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[yatin <1949606@xxxxxxxxxxxxxxxxxx>]

Fixed with https://review.opendev.org/c/openstack/nova/+/868419

** Changed in: nova
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/1949606

Title:
  QEMU >= 5.0.0 with -accel tcg uses a tb-size of 1GB  causing OOM
  issues in CI

Status in OpenStack Compute (nova):
  Fix Released

Bug description:
  This is a Nova tracker for a set of issues being seen in OpenStack CI
  jobs using QEMU >= 5.0.0 caused by the following change in defaults
  witin QEMU:

  https://github.com/qemu/qemu/commit/600e17b26

  https://gitlab.com/qemu-project/qemu/-/issues/693

  At present most of the impacted jobs are being given an increased
  amount of swap with lower Tempest concurrency settings to avoid the
  issue, for example for CentOS 8 stream:

  https://review.opendev.org/c/openstack/devstack/+/803706

  https://review.opendev.org/c/openstack/tempest/+/797614

  Longer term a libvirt RFE has been raised to allow Nova to control the
  size of the cache:

  https://gitlab.com/libvirt/libvirt/-/issues/229

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