[Bug 1703393] Re: TCP offloads disabled by default

[Launchpad Bug Tracker]

This bug was fixed in the package systemd - 232-21ubuntu7

---------------
systemd (232-21ubuntu7) zesty; urgency=medium

  * networkd: accept `:' in ifnames in systemd/networkd. (LP: #1714933)
  * networkd: add support for ActiveSlave and PrimarySlave netdev options.
    (LP: #1709135)
  * Cherrypick upstream fix for a race between .mount and .automount units,
    which currently may result in automounts hanging. (LP: #1709649)
  * systemd.postinst: Fix-up version number check in the previous sru.
    The version check in the postinst was too tight, thus the SRU fix failed
    validation. (LP: #1710410)

systemd (232-21ubuntu6) zesty; urgency=medium

  * link: Fix offload features initialization.
    This fixes a regression introduced in v232 which caused TCP
    segmentation offloads being disabled by default, resulting in
    significant performance issues under certain conditions. (Closes: #864073)
    (LP: #1703393)
  * loginctl: Fix loginctl ignoring user given session IDs at command-line
    (LP: #1682154)
  * Disable fallback DNS servers.
    This causes resolved to call-home to google, attempt to access network when
    none is available, and spams logs. (LP: #1449001)
  * initramfs-tools: trigger udevadm add actions with subsystems first.
    This updates the initramfs-tools init-top udev script to trigger udevadm
    actions with type specified. This mimicks the
    systemd-udev-trigger.service. Without type specified only devices are
    triggered, but triggering subsystems may also be required and should happen
    before triggering the devices. This is the case for example on s390x with zdev
    generated udev rules. (LP: #1713536)
  * Enable systemd-resolved by default. (LP: #1710410)
  * core: fix systemd failing to serialize tasks correctly on daemon-reload.
    (LP: #1702823)

 -- Dimitri John Ledkov <xnox at ubuntu.com>  Wed, 04 Oct 2017 14:22:02
+0100

** Changed in: systemd (Ubuntu Zesty)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1703393

Title:
  TCP offloads disabled by default

Status in systemd:
  Unknown
Status in systemd package in Ubuntu:
  Fix Released
Status in systemd source package in Zesty:
  Fix Released
Status in systemd package in Debian:
  Fix Released

Bug description:
  [Impact]
  Regression in systemd v232 resulted in IPv4 TCP segmentation offload ("tso" in ethtool) to be disabled by default, yet previously it was enabled.

  [Fix]
  Backport upstream patch to fix the regression

  [Testcase]
  Use ethtool to verify that tso is enabled on e.g. e1000e card with fixed package.

  [Regression Potential]
  Link features were incorrectly initialised, this fix changes the initialisation code back to the correct default values. This changes the defaults back to what they are in all other releases. Users on zesty release may have been accustomed to the wrong defaults and may need to adjust .link files to e.g. disable tso if that is the behavior they want.

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