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[Joseph Salisbury <joseph.salisbury@xxxxxxxxxxxxx>]

Upstream commit 1f12e32f4cd5243ae46d8b933181be0d022c6793(Commit
31c2013e4 in Xenial) has introduced a regression, reported in bug
1573231.  The commit message for that commit has a bug link to this bug.

I'll ping upstream about the regression and request feedback.

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https://bugs.launchpad.net/bugs/1397880

Title:
  [Feature] Memory Bandwidth Monitoring

Status in intel:
  New
Status in linux package in Ubuntu:
  Fix Released
Status in xen package in Ubuntu:
  Fix Released
Status in linux source package in Xenial:
  Fix Released
Status in xen source package in Xenial:
  Fix Released

Bug description:
  Memory Bandwidth Monitoring (MBM) is a CPU feature included in the family of Platform QoS features.  It is used to track memory bandwidth usage for a specific task, or group of tasks.
  Memory Bandwidth Monitoring is an extension of the existing Cache QoS Monitoring (CQM) feature found in Haswell server.  The mechanism used is the same, where tasks are associated with an Resource Monitoring ID (RMID), which the CPU uses to track the bandwidth usage.

  Upstream status:
  Kernel - 4.6
  Xen - target 4.6

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