Re: [PATCH] kiobuf/rawio fixes for 2.4.0-test10-pre6

[Christoph Hellwig <hch@caldera.de>]

On Mon, Oct 30, 2000 at 01:56:07PM -0500, Jeff Garzik wrote:
> My question from above is:  how can the via audio mmap in test10-preXX
> be improved by using kiobufs?  I am not a kiobuf expert, but AFAICS a
> non-kiobuf implementation is better for audio drivers.  (and the via
> audio mmap implementation is what some other audio drivers are about to
> start using...)

I think the biggest advantage is that you actually get the list of pages
when you perform the mmap instead of doing virt_to_page on every ->nopage.
That should speed up the operations on the mmap'ed are a bit.

The other strong argument for the kiobuf solution is code-sharing. Instead
of having every (sound) driver playing with the vm, there is one central
place when you use kvmaps.

	Christoph

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