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Bug 2026443

Summary: 8.6/migration fails with: "qemu-kvm: get_pci_config_device: Bad config data: i=0x9a read: 3 device: 2 cmask: ff wmask: 0 w1cmask:0"
Product: Red Hat Enterprise Linux 8 Reporter: Dr. David Alan Gilbert <dgilbert>
Component: qemu-kvmAssignee: Dr. David Alan Gilbert <dgilbert>
qemu-kvm sub component: Machine Types QA Contact: Min Deng <mdeng>
Status: CLOSED CURRENTRELEASE Docs Contact:
Severity: high    
Priority: unspecified CC: berrange, coli, dgilbert, ehadley, jasowang, jean-louis, jinzhao, juzhang, mburman, mdeng, michal.skrivanek, mrezanin, mzamazal, stefanha, virt-maint, ymankad
Version: 8.6Keywords: TestOnly, Triaged
Target Milestone: rcFlags: pm-rhel: mirror+
Target Release: ---   
Hardware: x86_64   
OS: Unspecified   
Whiteboard:
Fixed In Version: Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: 1999141 Environment:
Last Closed: 2022-04-27 05:47:00 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: 1999141    
Bug Blocks: 2025468    

Comment 4 Min Deng 2022-03-17 07:02:55 UTC 
QE could reproduce the issue on the following build
qemu-kvm-6.0.0-32.module+el8.5.0+12949+ac589a5c.x86_64
qemu-kvm-6.1.0-1.module+el8.6.0+12721+8d053ff2.x86_64
1.On a guest on src host
  See attachment for qemu command line.
2.Start a guest on dst host witn "-incoming defer" 
Expected result,
Migration passed and guest works as expected.
Actual result,
(qemu) qemu-kvm: get_pci_config_device: Bad config data: i=0x34 read: 54 device: 90 cmask: ff wmask: 0 w1cmask:0
qemu-kvm: Failed to load PCIDevice:config
qemu-kvm: Failed to load pcie-root-port:parent_obj.parent_obj.parent_obj
qemu-kvm: error while loading state for instance 0x0 of device '0000:00:04.0/pcie-root-port'
qemu-kvm: load of migration failed: Invalid argument
Comment 6 Min Deng 2022-03-17 07:25:37 UTC 
I'd like to do a summary,
1.The issue can be reproduced on the following builds
qemu-kvm-6.0.0-32.module+el8.5.0+12949+ac589a5c.x86_64/qemu-kvm-6.0.0-33.module+el8.5.0+13041+05be2dc6 (it's the fix version for bug 1999141)
qemu-kvm-6.1.0-1.module+el8.6.0+12721+8d053ff2.x86_64
2.The issue wasn't reproducible on the following builds 
qemu-kvm-6.0.0-33.module+el8.5.0+13041+05be2dc6
qemu-kvm-6.2.0-8.module+el8.6.0+14324+050a5215.x86_64

I will do full regression test for case 2, will update the results later. Thanks !
Comment 7 Min Deng 2022-04-02 09:56:51 UTC 
RHEL 8.5.0 - host
RHEL-8.5.0-updates-20220222.0
kernel-4.18.0-348.12.2.el8_5.x86_64
qemu-kvm-6.0.0-33.module+el8.5.0+14188+8c5ecfdd.3.x86_64
seavgabios-bin-1.14.0-1.module+el8.4.0+8855+a9e237a9.noarch
seabios-bin-1.14.0-1.module+el8.4.0+8855+a9e237a9.noarch
edk2-ovmf-20210527gite1999b264f1f-3.el8.noarch
RHEL 8.6.0 - host
RHEL-8.6.0-20220322.0
kernel-4.18.0-372.2.1.el8.x86_64
qemu-kvm-6.2.0-9.module+el8.6.0+14480+c0a3aa0f.x86_64
seavgabios-bin-1.15.0-1.module+el8.6.0+14480+c0a3aa0f.noarch
seabios-bin-1.15.0-1.module+el8.6.0+14480+c0a3aa0f.noarch
edk2-ovmf-20220126gitbb1bba3d77-2.el8.noarch
Host: RHEL-8.6.0-20220322.0

Test passed

========================= Test Requirement: RHEL7-287068-Q35-BLKDEV(Stable Guest ABI for X86) =========================
--> Running case(1/11): RHEL7-286734-POST-COPY-[stable guest abi][x86_q35]do post-copy migration with "-M rhel8.5.0" machine type (6 min 4 sec)--- PASS.
--> Running case(2/11): RHEL7-286734-[stable guest abi][x86_q35]do forward and backward migration with "-M rhel8.5.0" machine type (8 min 0 sec)--- PASS.
--> Running case(3/11): RHEL7-241891-POST-COPY-[stable guest abi][x86_q35]do post-copy migration with "-M rhel8.4.0" machine type (5 min 40 sec)--- PASS.
--> Running case(4/11): RHEL7-241891-[stable guest abi][x86_q35]do forward and backward migration with "-M rhel8.4.0" machine type (8 min 0 sec)--- PASS.
--> Running case(5/11): RHEL-202178-[stable guest abi][x86_q35]Test stable guest abi with tsx-ctrl on Cascadelaker-Server (0 min 4 sec)--- CANCEL.
--> Running case(6/11): RHEL7-198262-POST-COPY-[stable guest abi][x86_q35]do post-copy migration with "-M rhel8.3.0" machine type (5 min 36 sec)--- PASS.
--> Running case(7/11): RHEL7-198262-[stable guest abi][x86_q35]do forward and backward migration with "-M rhel8.3.0" machine type (8 min 0 sec)--- PASS.
--> Running case(8/11): RHEL7-189110-[stable guest abi][x86_q35]do forward and backward migration with "-M rhel8.2.0" machine type (8 min 8 sec)--- PASS.
--> Running case(9/11): RHEL7-189110-POST-COPY-[stable guest abi][x86_q35]do post-copy migration with "-M rhel8.2.0" machine type (5 min 36 sec)--- PASS.
--> Running case(10/11): RHEL7-177269-[stable guest abi][x86_q35]do forward and backward migration with "-M rhel8.1.0" machine type (8 min 4 sec)--- PASS.
--> Running case(11/11): RHEL7-177269-POST-COPY-[stable guest abi][x86_q35]do post-copy migration with "-M rhel8.1.0" machine type (6 min 24 sec)--- PASS.
Comment 8 Min Deng 2022-04-13 11:47:16 UTC 
Base on above test results, QE will close it as currentrelease, thanks a lot. Feel free to update this bug if you have any concerns.