This bug was fixed in the package linux - 4.18.0-13.14

---------------
linux (4.18.0-13.14) cosmic; urgency=medium

  * linux: 4.18.0-13.14 -proposed tracker (LP: #1806409)

  * linux-buildinfo: pull out ABI information into its own package
    (LP: #1806380)
    - [Packaging] limit preparation to linux-libc-dev in headers
    - [Packaging] commonise debhelper invocation
    - [Packaging] ABI -- accumulate abi information at the end of the build
    - [Packaging] buildinfo -- add basic build information
    - [Packaging] buildinfo -- add firmware information to the flavour ABI
    - [Packaging] buildinfo -- add compiler information to the flavour ABI
    - [Packaging] buildinfo -- add buildinfo support to getabis

  * linux packages should own /usr/lib/linux/triggers (LP: #1770256)
    - [Packaging] own /usr/lib/linux/triggers

  * Regression: hinic performance degrades over time (LP: #1805248)
    - Revert "net-next/hinic: add checksum offload and TSO support"

  * CVE-2018-18710
    - cdrom: fix improper type cast, which can leat to information leak.

 -- Khalid Elmously <khalid.elmou...@canonical.com>  Wed, 05 Dec 2018
05:10:51 +0000

** Changed in: linux (Ubuntu Cosmic)
       Status: Fix Committed => Fix Released

** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2018-18710

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https://bugs.launchpad.net/bugs/1805248

Title:
  Regression: hinic performance degrades over time

Status in linux package in Ubuntu:
  Fix Committed
Status in linux source package in Cosmic:
  Fix Released
Status in linux source package in Disco:
  Fix Committed

Bug description:
  [Impact]
  Bug 1800664 introduced checksum offload and TSO support for HiNIC adapters. 
While that did improve performance in short iperf runs, longer runs were later 
found to show a significant regression in performance:
    https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1800664/comments/3

  [Test Case]
  iperf -c 192.168.99.1 -P5

  [Fix]
  Revert the offending patch.

  [Regression Risk]
  This is reverting a patch, returning the driver to 18.10 GA behavior.

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