Public bug reported: On bionic kernel with btrfs mounted, kernfs_node_cache grows constantly.
About 7MB/hour of unreclaimable memory growth was observed on my x86_64 system with btrfs root partition, kernel 4.15.0-48-generic #51-Ubuntu SMP Wed Apr 3 08:28:49 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux. * disco is not affected. (kernel 5.0.0-13-generic) * bionic without btrfs is not affected. (on ext4 root partition) Possible related commit regarding memory leak found here https://github.com/torvalds/linux/commit/55237a5f2431a72435e3ed39e4306e973c0446b7 ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: linux-image-4.15.0-48-generic 4.15.0-48.51 ProcVersionSignature: Ubuntu 4.15.0-48.51-generic 4.15.18 Uname: Linux 4.15.0-48-generic x86_64 AlsaDevices: total 0 crw-rw---- 1 root audio 116, 1 May 9 21:39 seq crw-rw---- 1 root audio 116, 33 May 9 21:39 timer AplayDevices: Error: [Errno 2] No such file or directory: 'aplay': 'aplay' ApportVersion: 2.20.9-0ubuntu7.6 Architecture: amd64 ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord': 'arecord' AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: Date: Fri May 10 01:15:58 2019 HibernationDevice: RESUME=/dev/mapper/ctl-swap InstallationDate: Installed on 2017-03-19 (781 days ago) InstallationMedia: Ubuntu-Server 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719) IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig': 'iwconfig' Lsusb: Bus 001 Device 002: ID 0627:0001 Adomax Technology Co., Ltd Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub MachineType: QEMU Standard PC (i440FX + PIIX, 1996) PciMultimedia: ProcEnviron: TERM=screen-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 cirrusdrmfb ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.15.0-48-generic root=/dev/mapper/ctl-root ro rootflags=subvol=@ RelatedPackageVersions: linux-restricted-modules-4.15.0-48-generic N/A linux-backports-modules-4.15.0-48-generic N/A linux-firmware 1.173.5 RfKill: Error: [Errno 2] No such file or directory: 'rfkill': 'rfkill' SourcePackage: linux UpgradeStatus: Upgraded to bionic on 2018-05-11 (362 days ago) dmi.bios.date: 04/01/2014 dmi.bios.vendor: SeaBIOS dmi.bios.version: rel-1.11.2-0-gf9626ccb91-prebuilt.qemu-project.org dmi.chassis.type: 1 dmi.chassis.vendor: QEMU dmi.chassis.version: pc-i440fx-3.0 dmi.modalias: dmi:bvnSeaBIOS:bvrrel-1.11.2-0-gf9626ccb91-prebuilt.qemu-project.org:bd04/01/2014:svnQEMU:pnStandardPC(i440FX+PIIX,1996):pvrpc-i440fx-3.0:cvnQEMU:ct1:cvrpc-i440fx-3.0: dmi.product.name: Standard PC (i440FX + PIIX, 1996) dmi.product.version: pc-i440fx-3.0 dmi.sys.vendor: QEMU ** Affects: linux (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug bionic -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1828438 Title: btrfs memory leak on bionic To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1828438/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
