[cyphar]

That's funny, we have an internal bug open right now about a kernel panics that happen with devicemapper (with XFS as the base filesystem). We found that the issue was exacerbated if you used loopback devices, but on paper it should still happen in non-loopback mode (the current theory is that it's a bug in XFS). Our kernel team is still investigating the issue, but they cannot seem to reproduce the issue with direct-lvm (and loop-lvm is inconsistent in reproducing the issue).

If you can consistently reproduce the issue, would you mind providing the backtrace and/or coredump? Is it possible for you to reproduce the issue on a machine without needing to be hit by GitHub-levels of traffic, and if so can you provide said reproducer?

For reference, our backtraces show that the kernel dies at Xfs_vm_writepage. Though of course different kernel versions may have varying backtraces.

You can reach me on the email in my profile, or asarai(at)suse.com.