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Date: Mon, 24 Jun 2002 20:32:15 +0200 (CEST)
From: Roman Zippel <zippel@linux-m68k.org>
X-X-Sender: roman@serv
To: "Grover, Andrew" <andrew.grover@intel.com>
cc: "'David Brownell'" <david-b@pacbell.net>,
       "'Nick Bellinger'" <nickb@attheoffice.org>,
       <linux-kernel@vger.kernel.org>, <linux-scsi@vger.kernel.org>,
       Patrick Mochel <mochel@osdl.org>
Subject: RE: driverfs is not for everything! (was:  [PATCH] /proc/scsi/map
 )
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Hi,

On Mon, 24 Jun 2002, Grover, Andrew wrote:

> With technologies like USB, infiniband, NFS, iSCSI, and 1394, it's tough,
> but the main question should be:
>
> "If my computer suspends, should this device be turned off?" Which is
> another way of asking is the use of a device exclusive to a particular
> machine.
>
> If a device can be accessed by multiple machines concurrently, it should not
> be in driverfs.

I don't think it's that easy. If the computer wakes up again, devices have
to be reinitialised in the right order, e.g. iSCSI needs a working network
stack and devices. Another problem is how to properly shutdown the
machine. Scripts now "know" that nfs requires the network, but how does
the script find out, that /dev/sdb2 is an iSCSI device, so that it can
properly unmount the device, before the network is shutdown?

bye, Roman

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