Did this issue start happening after an update/upgrade? Was there a prior kernel version where you were not having this particular problem?
Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.15 kernel[0]. If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'. If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'. Once testing of the upstream kernel is complete, please mark this bug as "Confirmed". Thanks in advance. [0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.15-rc8 ** Changed in: linux (Ubuntu) Importance: Undecided => Medium ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete -- 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/1744109 Title: Kernel Bug When High Memory Usage Status in linux package in Ubuntu: Incomplete Bug description: Dmesg shows that there is a kernel bug [825979.477960] /build/linux-SwhOyu/linux-4.4.0/mm/pgtable-generic.c:33: bad pmd ffff8809452bcc00(0000000dc62009e2) [826927.570746] huge_memory: mapcount 0 page_mapcount 1 [826927.570920] ------------[ cut here ]------------ [826927.571060] kernel BUG at /build/linux-SwhOyu/linux-4.4.0/mm/huge_memory.c:1941! [826927.571300] invalid opcode: 0000 [#1] SMP At the same time, we observed high memory usage. (I'm not sure which is the cause, in other words, high memory usage causes this bug or this bug causes high memory usage) $uname -a Linux sat-10 4.4.0-104-generic #127-Ubuntu SMP Mon Dec 11 12:16:42 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-104-generic 4.4.0-104.127 ProcVersionSignature: Ubuntu 4.4.0-104.127-generic 4.4.98 Uname: Linux 4.4.0-104-generic x86_64 AlsaDevices: total 0 crw-rw---- 1 root audio 116, 1 Jan 8 15:21 seq crw-rw---- 1 root audio 116, 33 Jan 8 15:21 timer AplayDevices: Error: [Errno 2] No such file or directory: 'aplay' ApportVersion: 2.20.1-0ubuntu2.15 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: Thu Jan 18 10:39:00 2018 HibernationDevice: RESUME=/dev/mapper/satx--vg-swap_1 InstallationDate: Installed on 2017-12-19 (30 days ago) InstallationMedia: Ubuntu-Server 16.04.3 LTS "Xenial Xerus" - Release amd64 (20170801) IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig' Lsusb: Bus 002 Device 002: ID 8087:8002 Intel Corp. Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 001 Device 003: ID 413c:a001 Dell Computer Corp. Hub Bus 001 Device 002: ID 8087:800a Intel Corp. Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub MachineType: Dell Inc. PowerEdge T630 PciMultimedia: ProcEnviron: TERM=xterm PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 EFI VGA ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-104-generic.efi.signed root=/dev/mapper/satx--vg-root ro RelatedPackageVersions: linux-restricted-modules-4.4.0-104-generic N/A linux-backports-modules-4.4.0-104-generic N/A linux-firmware 1.157.14 RfKill: Error: [Errno 2] No such file or directory: 'rfkill' SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 08/17/2017 dmi.bios.vendor: Dell Inc. dmi.bios.version: 2.5.4 dmi.board.name: 0NT78X dmi.board.vendor: Dell Inc. dmi.board.version: A06 dmi.chassis.type: 17 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr2.5.4:bd08/17/2017:svnDellInc.:pnPowerEdgeT630:pvr:rvnDellInc.:rn0NT78X:rvrA06:cvnDellInc.:ct17:cvr: dmi.product.name: PowerEdge T630 dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1744109/+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
