[Bug 2027575] [NEW] autopkgtest net is failing on 6.2 kernels with 'System is deadlocked on memory'

[Roxana Nicolescu]

Public bug reported:

[Impact]
In debian/tests/run-image we instantiate an image with 512Mb of ram, but recent jammy/lunar 6.2 kernels need more than that.

Example of a test failure:
https://autopkgtest.ubuntu.com/results/autopkgtest-lunar/lunar/amd64/i/initramfs-tools/20230619_135049_ab1cb@/log.gz

'net' test fails with a kernel panic due to out-of-memory.

[Fix]

Increase the size to 1Gb.

[Test Plan]
1. Download a lunar image:
$ autopkgtest-buildvm-ubuntu-cloud -v -a amd64 -r lunar
2. Run autotestpkg tests from initramfs-tools package. The "net" test is the one that depends on the image instantiated by 'run-image'. The testcase should complete successfully without the kernel panic.
$ autopkgtest initramfs-tools -- qemu autopkgtest-lunar-amd64.img 


[Where problems could occur]
The usage of a larger image for the tests could fail if the the test system is low on ram size.

** Affects: initramfs-tools (Ubuntu)
     Importance: Undecided
         Status: New

** Affects: initramfs-tools (Ubuntu Jammy)
     Importance: Undecided
         Status: New

** Affects: initramfs-tools (Ubuntu Lunar)
     Importance: Undecided
         Status: New


** Tags: sru-20230612 sru-230230710

** Tags added: sru-20230612 sru-230230710

** Also affects: initramfs-tools (Ubuntu Jammy)
   Importance: Undecided
       Status: New

** Also affects: initramfs-tools (Ubuntu Lunar)
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/2027575

Title:
  autopkgtest net is failing on 6.2 kernels with 'System is deadlocked
  on memory'

Status in initramfs-tools package in Ubuntu:
  New
Status in initramfs-tools source package in Jammy:
  New
Status in initramfs-tools source package in Lunar:
  New

Bug description:
  [Impact]
  In debian/tests/run-image we instantiate an image with 512Mb of ram, but recent jammy/lunar 6.2 kernels need more than that.

  Example of a test failure:
  https://autopkgtest.ubuntu.com/results/autopkgtest-lunar/lunar/amd64/i/initramfs-tools/20230619_135049_ab1cb@/log.gz

  'net' test fails with a kernel panic due to out-of-memory.

  [Fix]

  Increase the size to 1Gb.

  [Test Plan]
  1. Download a lunar image:
  $ autopkgtest-buildvm-ubuntu-cloud -v -a amd64 -r lunar
  2. Run autotestpkg tests from initramfs-tools package. The "net" test is the one that depends on the image instantiated by 'run-image'. The testcase should complete successfully without the kernel panic.
  $ autopkgtest initramfs-tools -- qemu autopkgtest-lunar-amd64.img 

  
  [Where problems could occur]
  The usage of a larger image for the tests could fail if the the test system is low on ram size.

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