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    SubjectRe: [PATCH] kiobuf/rawio fixes for 2.4.0-test10-pre6
    On Mon, Oct 30, 2000 at 12:19:21PM -0500, Jeff Garzik wrote:
    > Christoph Hellwig wrote:
    > > +Locking down user memory and doing mass storage device IO with it is not
    > > +the only purpose of kiobufs. Another use for kiobufs is allowing
    > > +user-space mmaping dma memory, e.g in sound drivers. To do so you
    > > +need to lock-down kernel virtual memory and refernece it using kiobufs.
    > > +The code that does exactly this is not yet in the kernel - get Stephen
    > > +Tweedie's kiobuf patchset if you want to use this.
    > Take a look at drivers/sound/via82cxxx_audio.c. How can that mmap be
    > improved by using kiobufs?

    I think so - but you need Stephen's kvmap patch, that is in the same
    patchset the forward-ported fixes are

    An very nice example is included.


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