group.of.nepali.translators team mailing list archive

[Stefan Bader <stefan.bader@xxxxxxxxxxxxx>]

** Also affects: linux (Ubuntu Xenial)
   Importance: Undecided
       Status: New

-- 
You received this bug notification because you are a member of नेपाली
भाषा समायोजकहरुको समूह, which is subscribed to Xenial.
Matching subscriptions: Ubuntu 16.04 Bugs
https://bugs.launchpad.net/bugs/1700834

Title:
  Intel i40e PF reset under load

Status in linux package in Ubuntu:
  Confirmed
Status in linux source package in Xenial:
  New

Bug description:
  SRU Justification:

  Impact:

  	Using an Intel i40e network device, under heavy traffic load with
  TSO enabled, the device will spontaneously reset itself and issue errors
  similar to the following:

  Jun 14 14:09:51 hostname kernel: [4253913.851053] i40e 0000:05:00.1: TX driver issue detected, PF reset issued 
  Jun 14 14:09:53 hostname kernel: [4253915.476283] i40e 0000:05:00.1: TX driver issue detected, PF reset issued 
  Jun 14 14:09:54 hostname kernel: [4253917.411264] i40e 0000:05:00.1: TX driver issue detected, PF reset issued 

  	This causes a full reset of the PF, which causes an interruption
  in traffic flow.

  	In this case, these errors arise from a bug in the i40e device
  driver introduced by commit:

  commit 584a837e26408c66e87df87a022faa6a54c2b020
  Author: Alexander Duyck <aduyck@xxxxxxxxxxxx>
  Date:   Wed Feb 17 11:02:50 2016 -0800

      i40e/i40evf: Rewrite logic for 8 descriptor per packet check

  	This patch was added to the Xenial kernel beginning with version
  4.4.0-8.23.  This bug does not manifest on any other Ubuntu kernel series.

  
  Fix:

          This error is resolved upstream by:

  commit 3f3f7cb875c0f621485644d4fd7453b0d37f00e4
  Author: Alexander Duyck <aduyck@xxxxxxxxxxxx>
  Date:   Wed Mar 30 16:15:37 2016 -0700

      i40e/i40evf: Limit TSO to 7 descriptors for payload instead of 8 per packet
      
  	This fix was never backported into the Xenial 4.4 kernel series.
      

  Testcase:

  	In this case, the issue occurs at a customer site using i40e based
  Intel network cards with SR-IOV enabled.  Under heavy load, the card will
  reset itself as described.  The customer has tested the 3f3f7cb875c patch
  in their environment and confirmed that it resolves the issue.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1700834/+subscriptions