Public bug reported:
>From a long time, I use a machine without swap, because most of the time
if I run out of memory, swap would save me at too high a cost (waiting
for a long time).
Yesterday, I upgraded from 16.10 to ubuntu 17.04 and changed my sessions
from unity to gnome.
The bug occurs as firefox is requesting more memory, and about 10/15% memory is
still free.
First Firefox freeze, I try to kill -SIGKILL it without success, then whole
system freezes. It happens three times today.
I attach the kern.log extracts reporting the problem
Each time I have the same message: kernel BUG at
/build/linux-2NWldV/linux-4.10.0/include/linux/swapops.h:129
There is no swap partition, and swapinness is set to 0.
$ tail -n 2 /etc/sysctl.conf
# I say NO SWAP
vm.swappiness = 0
$ LANG=C free -h
total used free shared buff/cache available
Mem: 7,7G 2,1G 3,8G 433M 1,9G 4,9G
Swap: 0B 0B 0B
Also:
$ LANG=C systemctl --type swap
0 loaded units listed. Pass --all to see loaded but inactive units, too.
To show all installed unit files use 'systemctl list-unit-files'.
$ LANG=C systemctl list-unit-files --type swap
0 unit files listed.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: linux-image-4.10.0-20-generic 4.10.0-20.22
ProcVersionSignature: Ubuntu 4.10.0-20.22-generic 4.10.8
Uname: Linux 4.10.0-20-generic x86_64
ApportVersion: 2.20.4-0ubuntu4
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: alex 5455 F.... pulseaudio
/dev/snd/controlC0: alex 5455 F.... pulseaudio
CurrentDesktop: GNOME
Date: Tue May 2 20:46:06 2017
HibernationDevice: RESUME=UUID=870c2fd1-8a8f-49bb-9bf4-dbefaa08e583
InstallationDate: Installed on 2015-11-10 (538 days ago)
InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
MachineType: Intel Corporation Skylake Platform
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.10.0-20-generic
root=UUID=6814e3c1-8cea-4ecc-964d-535fd18782e9 ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-4.10.0-20-generic N/A
linux-backports-modules-4.10.0-20-generic N/A
linux-firmware 1.164
SourcePackage: linux
UpgradeStatus: Upgraded to zesty on 2017-02-25 (66 days ago)
dmi.bios.date: 11/06/2015
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 5.11
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: WhiteTip Mountain1 Fab2
dmi.board.vendor: Topstar
dmi.board.version: RVP7
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 9
dmi.chassis.vendor: Default string
dmi.chassis.version: Default string
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvr5.11:bd11/06/2015:svnIntelCorporation:pnSkylakePlatform:pvr0.1:rvnTopstar:rnWhiteTipMountain1Fab2:rvrRVP7:cvnDefaultstring:ct9:cvrDefaultstring:
dmi.product.name: Skylake Platform
dmi.product.version: 0.1
dmi.sys.vendor: Intel Corporation
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug zesty
** Attachment added: "extract of kern.log reporting the kernel bug"
https://bugs.launchpad.net/bugs/1687731/+attachment/4870993/+files/swap-crash-kern.log
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https://bugs.launchpad.net/bugs/1687731
Title:
System crash on a machine without swap
Status in linux package in Ubuntu:
New
Bug description:
From a long time, I use a machine without swap, because most of the
time if I run out of memory, swap would save me at too high a cost
(waiting for a long time).
Yesterday, I upgraded from 16.10 to ubuntu 17.04 and changed my
sessions from unity to gnome.
The bug occurs as firefox is requesting more memory, and about 10/15% memory
is still free.
First Firefox freeze, I try to kill -SIGKILL it without success, then whole
system freezes. It happens three times today.
I attach the kern.log extracts reporting the problem
Each time I have the same message: kernel BUG at
/build/linux-2NWldV/linux-4.10.0/include/linux/swapops.h:129
There is no swap partition, and swapinness is set to 0.
$ tail -n 2 /etc/sysctl.conf
# I say NO SWAP
vm.swappiness = 0
$ LANG=C free -h
total used free shared buff/cache
available
Mem: 7,7G 2,1G 3,8G 433M 1,9G
4,9G
Swap: 0B 0B 0B
Also:
$ LANG=C systemctl --type swap
0 loaded units listed. Pass --all to see loaded but inactive units, too.
To show all installed unit files use 'systemctl list-unit-files'.
$ LANG=C systemctl list-unit-files --type swap
0 unit files listed.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: linux-image-4.10.0-20-generic 4.10.0-20.22
ProcVersionSignature: Ubuntu 4.10.0-20.22-generic 4.10.8
Uname: Linux 4.10.0-20-generic x86_64
ApportVersion: 2.20.4-0ubuntu4
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: alex 5455 F.... pulseaudio
/dev/snd/controlC0: alex 5455 F.... pulseaudio
CurrentDesktop: GNOME
Date: Tue May 2 20:46:06 2017
HibernationDevice: RESUME=UUID=870c2fd1-8a8f-49bb-9bf4-dbefaa08e583
InstallationDate: Installed on 2015-11-10 (538 days ago)
InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
MachineType: Intel Corporation Skylake Platform
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.10.0-20-generic
root=UUID=6814e3c1-8cea-4ecc-964d-535fd18782e9 ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-4.10.0-20-generic N/A
linux-backports-modules-4.10.0-20-generic N/A
linux-firmware 1.164
SourcePackage: linux
UpgradeStatus: Upgraded to zesty on 2017-02-25 (66 days ago)
dmi.bios.date: 11/06/2015
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 5.11
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: WhiteTip Mountain1 Fab2
dmi.board.vendor: Topstar
dmi.board.version: RVP7
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 9
dmi.chassis.vendor: Default string
dmi.chassis.version: Default string
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvr5.11:bd11/06/2015:svnIntelCorporation:pnSkylakePlatform:pvr0.1:rvnTopstar:rnWhiteTipMountain1Fab2:rvrRVP7:cvnDefaultstring:ct9:cvrDefaultstring:
dmi.product.name: Skylake Platform
dmi.product.version: 0.1
dmi.sys.vendor: Intel Corporation
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