Re: [PATCH] enclosure: add support for enclosure services

From: Luben Tuikov
Date: Tue Feb 12 2008 - 14:45:59 EST

--- On Tue, 2/12/08, Kristen Carlson Accardi <kristen.c.accardi@xxxxxxxxx> wrote:
> Hi,
> I apologize for taking so long to review this patch. I
> obviously agree
> wholeheartedly with Luben. The problem I ran into while
> trying to
> design an enclosure management interface for the SATA
> devices is that
> there is all this vendor defined stuff. For example, for
> the AHCI LED
> protocol, the only "defined" LED is
> 'activity'. For LED2 and LED3 it
> is up to hardware vendors to define these. For SGPIO
> there's all kinds
> of ways for hw vendors to customize. I felt that it was
> going to be a
> maintainance nightmare to have to keep track of various
> vendors
> enclosure implementations in the ahci driver, and that
> it'd be better
> to just have user space libraries take care of that. Plus,
> that way a
> vendor doesn't have to get a patch into the kernel to
> get their new
> spiffy wizzy bang blinky lights working (think of how long
> it takes
> something to even get into a vendor kernel, which is what
> these guys
> care about...). So I'm still not sold on having an
> enclosure
> abstraction in the kernel - at least for the SATA
> controllers.

And I agree wholeheartedly with Kristen.


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