Re: [Fwd: [RFT] major libata update]

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James Bottomley wrote:
On Wed, 2006-05-17 at 11:06 -0400, Jeff Garzik wrote:
storage device and storage host are key objects included in the

This is one of the questions.  Currently block has no concept of "host".
All it knows about are queues (which may be per host or per device
depending on the implementation).  Do we need to introduce the concept
of something like queue grouping (a sort of lightweight infrastructure
that could be used by the underlying transport to implement a host
concept without introducing hosts at the block layer)?

Boy, this sounds interesting. Could also be a more sane way to implement
can_queue depths for the host.  Another thing comes to mind - queue depths
per target, which has always been missing from Linux. Although, any
grouping immediately brings to mind scheduling policies within the group.

-- james s
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