--- Linus Torvalds <torvalds@xxxxxxxx> wrote:
> On Wed, 17 May 2006, James Bottomley wrote:
> >
> > This is one of the questions. Currently block has no concept of "host".
>
> That's good.
>
> I don't understand why you'd ever _want_ a concept of "host". The whole
> concept is broken and unnecessary. At no point should you even need to map
> from request to host, but if you do, you don't need to introduce any
> generic "host" notion, you can do it easily per-queue.
You are correct. The concept of "host" should NOT be exported to
higher than PCI/SCSI* level.
* See below.
> The whole fixation with "host" in the SCSI layer is a bug, I think. What
> does it matter, really? And when do you actually have a "request_queue"
> entry without already knowing which controller it is connected to (ie why
> do you even need that mapping)?
Not quite, the concept of a "host" is needed as it is the "host" which
provides "SCSI ports" to the "SCSI domain".
Luben
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