This bug was fixed in the package linux-oracle - 4.15.0-1010.12
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linux-oracle (4.15.0-1010.12) bionic; urgency=medium
* linux-oracle: 4.15.0-1010.12 -proposed tracker (LP: #1819704)
* hot add VF to net_failover - could not rename interface '8' from 'eth0' to
'ens4':
This bug was fixed in the package linux-oracle - 4.15.0-1010.12
---
linux-oracle (4.15.0-1010.12) bionic; urgency=medium
* linux-oracle: 4.15.0-1010.12 -proposed tracker (LP: #1819704)
* hot add VF to net_failover - could not rename interface '8' from 'eth0' to
'ens4':
** Changed in: linux-oracle (Ubuntu Bionic)
Status: In Progress => Fix Committed
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https://bugs.launchpad.net/bugs/1815268
Title:
hot add VF to net_failover -
** Description changed:
+ [Impact]
+
+ udev fails to rename a new interface when a VF is added due to a race
+ between the kernel and userspace.
+
+ It's desirable to get a consistent and predictable name, as otherwise
+ any persistent configuration in userspace can't be applied properly on
+
** Also affects: linux-oracle (Ubuntu)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Bionic)
Importance: Undecided
Status: New
** Also affects: linux-oracle (Ubuntu Bionic)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Bionic)
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:
** Tags added: patch
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https://bugs.launchpad.net/bugs/1815268
Title:
hot add VF to net_failover - could not rename interface '8' from
'eth0' to 'ens4': Device or
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"
** Tags added: bjf-tracking
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https://bugs.launchpad.net/bugs/1815268
Title:
hot add VF to net_failover - could not rename interface '8' from
'eth0' to 'ens4': Device or
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
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