Re: [PATCH] SCSI driver for VMware's virtual HBA.

From: Matthew Wilcox
Date: Tue Sep 01 2009 - 12:16:58 EST

On Tue, Sep 01, 2009 at 09:12:43AM -0700, Roland Dreier wrote:
> I'm not really sure we should be trying to force drivers to share just
> because they are paravirtualized -- if there is real commonality, then
> sure put it in common code, but different hypervisors are probably as
> different as different hardware.

I really disagree. This kind of virtualised drivers are pretty much
communication protocols, and not hardware. As such, why design a new one?
If there's an infelicity in the ibmvscsi protocol, it makes sense to
design a new one. But being different for the sake of being different
is just a way to generate a huge amount of make-work.

Matthew Wilcox Intel Open Source Technology Centre
"Bill, look, we understand that you're interested in selling us this
operating system, but compare it to ours. We can't possibly take such
a retrograde step."
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