With the kernel 3.13.0-41-generic, I can confirm that we are now able to run warm and cold resets of the mc via ipmitool correctly. On previous kernel those commands would cause kipmi to use 100% cpu time and require the ipmi modules to be unloaded and reloaded before ipmitool would operate correctly. With this kernel once the mc is reset, ipmitool works properly. This would seem to fix the issue for us, but we're not the original bug reporter.
-- 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/1383921 Title: kipmi0 process hangs with ipmitool Status in linux package in Ubuntu: In Progress Status in linux source package in Precise: Invalid Status in linux source package in Trusty: Fix Committed Status in linux source package in Utopic: In Progress Status in linux source package in Vivid: In Progress Bug description: we're in the process of migrating from 12.04 to 14.04 and are noticing a problem apparently related to the kernel and ipmi. after an indeterminate period of regular ipmi queries (e.g., nagios checks using ipmitool) the kipmi0 process pegs a cpu to ~100% usage and further ipmitool commands hang. the former is not a huge problem as the process is niced and its cpu usage can be limited using the /sys/module/ipmi_si/parameters/kipmid_max_busy_us interface. however, ipmitool's hanging severely degrades hardware monitoring. this problem initially reared its head in our enviroment on a handful of 12.04 hosts on which hwe kernels were installed. of the dozen deployed 14.04 hosts, four have started displaying these symptoms in the past week. all of the 12.04+hwe hosts were eventually affected; i believe that given enough time all of the 14.04 hosts would be, as well. a reboot clears it up until its recurrence. red hat has a bug logged that appears to match this: https://bugzilla.redhat.com/show_bug.cgi?id=1090619 unfortunately the work-around and proposed fix (from a duplicate bug) are currently non- public. it does look like they were able to identify the "ipmi: simplify locking" patch from commit id f60adf42ad55405d1b17e9e5c33fdb63f1eb8861 as the culprit. i have just finished building a kernel from linux-source-3.13.0=3.13.0-37.64 w/this patch reversed and will deploy it to see if the problem is alleviated. thank you for your time and effort. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-37-generic 3.13.0-37.64 ProcVersionSignature: Ubuntu 3.13.0-37.64-generic 3.13.11.7 Uname: Linux 3.13.0-37-generic x86_64 AlsaDevices: total 0 crw-rw---- 1 root audio 116, 1 Oct 18 13:11 seq crw-rw---- 1 root audio 116, 33 Oct 18 13:11 timer AplayDevices: aplay: device_list:268: no soundcards found... ApportVersion: 2.14.1-0ubuntu3.5 Architecture: amd64 ArecordDevices: arecord: device_list:268: no soundcards found... AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: CRDA: Error: [Errno 2] No such file or directory: 'iw' Date: Tue Oct 21 12:55:43 2014 IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig' MachineType: Supermicro X8DT6 PciMultimedia: ProcEnviron: TERM=rxvt-unicode-256color PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/usr/bin/zsh ProcFB: ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-37-generic root=/dev/md0 ro consoleblank=0 console=tty0 console=ttyS2,115200n8 nomdmonddf nomdmonisw bootdegraded=true RelatedPackageVersions: linux-restricted-modules-3.13.0-37-generic N/A linux-backports-modules-3.13.0-37-generic N/A linux-firmware 1.127.7 RfKill: Error: [Errno 2] No such file or directory: 'rfkill' SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 05/15/2012 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 2.0c dmi.board.asset.tag: 1234567890 dmi.board.name: X8DT6 dmi.board.vendor: Supermicro dmi.board.version: 1234567890 dmi.chassis.asset.tag: To Be Filled By O.E.M. dmi.chassis.type: 17 dmi.chassis.vendor: Supermicro dmi.chassis.version: 1234567890 dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr2.0c:bd05/15/2012:svnSupermicro:pnX8DT6:pvr1234567890:rvnSupermicro:rnX8DT6:rvr1234567890:cvnSupermicro:ct17:cvr1234567890: dmi.product.name: X8DT6 dmi.product.version: 1234567890 dmi.sys.vendor: Supermicro To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1383921/+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
