I confirm as well that this problem persists on Ubuntu 13.10, or more precisely : [ 0.000000] Linux version 3.11.0-13-generic (buildd@roseapple) (gcc version 4.8.1 (Ubuntu/Linaro 4.8.1-10ubuntu8) ) #20-Ubuntu SMP Wed Oct 23 07:38:26 UTC 2013 (Ubuntu 3.11.0-13.20-generic 3.11.6)
It appears once in a while - about every second day. Last time it appeared it was today when I plugged in my external Hard-Drive and logged in afterwards to my allready opened session. If this happens, there is not much to do about, just reboot and the problem goes away then but I'm quite reluctant to do it. Tried to kill it or relaunch the x-server as I thought this process is part of it. But that seems not to be the case. What are kworkers ? What are they good for? Do they manage the CPU? This might be the case as I see 3 times 8 of them enumerated from 0 to 7 and four prefixed with u this would correspond the 8 virtual cores and the 4 real ones present on my CPU. Might it be possible that there is a race-condition on one of the cores that puts it to an endless-loop (instead of just letting it die or blocking it for example)? -- 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/887793 Title: Kworker constantly taking about 100% CPU Status in The Linux Kernel: Confirmed Status in “linux” package in Ubuntu: Confirmed Status in “linux” package in Arch Linux: New Status in “linux” package in Suse: New Bug description: I've this issue since the latest Ubuntu 11.10 version, all updates applied till today, and it's still there. Ubuntu 11.04 did not have this issue. If I run top there is a Kworker constantly taking much CPU, I don't know how to research where this comes from. ProblemType: Bug DistroRelease: Ubuntu 11.10 Package: linux-image-3.0.0-12-generic 3.0.0-12.20 ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4 Uname: Linux 3.0.0-12-generic i686 AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24. AplayDevices: **** List of PLAYBACK Hardware Devices **** card 0: Intel [HDA Intel], device 0: AD198x Analog [AD198x Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 ApportVersion: 1.23-0ubuntu4 Architecture: i386 ArecordDevices: **** List of CAPTURE Hardware Devices **** card 0: Intel [HDA Intel], device 0: AD198x Analog [AD198x Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: kp 1473 F.... pulseaudio CRDA: Error: [Errno 2] Bestand of map bestaat niet Card0.Amixer.info: Card hw:0 'Intel'/'HDA Intel at 0xe4404000 irq 46' Mixer name : 'Analog Devices AD1981' Components : 'HDA:11d41981,103c30c0,00100200 HDA:11c11040,103c1378,00100200' Controls : 11 Simple ctrls : 9 Date: Tue Nov 8 22:29:10 2011 HibernationDevice: RESUME=UUID=ad8d4a18-9fe4-4246-ba44-85cf6b4dace5 InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111012) MachineType: Hewlett-Packard HP Compaq 6710b (GB891ET#ABH) PccardctlIdent: Socket 0: no product info available PccardctlStatus: Socket 0: no card ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-12-generic root=UUID=686d2155-83a9-4743-a2a4-8e9570ee3da6 ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.0.0-12-generic N/A linux-backports-modules-3.0.0-12-generic N/A linux-firmware 1.60 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 01/15/2009 dmi.bios.vendor: Hewlett-Packard dmi.bios.version: 68DDU Ver. F.15 dmi.board.name: 30C0 dmi.board.vendor: Hewlett-Packard dmi.board.version: KBC Version 71.2E dmi.chassis.asset.tag: CNU72913PH dmi.chassis.type: 10 dmi.chassis.vendor: Hewlett-Packard dmi.modalias: dmi:bvnHewlett-Packard:bvr68DDUVer.F.15:bd01/15/2009:svnHewlett-Packard:pnHPCompaq6710b(GB891ET#ABH):pvrF.15:rvnHewlett-Packard:rn30C0:rvrKBCVersion71.2E:cvnHewlett-Packard:ct10:cvr: dmi.product.name: HP Compaq 6710b (GB891ET#ABH) dmi.product.version: F.15 dmi.sys.vendor: Hewlett-Packard To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/887793/+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
