kernel-packages team mailing list archive

[Joseph Salisbury <joseph.salisbury@xxxxxxxxxxxxx>]

Did this issue start happening after an update/upgrade?  Was there a
prior kernel version where you were not having this particular problem?

Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v4.5 kernel[0].

If this bug is fixed in the mainline kernel, please add the following
tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag:
'kernel-bug-exists-upstream'.

Once testing of the upstream kernel is complete, please mark this bug as
"Confirmed".


Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.5-rc3-wily/

** Tags added: kernel-da-key

** Changed in: linux (Ubuntu)
       Status: Confirmed => Incomplete

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https://bugs.launchpad.net/bugs/1540405

Title:
  i40e fails virtual networking

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  With linux-hwe-generic-trusty we see kern.log entries for "TX driver
  issue detected, PF reset issued" on a  NIC in a bond, followed by the
  same interface going down and up again. After this time networking to
  virtual machines bridged to that bond fails.

  We see either asymmetric traffic, with ARP replies not reaching the
  VMs, or no traffic at all to or from VMs.

  In this context, these are nova-compute nodes using OpenvSwitch and
  KVM.

  Reloading the i40e module corrects the networking.

  Setting TCP Segmentation Offload off on the NICs seems to prevent the
  PF reset, and we don't believe we have seen VM networking problems
  since doing so.

  # ethtool -i eth5
  driver: i40e
  version: 1.3.4-k
  firmware-version: f4.33.31377 a1.2 n4.41 e1866
  bus-info: 0000:04:00.1
  supports-statistics: yes 
  supports-test: yes 
  supports-eeprom-access: yes 
  supports-register-dump: yes 
  supports-priv-flags: yes

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