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[Ian Whitfield <2105142@xxxxxxxxxxxxxxxxxx>]

** No longer affects: linux-gcp (Ubuntu Xenial)

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https://bugs.launchpad.net/bugs/2105142

Title:
  GCP kernels need CONFIG_VIRTIO_BALLOON=m (not =y)

Status in linux-gcp package in Ubuntu:
  Fix Released
Status in linux-gcp source package in Bionic:
  New
Status in linux-gcp source package in Focal:
  New
Status in linux-gcp source package in Jammy:
  New
Status in linux-gcp source package in Noble:
  New
Status in linux-gcp source package in Oracular:
  New
Status in linux-gcp source package in Plucky:
  Fix Released

Bug description:
  SRU Justification

  [Impact]

  Google requested that the virtio_balloon module be made loadable,
  rather than built-in. This is to support disabling the module at
  runtime, which is specified as possible in their documentation:
  https://cloud.google.com/compute/docs/dynamic-resource-
  management#disabling_the_virtio_memory_balloon_device

  [Fix]

  Change CONFIG_VIRTIO_BALLOON to build the driver as a loadable module
  rather than a built-in, drivers/virtio/* is already in the inclusion
  list, so the driver will be included in the main modules package.

  [Test Plan]

  List files in the linux-modules package and verify that
  virtio_balloon.ko is there.

  [Regression potential]

  The regression potential is very low since the module will still be
  included with all cloud installations and a user has to manually
  disable it to get different behavior.

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