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 Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2077926 Title: crash in openzfs - 2.2.2 not supported on 6.8 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/zfs-linux/+bug/2077926/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
