[RFC PATCHv2 4/4] nvme-multipath: add debugfs attribute for adaptive I/O policy stat

[Daniel Wagner]

On Thu, Oct 16, 2025 at 08:14:19AM +0200, Hannes Reinecke wrote:
> > Currently queue_depth and numa_nodes attributes are created under
> > sysfs, so do you meant to move those attributes from sysfs to
> > debugfs?
> > 
> Yes. sysfs information can be perused by udev rules, and that assumes
> the information in there will not change without a 'CHANGE' uevent.
> So it's questionable whether volatile information like the queue depth
> or the round-robin path selection should be presented there.
> I'd rather have it moved into debugfs.
> 
> But that might be personal preference.

If this moves to debugfs, I think nvme-cli should not show it per
default. Don't want to get lots of questions why the value is not
showed or updated.