There must be a better way to do this... All of these issues seem to arise from a BUG event in swapops.h:129. That particular spot is a section that's only active, when the kernel was built with CONFIG_MIGRATION=y. So first step is probably to verify that CONFIG_MIGRATION is even enabled for the mainline kernel (the configs are not the same, I'm told). So for all we know, the bug could still be upstream. If somebody running the mainline kernel could post the output of the following command, that would be useful:
cat /boot/config-$(uname -r) |grep CONFIG_MIGRATION If CONFIG_MIGRATION is enabled on mainline (CONFIG_MIGRATION=y in the output above), next step should be to check if some of the Ubuntu modifications touch in the source in any relevant places. The BUG event in swapops.h:129 seems to be hit if migration_entry_to_page() is called with an unlocked page. Grepping through the source, this function is only called from a handful of places, so it should be possible cross- reference with the Ubuntu modifications. Perhaps this will bring us closer to the problem a bit faster? -- 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/1674838 Title: kernel BUG at /build/linux- 7LGLH_/linux-4.10.0/include/linux/swapops.h:129 Status in linux package in Ubuntu: In Progress Status in linux source package in Zesty: In Progress Bug description: Randomly, khugepaged process will take 100% CPU, and I can only restart the computer to recover it. Relevant dmesg attached (dmesg_crash.txt). ProblemType: Bug DistroRelease: Ubuntu 17.04 Package: linux-image-4.10.0-14-generic 4.10.0-14.16 ProcVersionSignature: Ubuntu 4.10.0-14.16-generic 4.10.3 Uname: Linux 4.10.0-14-generic x86_64 ApportVersion: 2.20.4-0ubuntu2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: mathieu 2221 F.... pulseaudio /dev/snd/pcmC1D0p: mathieu 2221 F...m pulseaudio /dev/snd/controlC1: mathieu 2221 F.... pulseaudio CurrentDesktop: Unity:Unity7 Date: Tue Mar 21 23:03:23 2017 HibernationDevice: RESUME=UUID=67e78e4c-94ee-447c-ae60-4387dae296dd InstallationDate: Installed on 2016-01-31 (415 days ago) InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Alpha amd64 (20160131) MachineType: LENOVO 20344 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.10.0-14-generic root=UUID=b982929e-11d0-4984-885c-6c9daba24836 ro noprompt quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-4.10.0-14-generic N/A linux-backports-modules-4.10.0-14-generic N/A linux-firmware 1.164 SourcePackage: linux UpgradeStatus: Upgraded to zesty on 2017-03-02 (19 days ago) dmi.bios.date: 10/16/2014 dmi.bios.vendor: LENOVO dmi.bios.version: 96CN29WW(V1.15) dmi.board.asset.tag: 31900058WIN dmi.board.name: INVALID dmi.board.vendor: LENOVO dmi.board.version: 31900058WIN dmi.chassis.asset.tag: 31900058WIN dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Lenovo Yoga 2 13 dmi.modalias: dmi:bvnLENOVO:bvr96CN29WW(V1.15):bd10/16/2014:svnLENOVO:pn20344:pvrLenovoYoga213:rvnLENOVO:rnINVALID:rvr31900058WIN:cvnLENOVO:ct10:cvrLenovoYoga213: dmi.product.name: 20344 dmi.product.version: Lenovo Yoga 2 13 dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1674838/+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
