** Summary changed: - Computer unusable under memory pressure with no swap space + [Lenovo ThinkPad X220] Computer unusable under memory pressure with no swap space
-- 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/1390358 Title: [Lenovo ThinkPad X220] Computer unusable under memory pressure with no swap space Status in “linux” package in Ubuntu: Incomplete Bug description: I've a laptop with 8 gigabytes of RAM, an Intel SSD, and no swap partition (because I don't want to wear out my SSD). Since I upgraded to Ubuntu 14.10, about once a week my laptop suddenly goes into happy-swap-land: - HDD led is on all the time - windows stop redrawing - mouse cursor doesn't move (or moves about 1/2px per minute max) - CapsLock takes 60 seconds between keypress and the LED turning on I just had another episode and gave it 25 minutes to get better. It didn't. I had to Alt-SysRq-S,U,B to get back a working computer. I had `atop` installed, so I've snapshots of the system state taken every 10 minutes. These show sda being busy 100% of the time, reading 250 MB/s, with all the running processes being responsible for the reads (e.g. Skype read 13.5 GB of data in one 10 minute window). They also show the number of scanned pages jumped up to to 2744e5, and then up to1630e6 and stayed there. As far as I can tell, this means the kernel decided to free some pages and started evicting mapped library/executable pages which only got read back in the next instant because running programs need those pages to run. I've no idea why the OOM killer didn't kick in. I've no idea why the kernel didn't discard some pages from the page cache. atop shows the page cache was 4.1G during all that time and didn't go up or down. ProblemType: Bug DistroRelease: Ubuntu 14.10 Package: linux-image-3.16.0-25-generic 3.16.0-25.33 ProcVersionSignature: Ubuntu 3.16.0-25.33-generic 3.16.7 Uname: Linux 3.16.0-25-generic x86_64 ApportVersion: 2.14.7-0ubuntu8 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: mg 3394 F.... pulseaudio CurrentDesktop: GNOME Date: Fri Nov 7 10:10:44 2014 EcryptfsInUse: Yes HibernationDevice: RESUME=UUID=bf592a79-5f4e-486d-b69d-7525d492dcc6 InstallationDate: Installed on 2012-07-25 (834 days ago) InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425) Lsusb: Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub MachineType: LENOVO 4291WJF ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-25-generic root=UUID=36079681-53fc-4ca2-80ac-98321c07e8d2 ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.16.0-25-generic N/A linux-backports-modules-3.16.0-25-generic N/A linux-firmware 1.138 RfKill: 0: phy0: Wireless LAN Soft blocked: no Hard blocked: no SourcePackage: linux UpgradeStatus: Upgraded to utopic on 2014-10-24 (13 days ago) dmi.bios.date: 07/18/2013 dmi.bios.vendor: LENOVO dmi.bios.version: 8DET69WW (1.39 ) dmi.board.asset.tag: Not Available dmi.board.name: 4291WJF dmi.board.vendor: LENOVO dmi.board.version: Not Available dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Not Available dmi.modalias: dmi:bvnLENOVO:bvr8DET69WW(1.39):bd07/18/2013:svnLENOVO:pn4291WJF:pvrThinkPadX220:rvnLENOVO:rn4291WJF:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 4291WJF dmi.product.version: ThinkPad X220 dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1390358/+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
