Re: ioctls, etc. (was Re: [PATCH 1/4] sas: add flag for locally attachedPHYs)

[Luben Tuikov]

On 10/21/05 14:04, Christoph Hellwig wrote:
>>How about this: Why not as a char device?
> 
> you can implement a char device using the block layer.  See
> drivers/scsi/{ch.c,osst.c,sg.c,st.c} for examples.

Christoph, you failed to see that my question was _rhetorical_.

> That beeing said I tried this approach.  It looks pretty cool when you
> think about it, but the block layer is quite a bit too heavyweight for
> queueing up a few SMP requests, and we need to carry too much useless
> code around for it.

That's the last reason not to implement SMP as a block device.
But this is good that you tried it and it "flopped".  This way
people will stop repeating "SMP... block device".

	Luben
-- 
http://linux.adaptec.com/sas/
http://www.adaptec.com/sas/
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