I'd like to perform a bisect to figure out what commit caused this
regression. We need to identify the earliest kernel where the issue
started happening as well as the latest kernel that did not have this

Can you test the following kernels and report back? We are looking for
the first kernel version that exhibits this bug:

v4.14 Final: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.14/
v4.15-rc1: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.15-rc1/
v4.15-rc4: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.15-rc4/
v4.15 Final: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.15/

You don't have to test every kernel, just up until the kernel that first
has this bug.

Thanks in advance!

** Tags added: performing-bisect

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  Cryptoswap not working in Bionic

Status in linux package in Ubuntu:
Status in linux source package in Bionic:

Bug description:
  I have cryptoswap set up both with the 2 GB default swap file and an 8
  GB swap partition with 8 GB of ram.  However, the system does not use
  this swap when it should.  For example, if I run a little test code
  which attempts to allocate 10 GB of memory in 1 GB chuncks, the system
  hangs with no obvious use of swap.  E.g. running top shows no swap use
  before the hang.  However, if I replace cryptoswap by standard swap,
  it works as expected: allocates the requested memory and exits, using
  swap.  Of course, my disk is slow, so this takes some time but it does

  I originally noticed this problem when compiling a very large
  application.  The system would hang on ld.  I've checked hardware
  using memtest and stress.  No problems.  This took me days to track
  down but I'm 99% certain now that the problem is with cryptoswap.  If
  I compile with cryptoswap: hang.  If I compile with standard swap: no

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: linux-image-4.15.0-13-generic 4.15.0-13.14
  ProcVersionSignature: Ubuntu 4.15.0-13.14-generic 4.15.10
  Uname: Linux 4.15.0-13-generic x86_64
  ApportVersion: 2.20.9-0ubuntu4
  Architecture: amd64
   /dev/snd/controlC1:  weinberg   2425 F.... pulseaudio
   /dev/snd/controlC0:  weinberg   2425 F.... pulseaudio
  CurrentDesktop: ubuntu:GNOME
  Date: Mon Apr  9 11:57:23 2018
  EcryptfsInUse: Yes
  HibernationDevice: RESUME=UUID=8d33a538-4ec4-418d-b277-be1a9a1c1113
  InstallationDate: Installed on 2018-03-12 (28 days ago)
  InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20180114)
  MachineType: LENOVO 20ARA0S100
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-13-generic 
root=UUID=b6683bc1-7dd5-4afd-8e70-f69253403b71 ro quiet splash vt.handoff=1
   linux-restricted-modules-4.15.0-13-generic N/A
   linux-backports-modules-4.15.0-13-generic  N/A
   linux-firmware                             1.173
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 03/19/2014
  dmi.bios.vendor: LENOVO
  dmi.bios.version: GJET74WW (2.24 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 20ARA0S100
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Defined
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.product.family: ThinkPad T440s
  dmi.product.name: 20ARA0S100
  dmi.product.version: ThinkPad T440s
  dmi.sys.vendor: LENOVO

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