apport information ** Tags added: apport-collected
** Description changed: OS provided by AKS is currently Ubuntu 16.04.6 LTS, kernel 4.15.0-1077-azure. Every block written by a k8s pod to a ceph CSI volume generates 2 warning lines in the node's system logs (kern.log, syslog, messages, warn): "Apr 24 09:37:46 aks-<nodename> kernel: [242123.654538] ceph: Failed to find inode for 1" Under production load, eventually the node succumbs to DiskPressure as the drive fills up. Also performance is noticeably degraded. Background here: https://tracker.ceph.com/issues/45283 Luis Hernandez indicates 4 commits relating to this issue, just 2 of which have been backported to Ubuntu 16. d557c48db730 ("ceph: quota: add counter for snaprealms with quota") <== e3161f17d926 ("ceph: quota: cache inode pointer in ceph_snap_realm") 0eb6bbe4d9cf ("ceph: fix root quota realm check") <== 2596366907f8 ("ceph: don't check quota for snap inode") Quoth Luis: "I've done a quick test and, after compiling the bionic kernel 4.15.0-96.97 (the latest released), I can reproduce the issue. Cherry-picking the 2 missing commits (2596366907f8 and e3161f17d926) fixes it." In my testing Ubuntu 18 does not exhibit the bug, but Azure support tells me it will be months before they make it GA in AKS. Can we get those commits backported to Ubuntu 16? ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-azure (not installed) ProcVersionSignature: Ubuntu 4.15.0-1077.82-azure 4.15.18 Uname: Linux 4.15.0-1077-azure x86_64 ApportVersion: 2.20.1-0ubuntu2.23 Architecture: amd64 Date: Wed Apr 29 12:45:12 2020 ProcEnviron: TERM=xterm-256color PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: linux-meta-azure UpgradeStatus: No upgrade log present (probably fresh install) + --- + AlsaDevices: Error: command ['ls', '-l', '/dev/snd/'] failed with exit code 2: ls: cannot access '/dev/snd/': No such file or directory + AplayDevices: Error: [Errno 2] No such file or directory + ApportVersion: 2.20.1-0ubuntu2.23 + Architecture: amd64 + ArecordDevices: Error: [Errno 2] No such file or directory + CRDA: N/A + DistroRelease: Ubuntu 16.04 + IwConfig: Error: [Errno 2] No such file or directory + Lsusb: Error: command ['lsusb'] failed with exit code 1: + MachineType: Microsoft Corporation Virtual Machine + Package: linux-azure-4.15 + PciMultimedia: + + ProcEnviron: + TERM=xterm-256color + PATH=(custom, no user) + LANG=en_US.UTF-8 + SHELL=/bin/bash + ProcFB: 0 hyperv_fb + ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-1082-azure root=UUID=026eedeb-bd55-4fe3-9e65-0f5f76c13202 ro console=tty1 console=ttyS0 earlyprintk=ttyS0 rootdelay=300 + ProcVersionSignature: Ubuntu 4.15.0-1082.92~16.04.1-azure 4.15.18 + RelatedPackageVersions: + linux-restricted-modules-4.15.0-1082-azure N/A + linux-backports-modules-4.15.0-1082-azure N/A + linux-firmware N/A + RfKill: Error: [Errno 2] No such file or directory + Tags: xenial uec-images xenial uec-images + Uname: Linux 4.15.0-1082-azure x86_64 + UpgradeStatus: No upgrade log present (probably fresh install) + UserGroups: + + _MarkForUpload: True + dmi.bios.date: 06/02/2017 + dmi.bios.vendor: American Megatrends Inc. + dmi.bios.version: 090007 + dmi.board.name: Virtual Machine + dmi.board.vendor: Microsoft Corporation + dmi.board.version: 7.0 + dmi.chassis.asset.tag: 7783-7084-3265-9085-8269-3286-77 + dmi.chassis.type: 3 + dmi.chassis.vendor: Microsoft Corporation + dmi.chassis.version: 7.0 + dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr090007:bd06/02/2017:svnMicrosoftCorporation:pnVirtualMachine:pvr7.0:rvnMicrosoftCorporation:rnVirtualMachine:rvr7.0:cvnMicrosoftCorporation:ct3:cvr7.0: + dmi.product.name: Virtual Machine + dmi.product.uuid: 2B0B428F-CF5B-3142-8500-028AFD70E74B + dmi.product.version: 7.0 + dmi.sys.vendor: Microsoft Corporation ** Attachment added: "AudioDevicesInUse.txt" https://bugs.launchpad.net/bugs/1875884/+attachment/5370855/+files/AudioDevicesInUse.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1875884 Title: Kernel log flood "ceph: Failed to find inode for 1" To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1875884/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
