[Bug 1976287] Autopkgtest regression report (casper/1.445.2)

[Ubuntu SRU Bot]

All autopkgtests for the newly accepted casper (1.445.2) for focal have finished running.
The following regressions have been reported in tests triggered by the package:

casper/1.445.2 (amd64)


Please visit the excuses page listed below and investigate the failures, proceeding afterwards as per the StableReleaseUpdates policy regarding autopkgtest regressions [1].

https://people.canonical.com/~ubuntu-archive/proposed-
migration/focal/update_excuses.html#casper

[1] https://wiki.ubuntu.com/StableReleaseUpdates#Autopkgtest_Regressions

Thank you!

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https://bugs.launchpad.net/bugs/1976287

Title:
  casper: qemu instances too small during autopkgtest (potential OOM
  failures)

Status in casper package in Ubuntu:
  Fix Released
Status in casper source package in Focal:
  Fix Committed
Status in casper source package in Jammy:
  Fix Committed
Status in casper source package in Kinetic:
  Fix Released

Bug description:
  [Impact]

  During autopkgtest we are creating VMs with 768MB of RAM, that used to
  be enough in the past, but nowdays we typically require more memory
  and we may trigger some sporadic out-of-memory failures during
  autopkgtest.

  [Test case]

  Run autopkgtest with a recent kernel (e.g., 5.15 or above).

  [Fix]

  Bump up the memory size to 1G.

  [Regression potential]

  We may see regressions in test systems with a small amount of memory
  (in the host / hypervisor), because after this change we need more RAM
  in order to run and complete autopkgtest successfully.

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