I have been experiencing random process crashes and kernel panics ever since I upgraded to 24.04. The first was due to a btrfs bug (https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2080039), but they've continued even after the fix for that was released, although much less frequently.
The crashes seem to generally occur when the system is under I/O pressure, on both ZFS and non-ZFS filesystems. Used memory is <6GB/16GB, but the remainder is basically all used for disk caching - so it's effectively under memory pressure as well. I set up kdump after the first crash I got since the above bug was fixed, and figured out how to do basic dump analysis. From what I can tell, the kernel panics are either page fault related, or illegal operation exceptions (i.e. memory corruption). The process crashes are always for the process causing the high disk usage (a python downloader script), and are either SIGILL's or SIGSEGV's. >From a comment above I've just found https://github.com/canonical/lxd/issues/14178#issuecomment-2402322735, and have now enabled both KFENCE and SLUB debugging, so we'll see if I get any dmesg error messages. So that is all to say, an upgrade to 2.2.6 on noble would be very much appreciated. I'd also be happy to test anything and try to force a crash. Thanks! ** Bug watch added: LXD bug tracker #14178 https://github.com/canonical/lxd/issues/14178 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to zfs-linux in Ubuntu. https://bugs.launchpad.net/bugs/2077926 Title: crash in openzfs - 2.2.2 not supported on 6.8 Status in zfs-linux package in Ubuntu: Confirmed Bug description: Crash report on openzfs: https://github.com/openzfs/zfs/issues/16482 > You should probably report this to Ubuntu or try it on 2.2.5 vanilla, 2.2.2 doesn't claim to work on 6.8 Distribution Version 24.04 Kernel Version 6.8.0-41-generic Architecture intel x86-64 OpenZFS Version zfs-2.2.2-0ubuntu9, zfs-kmod-2.2.2-0ubuntu9 ProblemType: Bug DistroRelease: Ubuntu 24.04 Package: zfsutils-linux 2.2.2-0ubuntu9 ProcVersionSignature: Ubuntu 6.8.0-41.41-generic 6.8.12 Uname: Linux 6.8.0-41-generic x86_64 NonfreeKernelModules: zfs ApportVersion: 2.28.1-0ubuntu3.1 Architecture: amd64 CasperMD5CheckResult: pass Date: Mon Aug 26 21:30:11 2024 InstallationDate: Installed on 2024-08-16 (11 days ago) InstallationMedia: Ubuntu 24.04 LTS "Noble Numbat" - Release amd64 (20240424) ProcEnviron: LANG=en_US.UTF-8 PATH=(custom, no user) SHELL=/bin/bash TERM=xterm-256color XDG_RUNTIME_DIR=<set> SourcePackage: zfs-linux UpgradeStatus: No upgrade log present (probably fresh install) modified.conffile..etc.sudoers.d.zfs: [inaccessible: [Errno 13] Permission denied: '/etc/sudoers.d/zfs'] To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/zfs-linux/+bug/2077926/+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
