Re: Aic7xxx v6.2.22 and Aic79xx v1.3.0Alpha2 Released

["Justin T. Gibbs" <gibbs@scsiguy.com>]

> Btw, people who want to learn about how to design and maintain a smart
> driver interface that can evolve gracefully without breaking driver
> zillions of times should ask Justin how it does this so well with
> FreeBSD/CAM, in my opinion.
> 
>   Gérard.

Gerard,

The whole reason CAM has been sucessful was that the decision was made,
however painful it was, to completely redo a subsystem to fix the blatent
architectural flaws in it.  CAM was only integrated once all of the drivers
were ported and it had received extensive external testing.  I don't know
that I or anyone else can do much better with the Linux SCSI layer until
such time that someone decides to just nuke the whole thing and start over.
A hack, on top of a hack, on top of a hack is no way to build a solid 
foundation.  What's even more frustrating for me is that the hacks show up
in places you never expect and in forms that don't warn you if you are out
of compliance with the "new hack".  It makes it very difficult to follow
interface changes successfully.

--
Justin

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