lkml.org 
[lkml]   [2000]   [Oct]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    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
    (at ftp://ftp.linux.org.uk/pub/linux/sct/fs/raw-io/)

    An very nice example is included.

    Christoph

    --
    Always remember that you are unique. Just like everyone else.
    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.kernel.org
    Please read the FAQ at http://www.tux.org/lkml/

    \
     
     \ /
      Last update: 2005-03-22 12:45    [W:0.022 / U:29.392 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site