Re: driverfs is not for everything! (was: [PATCH] /proc/scsi/map )

[James Bottomley <James.Bottomley@steeleye.com>]

andrew.grover@intel.com said:
> If a device can be accessed by multiple machines concurrently, it
> should not be in driverfs. 

On that argument, we'll eliminate almost all Fibre Channel devices!

I think the qualification for appearing in driverfs is actually possessing a 
driver.  Therefore, we accept FC and iSCSI.  Things which appear as 
FileSystems are debatable, but not anything which has a real device driver.

> We need a device tree to do PM. If driverfs's PM capabilities are hurt
> because it doesn't stay true to that, then the featureitis has gone
> too far. 

Perhaps it's more a question of whether power management belongs as an every 
unit item in driverfs.  As you say, we get problems where the device is shared 
between multiple computers.

James