kernel-packages team mailing list archive

["Christopher M. Penalver" <christopher.m.penalver@xxxxxxxxx>]

yas:
"Regarding your question, effectively after reproducing the problem with the previous kernel I've got a crash file from google-chrome."

Please do file a crash report against that crash file as outlined in
https://wiki.ubuntu.com/ReportingBugs .

Despite this, could you please test the latest upstream kernel available
from the very top line at the top of the page from
http://kernel.ubuntu.com/~kernel-ppa/mainline/?C=N;O=D (the release
names are irrelevant for testing, and please do not test the daily
folder)? Install instructions are available at
https://wiki.ubuntu.com/Kernel/MainlineBuilds . This will allow
additional upstream developers to examine the issue.

If the latest kernel did not allow you to test to the issue (ex. you couldn't boot into the OS) please make a comment in your report about this, and continue to test the next most recent kernel version until you can test to the issue. Once you've tested the upstream kernel, please comment on which kernel version specifically you tested. If this issue is fixed in the mainline kernel, please add the following tags by clicking on the yellow circle with a black pencil icon, next to the word Tags, located at the bottom of the report description:
kernel-fixed-upstream
kernel-fixed-upstream-X.Y-rcZ

Where X, Y, and Z are numbers corresponding to the kernel version.

If the mainline kernel does not fix the issue, please add the following tags:
kernel-bug-exists-upstream
kernel-bug-exists-upstream-X.Y-rcZ

Please note, an error to install the kernel does not fit the criteria of
kernel-bug-exists-upstream.

Once testing of the latest upstream kernel is complete, please mark this
report's Status as Confirmed. Please let us know your results.

Thank you for your understanding.

** Description changed:

- When a process demands increasingly to the limit of memory available the system becomes unusable, mouse start to not respond promptly or not at all, and eventually the system resets to the logon screen. 
- The expected behavior would be not to lose control of the machine but crash eventually the process or application asking for resources. 
+ What is expected to happen is when all RAM and swap is either nearly or
+ fully consumed by a process or application, the OS remains responsive,
+ it doesn't crash to the login screen, and eventually the process or
+ application asking for the majority of resources is force closed.
  
- What I have done?
- - Discard hardware problems, testing memory with memtest86+. No issue detected there.
- - Test without swap file and with swap file of 4Gb (similar to main memory). Same crash.
- - Following the advise on http://askubuntu.com/questions/41778/computer-freezing-on-almost-full-ram-possibly-disk-cache-problem set the sysctl vm.min_free_kbytes and adjust swappiness as described here https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/comments/41
- With this adjustment the issue have been reduced drastically, I'm not losing control of the system even if it slows down when ramping up the swap use.
- - I've not yet tried the suggestion here https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/comments/35 because with the previous tip the system is behaving much as expected, but I have it in the list to test it if I experiment further crashes.
+ What happens instead is the mouse stops responding promptly or not at
+ all, and eventually the system resets to the logon screen.
  
- How did I reproduce it?
- - First, I experience this when having several chrome tabs open (chrome is eating a lot of memory lately being in tabs or in extensions). It's easy to press CTRL+T several times and arrive to a memory limit.
- - Second, I experience this when using virtualbox, given that the vm was asking half of the memory available, as soon as I open a couple of tabs in chrome in the host the system started to be unusable.
+ Specific scenarios to reproduce:
+ - First, when having several chrome tabs open, press CTRL+T several times and arrive to a memory limit.
+ - Second, I experience this when using virtualbox, given that the VM was asking for half of the memory available, as soon as I open a couple of tabs in chrome in the host the system started to be unusable.
  - Third, to reproduce it easily I've installed memtester application and run a couple of instances of it asking 2G chunks, this effectively reproduce the crash very effectively.
  
