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 issue.
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 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1762468 Title: Cryptoswap not working in Bionic Status in linux package in Ubuntu: Confirmed Status in linux source package in Bionic: Confirmed 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 work. 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 problem. 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 AudioDevicesInUse: USER PID ACCESS COMMAND /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 RelatedPackageVersions: 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.modalias: dmi:bvnLENOVO:bvrGJET74WW(2.24):bd03/19/2014:svnLENOVO:pn20ARA0S100:pvrThinkPadT440s:rvnLENOVO:rn20ARA0S100:rvrNotDefined:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.family: ThinkPad T440s dmi.product.name: 20ARA0S100 dmi.product.version: ThinkPad T440s dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1762468/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp