel7.3 on host which support cpu feature 'arat', then try to migrate it back, met "error: internal error: Unknown CPU feature arat". Version-Release number of selected component (if applicable): libvirt-2.0.0-8.el7.x86_64 qemu-kvm-rhev-2.6.0-23.el7.x86_64 libvirt-1.2.17-13.el7_2.5.x86_64 qemu-kvm-rhev-2.3.0-31.el7_2.21.x86_64 How reproducible: 100% 1. Start a VM on rhel7.2 on host which support cpu feature 'arat'. # virsh dumpxml r7|grep "<cpu" -A 5 <cpu mode='host-model'> <model fallback='allow'/> </cpu> # ps -ef|grep qemu qemu 25019 1 93 01:53 ? 00:00:18 /usr/libexec/qemu-kvm -name r7... -cpu Haswell-noTSX, +abm,+pdpe1gb,+rdrand,+f16c,+osxsave,+dca,+pdcm,+xtpr,+tm2,+est,+smx,+vmx,+ds_cpl,+monitor,+dtes64,+pbe, +tm,+ht,+ss,+acpi,+ds,+vme -m 1024 2. Migrate the VM to rhel7.3 # virsh migrate r7 qemu+ssh://ipaddress/system --live --verbose Migration: [100 %] On the target host: # virsh list --all Id Name State ---------------------------------------------------- 1 r7 running # virsh dumpxml r7|grep "<cpu" -A 30 <cpu mode='host-model'> <model fallback='allow'>Haswell-noTSX</model> <vendor>Intel</vendor> <feature policy='require' name='abm'/> <feature policy='require' name='pdpe1gb'/> <feature policy='require' name='rdrand'/> <feature policy='require' name='f16c'/> <feature policy='require' name='osxsave'/> <feature policy='require' name='dca'/> <feature policy='require' name='pdcm'/> <feature policy='require' name='xtpr'/> <feature policy='require' name='tm2'/> <feature policy='require' name='est'/> <feature policy='require' name='smx'/> <feature policy='require' name='vmx'/> <feature policy='require' name='ds_cpl'/> <feature policy='require' name='monitor'/> <feature policy='require' name='dtes64'/> <feature policy='require' name='pbe'/> <feature policy='require' name='tm'/> <feature policy='require' name='ht'/> <feature policy='require' name='ss'/> <feature policy='require' name='acpi'/> <feature policy='require' name='ds'/> <feature policy='require' name='vme'/> </cpu> # ps -ef|grep qemu qemu 35934 1 2 02:00 ? 00:00:03 /usr/libexec/qemu-kvm -name guest=r7...-cpu Haswell-noTSX,+vme,+ds,+acpi,+ss,+ht,+tm,+pbe,+dtes64,+monitor, +ds_cpl,+vmx,+smx,+est,+tm2,+xtpr,+pdcm,+dca,+osxsave,+f16c,+rdrand,+pdpe1gb, +abm -m 1024 3. Tried to migrate VM back to rhel7.2 # virsh migrate r7 qemu+ssh://10.73.131.71/system --live --verbose error: internal error: Unknown CPU feature arat Check the dumpxml --migratable, there are 'arat','tsc_adjust','xsaveopt' added. # virsh dumpxml r7 --migratable <domain type='kvm'> <name>r7</name> ..... <cpu mode='host-model' match='exact'> <model fallback='allow'>Haswell-noTSX</model> <vendor>Intel</vendor> <feature policy='require' name='vme'/> <feature policy='require' name='ds'/> <feature policy='require' name='acpi'/> <feature policy='require' name='ss'/> <feature policy='require' name='ht'/> <feature policy='require' name='tm'/> <feature policy='require' name='pbe'/> <feature policy='require' name='dtes64'/> <feature policy='require' name='monitor'/> <feature policy='require' name='ds_cpl'/> <feature policy='require' name='vmx'/> <feature policy='require' name='smx'/> <feature policy='require' name='est'/> <feature policy='require' name='tm2'/> <feature policy='require' name='xtpr'/> <feature policy='require' name='pdcm'/> <feature policy='require' name='dca'/> <feature policy='require' name='osxsave'/> <feature policy='require' name='f16c'/> <feature policy='require' name='rdrand'/> <feature policy='require' name='arat'/> <feature policy='require' name='tsc_adjust'/> <feature policy='require' name='xsaveopt'/> <feature policy='require' name='pdpe1gb'/> <feature policy='require' name='abm'/> </cpu> Actual results: In step3: Failed to migrate back to rhel7.2 Expected results: In step3: Migrate back to rhel7.2 successfully. Other information: 1) Test on host which support cpu features: arat, tsc_adjust,xsaveopt, they are new features in cpu_map.xml in rhel7.3 2) New features in rhel7.3 cpu_map.xml are: tsc_adjust, cmt, clflushopt, xsaveopt, arat, xsavec,xgetbv1, xsaves, mbm_total, mbm_local.