Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v4.11 kernel[0].

If this bug is fixed in the mainline kernel, please add the following
tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag:
'kernel-bug-exists-upstream'.

Once testing of the upstream kernel is complete, please mark this bug as
"Confirmed".


Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.11-rc8

** Changed in: linux (Ubuntu)
   Importance: Undecided => High

** Tags added: kernel-da-key

** Changed in: linux (Ubuntu)
       Status: Confirmed => Incomplete

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https://bugs.launchpad.net/bugs/1687731

Title:
  System crash on a machine without swap

Status in linux package in Ubuntu:
  Incomplete

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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