This bug is missing log files that will aid in diagnosing the problem.
While running an Ubuntu kernel (not a mainline or third-party kernel)
please enter the following command in a terminal window:

apport-collect 1917918

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.

** Changed in: linux (Ubuntu)
       Status: New => Incomplete

** Changed in: linux (Ubuntu Bionic)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1917918

Title:
  Add FUA support for XFS

Status in linux package in Ubuntu:
  Incomplete
Status in linux source package in Bionic:
  Incomplete

Bug description:
  [Impact]

  This 4 patch set adds backported support for Forced Unit Access (FUA)
  on XFS file systems to the 18.04 (Bionic) GA (4.15) kernel. FUA on XFS
  was added upstream in 4.18.

  FUA on XFS is important for SQL server work loads.

  [Test Plan]
  SQLIOSIM (a package from Microsoft) was used to test performance 
improvements. Tests were run with an XFS file system mounted on a persistent 
memory block device (PMEM) partition. Performance metrics were found to exhibit 
satisfactory improvement gains from the GA kernel.

  [Where problems could occur]

  Well, these are patches to file system code. They _could_ cause
  widespread corruption. However, multiple test passes with sqliosim
  exhibited no issues.

  [Other Info]
   
  See attached sqliosim.cfg.ini configuration file for test run parameters.

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