Bug 1873417
| Summary: | AMD/NUMA topology - revert 5.1 changes | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux Advanced Virtualization | Reporter: | Dr. David Alan Gilbert <dgilbert> |
| Component: | qemu-kvm | Assignee: | Igor Mammedov <imammedo> |
| qemu-kvm sub component: | CPU Models | QA Contact: | Yumei Huang <yuhuang> |
| Status: | CLOSED ERRATA | Docs Contact: | |
| Severity: | unspecified | ||
| Priority: | high | CC: | ailan, babu.moger, chayang, ctatman, dgilbert, ehabkost, ehadley, imammedo, jen, jinzhao, juzhang, nanliu, virt-maint, wei.huang2, xianwang, xiaohli, ymankad, yuhuang |
| Version: | 8.3 | Keywords: | Triaged |
| Target Milestone: | rc | Flags: | pm-rhel:
mirror+
|
| Target Release: | --- | ||
| Hardware: | x86_64 | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | qemu-kvm-5.1.0-5.module+el8.3.0+7975+b80d25f1 | Doc Type: | If docs needed, set a value |
| Doc Text: | Story Points: | --- | |
| Clone Of: | 1728166 | Environment: | |
| Last Closed: | 2020-11-17 17:50:55 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: | 1795644, 1828750 | ||
Replicated on downstream: qemu-kvm-core-4.2.0-29.module+el8.2.1+7712+3c3fe332.2.x86_64 /usr/libexec/qemu-kvm -M pc-q35-rhel8.2.0 -cpu EPYC -smp 8,sockets=1,cores=8 -numa node,cpus=0-3 -numa node,cpus=4-7 -m 2048 -nographic (qemu) migrate "tcp:vl721:4444" qemu-kvm-core-5.1.0-4.module+el8.3.0+7846+ae9b566f.x86_64 /usr/libexec/qemu-kvm -M pc-q35-rhel8.2.0 -cpu EPYC -smp 8,sockets=1,cores=8 -numa node,cpus=0-3 -numa node,cpus=4-7 -m 2048 -nographic -incoming tcp::4444 qemu-kvm: warning: Default splitting of RAM between nodes is deprecated, Use '-numa node,memdev' to explictly define RAM allocation per node qemu-kvm: Unknown savevm section or instance 'apic' 4. Make sure that your current VM setup matches your saved VM setup, including any hotplugged devices qemu-kvm: load of migration failed: Invalid argument Can we fix this just by turning off '.use_epyc_apic_id_encoding' on the CPU models? (In reply to Dr. David Alan Gilbert from comment #5) > Can we fix this just by turning off '.use_epyc_apic_id_encoding' on the CPU > models? We can do that. It will be good if we can fix couple of decoding issues in CPUID 0x8000001e with that. I think we are almost there. https://lore.kernel.org/qemu-devel/56d9a7fb-d88a-258d-1c67-768d63369643@amd.com/ Hopefully it will resolved soon. thanks 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 (virt:8.3 bug fix and enhancement update), 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-2020:5137 |
Reproducer using upstream QEMU: source: # qemu-4.2 -M pc-i440fx-4.2 -cpu EPYC -smp 8,sockets=1,cores=8 -numa node,cpus=0-3 -numa node,cpus=4-7 -m 2048 -snapshot -monitor stdio -enable-kvm /vmimage (qemu) stop (qemu) migrate "exec:gzip -c > STATEFILE.gz" target: # qemu-5.1 -cpu EPYC -smp 8,sockets=1,cores=8 -numa node,cpus=0-3 -numa node,cpus=4-7 -m 2048 -snapshot -monitor stdio -enable-kvm -M pc-i440fx-4.2 -incoming "exec: gzip -c -d STATEFILE.gz" /vmimage migration fails with: qemu-system-x86_64: Unknown savevm section or instance 'apic' 4. Make sure that your current VM setup matches your saved VM setup, including any hotplugged devices qemu-system-x86_64: load of migration failed: Invalid argument