Re: [DO NOT APPLY] sd take advantage of rotation speed

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On Wed, Jun 25 2008, Martin K. Petersen wrote:
> >>>>> "Jens" == Jens Axboe <jens.axboe@xxxxxxxxxx> writes:
> 
> Jens> Uhm, but it IS "a blatant layering violation", it's doing things
> Jens> from the wrong side up :-)
> 
> I also disagree with mucking with the elevator directly in sd.c.
> 
> The whole point of my I/O hints work is to expose the I/O topology in
> a generic fashion so that upper layers can take advantage of them.
> 
> I'll post a new batch of those patches shortly...

Good, that sounds useful! Sounds a lot like what I referred to as
'device profiles'.

-- 
Jens Axboe

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