Did this issue start happening after an update/upgrade? Was there a kernel version where you were not having this particular problem? This will help determine if the problem you are seeing is the result of a regression, and when this regression was introduced. If this is a regression, we can perform a kernel bisect to identify the commit that introduced the problem.
** Changed in: linux (Ubuntu) Importance: Critical => High ** Tags added: kernel-da-key -- 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/1460434 Title: System Freeze On Low Memory Status in linux package in Ubuntu: Incomplete Bug description: System freeze occurs when memory is almost full and there is no chance to kill processes. Everything is unresponsive, hdd is trashing, even ssh connection does not show any reaction. I set vm.swappiness = 1 to minimize swapping but those lock ups are still there. I think this could be related to disk caching. Few times I observed in iotop that several processes use %90+ disk I/O while memory is close to its limit. I increased vm.min_free_kbytes (default value was 65536) but not tested yet. Current disk scheduler is set to deadline. ProblemType: Bug DistroRelease: Ubuntu 15.04 Package: linux-image-3.19.0-18-generic 3.19.0-18.18 ProcVersionSignature: Ubuntu 3.19.0-18.18-generic 3.19.6 Uname: Linux 3.19.0-18-generic x86_64 ApportVersion: 2.17.2-0ubuntu1.1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: user 2571 F.... pulseaudio CurrentDesktop: LXDE Date: Sun May 31 16:29:04 2015 InstallationDate: Installed on 2014-11-15 (197 days ago) InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2) MachineType: Packard Bell ENNS44HR ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-18-generic root=UUID=88ea410e-70cc-49a6-b2b3-326fc63a4e7d ro quiet splash elevator=deadline RelatedPackageVersions: linux-restricted-modules-3.19.0-18-generic N/A linux-backports-modules-3.19.0-18-generic N/A linux-firmware 1.143.1 SourcePackage: linux UpgradeStatus: Upgraded to vivid on 2015-05-04 (27 days ago) dmi.bios.date: 04/28/2011 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: V1.23 dmi.board.asset.tag: No Asset Tag dmi.board.name: ENNS44HR dmi.board.vendor: Packard Bell dmi.board.version: V1.23 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: Packard Bell dmi.chassis.version: V1.23 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrV1.23:bd04/28/2011:svnPackardBell:pnENNS44HR:pvrV1.23:rvnPackardBell:rnENNS44HR:rvrV1.23:cvnPackardBell:ct9:cvrV1.23: dmi.product.name: ENNS44HR dmi.product.version: V1.23 dmi.sys.vendor: Packard Bell To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1460434/+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
