Re: [PATCH] Asynchronous scan support for libata

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On Sat, 8 Sep 2007 11:19:17 -0600
Matthew Wilcox <matthew@xxxxxx> wrote:

> On Sat, Sep 08, 2007 at 05:10:27PM +0900, Tejun Heo wrote:
> > I think it's generally okay although it would need to spend quite some
> > time in -mm and we'll need to exclude several drivers which require
> > host-wide silence for mode programming (the current code is buggy but
> > sequential probing hides it pretty well) till host-wide exclusion is
> > implemented.
> 
> Can you tell me a bit more about these drivers?  Would it be possible to
> convert them to one host/many channels, which would give us the exclusion
> we want?

That would be a more natural way to do it and it would help for the cases
we don't support which are one command per controller not one per
channel. The PMP code has removed the two devices per channel assumption
so in theory we could already fake such a controller as a PMP setup but
obviously should expose the two things seperately.

Alan
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