Re: [Ksummit-discuss] [MAINTAINERS SUMMIT] Moving debugfs file systems into sysfs

[Greg Kroah-Hartman <gregkh@linuxfoundation.org>]

On Wed, Oct 03, 2018 at 03:44:37PM +0200, Jiri Kosina wrote:
> On Wed, 3 Oct 2018, Greg Kroah-Hartman wrote:
> 
> > > Not really. We need those configs to be enabled to be able to troubleshoot
> > > customer's problems - e.g., asking customer to enable some trace points or
> > > show some stats from debugfs is pretty common...
> > 
> > trace points should not be in debugfs.  And what stats are in debugfs
> > that are not availble in other tools?  If you rely on them, shouldn't we
> > move them to a "stable" location so that they can always be accessed?
> 
> So I for example quite often make use of the HID debugfs entries both for 
> reading the descriptor, and also for analyzing the parsed events (which 
> appear there as well).

for descriptors, both usb and pci expose them through other means that
are always present, perhaps you want to do the same thing for hid?

> Surely it can be moved whereever else (where?), but it seems to fit to 
> debugfs (it's used solely to debug dysfunctional devices / linux with 
> those devices), and provides exactly the data you need from the owner of 
> the system to provide in order to be able to debug remotely.

hidfs might be needed to match usbfs :)

thanks,

greg k-h