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SubjectRe: ORBS Elevator...
On Sat, 29 Jul 2000, Andrea Arcangeli wrote:

> On Sat, 29 Jul 2000, Andre Hedrick wrote:
>
> >This is the first case where the "elevator" an be used as a strong boost.
>
> I'm curious to see how much difference it will make. To try it out you
> should tell us where are you going to store the geometry information. I
> don't care of a real sane geometry API at the moment, just make an hack to
> provide that info to the elevator layer (in a static variable as worse).
> Then I or Jens can make a patch to make the elevator to use such
> new information for the interesting HD instead of the blocknr.

| +------ LBA 0 top of platter.
| +----- LBA End top of platter.
|-----------------------------------
|
+--- axis of rotation.

We do a C or inverted Q position loop, real basic stuff for prediction by
knowing the characteristic of the media in a documented way.

> I'm actually doing VM benchmarking, if you need that elevator change fast
> you can ask Jens too (you can keep me in CC of course).
>
> Andrea
>

Andre Hedrick
The Linux ATA/IDE guy


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