On 20/09/2021 10:48, David Sterba wrote:

I found the following lockdep report, it's been with recent misc-next
and the functions on stack match what this patch touches but I haven't
done a deeper analysis so this could be a false trace (though the
warning seems legit).

The workload was some file creation/copy and relocation but I don't have
a more specific information.

This looks very much like a lockdep splat I know from zoned mode, but assumed
it's a zoned only problem and pushed on the task stack. Was this test on a 
regular SCSI/SATA drive?