- Tell me if I should add any other log to help diagnose the issue.
- Hope this helps.
+ I've checked:
+ - All 4GB of memory passed memtest86+.
+ - Tested with and without 4GB swap file same crash.
+ 
+ Untested: Adding in /etc/rc.local :
+ sysctl vm.vfs_cache_pressure=100000
+ 
+ WORKAROUND: By adding into /etc/sysctl.conf the following, I'm not losing control of the system even if it slows down when ramping up the swap use:
+ vm.min_free_kbytes=131072
+ vm.swappiness=5
  
  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-65-generic 3.13.0-65.106
  ProcVersionSignature: Ubuntu 3.13.0-65.106-generic 3.13.11-ckt26
  Uname: Linux 3.13.0-65-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.15
  Architecture: amd64
  AudioDevicesInUse:
-  USER        PID ACCESS COMMAND
-  /dev/snd/controlC0:  yas        3625 F.... pulseaudio
+  USER        PID ACCESS COMMAND
+  /dev/snd/controlC0:  yas        3625 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Sun Oct 11 10:41:41 2015
  InstallationDate: Installed on 2015-01-17 (266 days ago)
  InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
  MachineType: SAMSUNG ELECTRONICS CO., LTD. 900X3C/900X3D/900X3E/900X4C/900X4D
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-65-generic.efi.signed root=UUID=c5d1dcf0-367e-4643-99f9-735befcdaba1 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
-  linux-restricted-modules-3.13.0-65-generic N/A
-  linux-backports-modules-3.13.0-65-generic  N/A
-  linux-firmware                             1.127.15
+  linux-restricted-modules-3.13.0-65-generic N/A
+  linux-backports-modules-3.13.0-65-generic  N/A
+  linux-firmware                             1.127.15
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 07/15/2015
  dmi.bios.vendor: Phoenix Technologies Ltd.
  dmi.bios.version: P11ABK
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: NP900X3E-A01ES
  dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD.
  dmi.board.version: FAB1
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 9
  dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD.
  dmi.chassis.version: 0.1
  dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrP11ABK:bd07/15/2015:svnSAMSUNGELECTRONICSCO.,LTD.:pn900X3C/900X3D/900X3E/900X4C/900X4D:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rnNP900X3E-A01ES:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1:
  dmi.product.name: 900X3C/900X3D/900X3E/900X4C/900X4D
  dmi.product.version: 0.1
  dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD.

-- 
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/1504914

Title:
  System freeze/restart on high memory usage

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  What is expected to happen is when all RAM and swap is either nearly
  or fully consumed by a process or application, the OS remains
  responsive, it doesn't crash to the login screen, and eventually the
  process or application asking for the majority of resources is force
  closed.

  What happens instead is the mouse stops responding promptly or not at
  all, and eventually the system resets to the logon screen.

  Specific scenarios to reproduce:
  - First, when having several chrome tabs open, press CTRL+T several times and arrive to a memory limit.
  - Second, I experience this when using virtualbox, given that the VM was asking for half of the memory available, as soon as I open a couple of tabs in chrome in the host the system started to be unusable.
  - Third, to reproduce it easily I've installed memtester application and run a couple of instances of it asking 2G chunks, this effectively reproduce the crash very effectively.

  I've checked:
  - All 4GB of memory passed memtest86+.
  - Tested with and without 4GB swap file same crash.

  Untested: Adding in /etc/rc.local :
  sysctl vm.vfs_cache_pressure=100000

  WORKAROUND: By adding into /etc/sysctl.conf the following, I'm not losing control of the system even if it slows down when ramping up the swap use:
  vm.min_free_kbytes=131072
  vm.swappiness=5

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-65-generic 3.13.0-65.106
  ProcVersionSignature: Ubuntu 3.13.0-65.106-generic 3.13.11-ckt26
  Uname: Linux 3.13.0-65-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.15
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  yas        3625 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Sun Oct 11 10:41:41 2015
  InstallationDate: Installed on 2015-01-17 (266 days ago)
  InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
  MachineType: SAMSUNG ELECTRONICS CO., LTD. 900X3C/900X3D/900X3E/900X4C/900X4D
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-65-generic.efi.signed root=UUID=c5d1dcf0-367e-4643-99f9-735befcdaba1 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-65-generic N/A
   linux-backports-modules-3.13.0-65-generic  N/A
   linux-firmware                             1.127.15
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 07/15/2015
  dmi.bios.vendor: Phoenix Technologies Ltd.
  dmi.bios.version: P11ABK
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: NP900X3E-A01ES
  dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD.
  dmi.board.version: FAB1
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 9
  dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD.
  dmi.chassis.version: 0.1
  dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrP11ABK:bd07/15/2015:svnSAMSUNGELECTRONICSCO.,LTD.:pn900X3C/900X3D/900X3E/900X4C/900X4D:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rnNP900X3E-A01ES:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1:
  dmi.product.name: 900X3C/900X3D/900X3E/900X4C/900X4D
  dmi.product.version: 0.1
  dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD.

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