On Tue, 2007-11-20 at 16:07 +0100, Oliver Neukum wrote:
> Am Dienstag 20 November 2007 schrieb James Bottomley:
> > I don't understand why you want to do this.  Power management is a
> > layered issue on SCSI, divided (as always) into host, device and
> > transport.  The idle you're talking about is a pure device thing, so it
> > can be managed by the ULD (and currently is).  When a unit is stopped,
> 
> The lower layers don't know how to correctly suspend a device. sd_suspend()
> may know how to do it. It would also mean the LLD having to detect idleness.

You really mean you want to involve the transport as well, right?  So
ipso facto this is more than simple idleness management.  Thus, you
really need to look into the full solution (host, transport and ULD).

James


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