This bug is awaiting verification that the kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed- xenial' to 'verification-done-xenial'. If the problem still exists, change the tag 'verification-needed-xenial' to 'verification-failed- xenial'.
If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you! ** Tags added: verification-needed-xenial -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1713553 Title: Intel i40e PF reset due to incorrect MDD detection Status in linux package in Ubuntu: In Progress Status in linux source package in Xenial: Fix Committed Bug description: [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. This was partially fixed by Xenial commit 12f8cc59d5886b86372f45290166deca57a60d7a, however there is one additional upstream commit required to fully fix the issue: commit 841493a3f64395b60554afbcaa17f4350f90e764 Author: Alexander Duyck <alexander.h.du...@intel.com> Date: Tue Sep 6 18:05:04 2016 -0700 i40e: Limit TX descriptor count in cases where frag size is greater than 16K This fix was never backported into the Xenial 4.4 kernel series, but is already present in the Xenial HWE (and Zesty) 4.10 kernel. [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. [Regression Potential] As with any change to a network card driver, this may cause regressions with network I/O through i40e card(s). However, this specific change only increases the likelyhood that any specific large TSO tx will need to be linearized, which will avoid the PF reset. Linearizing a TSO tx that did not need to be linearized will not cause any failures, it may only decrease performance slightly. However this patch should only cause linearization when required to avoid the MDD detection and PF reset. [Other Info] The previous bug for this issue is bug 1700834. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1713553/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
