It is verified SEV works for the v5.15 kernel where we wants SEV to be
supported. Closing this one for v5.11 now.
** Changed in: linux-oracle-5.11 (Ubuntu)
Status: New => Invalid
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Thanks for the info, Fabio. I didn't realize the 5.11 kernel is past EoL
already. I'll ask the team to check the result on v5.4 and v5.15 kernel.
Stay tuned.
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** Description changed:
Guest kernel panic can be observed when Ubuntu SEV guest with mlx5 vfio-pci
is started
as iperf3 server using "iperf3 -s" and as soon as the client tries to connect
with it.
Steps to reproduce:
HOST INFO
Host type : OCI (Oracle Cloud) Bare-Metal
** Description changed:
Guest kernel panic can be observed when Ubuntu SEV guest with mlx5 vfio-pci
is started
as iperf3 server using "iperf3 -s" and as soon as the client tries to connect
with it.
Steps to reproduce:
HOST INFO
Host type : OCI (Oracle Cloud) Bare-Metal
Public bug reported:
The interm patch in LP# 1815268 was positioned as a way of mitigation to
the rename race condition as described in that bug. Now, the upstream
patch has been accepted and it eliminates the need of the delay. The
patch is now in staging tree and should be pulled into mainline
Note the patch attached is a tentative workaround that helps mitigate
the issue, but not intended to be a suggested fix. I've initiated a
thread in the Linux netdev mailing list for the resolution. Please find
the relevant thread starting at:
Please find attached a patch (from Oracle Linux) that mitigates the race
with a tunable delay of 100ms.
** Patch added:
"0001-net_failover-delay-taking-over-primary-device-to-acc.patch"
apport information
** Attachment added: "ProcInterrupts.txt"
https://bugs.launchpad.net/bugs/1815268/+attachment/5237190/+files/ProcInterrupts.txt
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apport information
** Attachment added: "PulseList.txt"
https://bugs.launchpad.net/bugs/1815268/+attachment/5237192/+files/PulseList.txt
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apport information
** Attachment added: "UdevDb.txt"
https://bugs.launchpad.net/bugs/1815268/+attachment/5237193/+files/UdevDb.txt
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apport information
** Attachment added: "CurrentDmesg.txt"
https://bugs.launchpad.net/bugs/1815268/+attachment/5237185/+files/CurrentDmesg.txt
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apport information
** Attachment added: "WifiSyslog.txt"
https://bugs.launchpad.net/bugs/1815268/+attachment/5237194/+files/WifiSyslog.txt
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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apport information
** Attachment added: "ProcModules.txt"
https://bugs.launchpad.net/bugs/1815268/+attachment/5237191/+files/ProcModules.txt
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apport information
** Tags added: apport-collected xenial
** Description changed:
Host has a QEMU/KVM setup with standby virtio-net [1]:
# qemu-system-x86_64 -name guest=ubuntu-xenial,debug-threads=on -machine
pc,accel=kvm,usb=off -cpu host -m 4096 -realtime mlock=off -smp
apport information
** Attachment added: "Lspci.txt"
https://bugs.launchpad.net/bugs/1815268/+attachment/5237188/+files/Lspci.txt
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https://bugs.launchpad.net/bugs/1815268
apport information
** Attachment added: "ProcCpuinfoMinimal.txt"
https://bugs.launchpad.net/bugs/1815268/+attachment/5237189/+files/ProcCpuinfoMinimal.txt
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apport information
** Attachment added: "HookError_generic.txt"
https://bugs.launchpad.net/bugs/1815268/+attachment/5237186/+files/HookError_generic.txt
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apport information
** Attachment added: "CRDA.txt"
https://bugs.launchpad.net/bugs/1815268/+attachment/5237184/+files/CRDA.txt
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https://bugs.launchpad.net/bugs/1815268
apport information
** Attachment added: "IwConfig.txt"
https://bugs.launchpad.net/bugs/1815268/+attachment/5237187/+files/IwConfig.txt
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Public bug reported:
Host has a QEMU/KVM setup with standby virtio-net [1]:
# qemu-system-x86_64 -name guest=ubuntu-xenial,debug-threads=on -machine
pc,accel=kvm,usb=off -cpu host -m 4096 -realtime mlock=off -smp
4,sockets=1,cores=2,threads=2 -monitor stdio -vnc :1 -boot
order=n,menu=on -serial
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