On 2020-06-22 05:27, Luis Chamberlain wrote: > Note: this will bring you sanity if you try to figure out *why* we still > get: > > [235530.144343] debugfs: Directory 'loop0' with parent 'block' already present! > [235530.149477] blktrace: debugfs_dir not present for loop0 so skipping > [235530.232328] debugfs: Directory 'loop0' with parent 'block' already present! > [235530.238962] blktrace: debugfs_dir not present for loop0 so skipping > > If you run run_0004.sh from break-blktrace [0]. Even with all my patches > merged we still run into this. And so the bug lies within the block > layer or on the driver. I haven't been able to find the issue yet. > > [0] https://github.com/mcgrof/break-blktrace Thanks Luis for having shared this information. If I can find the time I will have a look into this myself. Bart.