Yes, the problem does occur in mainline 4.16 and I have added the
requested tag.
If anything, 4.16.1 seems slower than 4.15 release kernel even for no
cryptswap. It could be that my disk is too slow for cryptswap, but it
did work in 17.10.
The obvious work around is not to use cryptswap, of course.
** Changed in: linux (Ubuntu Bionic)
Status: Incomplete => Confirmed
** Tags added: kernel-bug-exists-upstream
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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
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