[Bug 1819728] Re: Please backport "fix race between daemon-reload and other commands #8803" to 16.04 (for UC16)

Michael Vogt michael.vogt at canonical.com
Wed Mar 13 06:43:35 UTC 2019


** Patch added: "debdiff with a port of the fix in PR#8803 for bionic"
   https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1819728/+attachment/5245782/+files/systemd_237-3ubuntu10.15.1.debdiff

** Summary changed:

- Please backport "fix race between daemon-reload and other commands #8803" to 16.04 (for UC16)
+ Please backport "fix race between daemon-reload and other commands #8803" to 16.04 (for UC16) and 18.04 (for UC18)

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Title:
  Please backport "fix race between daemon-reload and other commands
  #8803" to 16.04 (for UC16) and 18.04 (for UC18)

Status in systemd package in Ubuntu:
  New
Status in systemd source package in Xenial:
  New
Status in systemd source package in Bionic:
  New

Bug description:
  On Ubuntu Core we recently hit the a race in daemon-reload and
  systemctl twice. This race is fixed in systemd upstream: "fix race
  between daemon-reload and other commands #8803".

  To reproduce its enough to run:

  for i in $(seq 50); do
    systemctl daemon-reload &
    systemctl start ssh &
  done

  This will result in "systemctl start ssh" hanging in ppoll. With the
  patch applied the hangs go away.

  This change is already in the systemd in cosmic+

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