I experience the same on desktop (15.04) maybe once a week. I presume that this happens when some laking application starts to eat up all the memory quickly. When this happens the whole machine gets unresponsive immediately and only restarting helps. It only turns out from the atop logs what happened after the machine was restarted. Atop is configured to run every 30 secs. It is visible from the atop logs that kswapd0 is eating up all the cpu resources. Strange thing is that this happens despite there is no swap enabled.
I suppose what should happen is that the kernel OOMs and kills some application and everything is back to normal. What happens though is that the machine dies. Of course every unsaved work and open windows and applications are lost, which is very unfortunate. -- 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/1462919 Title: kswapd pulls server down every 2 weeks. Status in linux package in Ubuntu: Incomplete Bug description: in 15.04 even when having plenty of RAM and swap kswpd uses lots of CPU and might bring the machine down to a crawl making is unable to access it over the network. I say "might", because it's only a very clear feeling that I have. I do not know it for sure. Anyway the fact is that I have two server that once every 2 week ends up totally unaccessible from the network. They can be pinged though. Logging in locally takes a long time. Rebooting them locally takes a long time. They have absolutely no noticeable disk IO when in this stalled state. ProblemType: Bug DistroRelease: Ubuntu 15.04 Package: linux-image-3.19.0-16-generic 3.19.0-16.16 ProcVersionSignature: Ubuntu 3.19.0-18.18-generic 3.19.6 Uname: Linux 3.19.0-18-generic x86_64 AlsaDevices: total 0 crw-rw---- 1 root audio 116, 1 jun 8 09:57 seq crw-rw---- 1 root audio 116, 33 jun 8 09:57 timer AplayDevices: Error: [Errno 2] No such file or directory: 'aplay' ApportVersion: 2.17.2-0ubuntu1.1 Architecture: amd64 ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord' AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: Date: Mon Jun 8 10:02:44 2015 HibernationDevice: RESUME=UUID=17183f57-6587-47f2-84dc-553f7e5cf3a8 IwConfig: eth0 no wireless extensions. eth1 no wireless extensions. lo no wireless extensions. MachineType: Intel Corporation S5520UR PciMultimedia: ProcFB: 0 VESA VGA ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-18-generic root=/dev/mapper/vg0-root ro nomdmonddf nomdmonisw crashkernel=384M-:128M nomdmonddf nomdmonisw crashkernel=384M-:128M nomdmonddf nomdmonisw crashkernel=384M-:128M nomdmonddf nomdmonisw crashkernel=384M-:128M nomdmonddf nomdmonisw crashkernel=384M-:128M 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 RfKill: Error: [Errno 2] No such file or directory: 'rfkill' SourcePackage: linux UpgradeStatus: Upgraded to vivid on 2015-05-16 (22 days ago) dmi.bios.date: 12/17/2009 dmi.bios.vendor: Intel Corp. dmi.bios.version: S5500.86B.01.00.0046.121720091524 dmi.board.asset.tag: .................... dmi.board.name: S5520UR dmi.board.vendor: Intel Corporation dmi.board.version: E22554-606 dmi.chassis.asset.tag: .................... dmi.chassis.type: 23 dmi.chassis.vendor: ............................... dmi.chassis.version: .................. dmi.modalias: dmi:bvnIntelCorp.:bvrS5500.86B.01.00.0046.121720091524:bd12/17/2009:svnIntelCorporation:pnS5520UR:pvr....................:rvnIntelCorporation:rnS5520UR:rvrE22554-606:cvn...............................:ct23:cvr..................: dmi.product.name: S5520UR dmi.product.version: .................... dmi.sys.vendor: Intel Corporation To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1462919/+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
