Ingo Oeser wrote:
>On Sun, Jul 07, 2002 at 08:19:33PM -0700, Andrew Morton wrote:
> > Question is: what do we want to do with this sucker? These are the
> > remaining users of kiovecs:
> >
> > drivers/md/lvm-snap.c
> > drivers/media/video/video-buf.c
> > drivers/mtd/devices/blkmtd.c
> > drivers/scsi/sg.c
> >
> > the video and mtd drivers seems to be fairly easy to de-kiobufize.
> > I'm aware of one proprietary driver which uses kiobufs. XFS uses
> > kiobufs a little bit - just to map the pages.
>
> It would be nice if we could just map a set of user pages to a scatterlist.
After disabling kiobufs in sg I would like such a drop
in replacement.
> Developers of mass transfer devices (video grabbers, dsp devices, sg and
> many others) would just LOVE you for this ;-)
Agreed. Tape devices could be added to your list.
Large page support will make for very efficient zero
copy IO.
> Block devices are the common case worth optimizing for, but character
> devices just need to reimplement most of this, if they want the same
> optimizations. Some devices need mass transfers and are NOT blockdevices.
> Please consider supporting them better for 2.5 in stuff similiar to BIOs
> and DMA to/from user pages.
CIOs?
Doug Gilbert
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This archive was generated by hypermail 2b29 : Mon Jul 15 2002 - 22:00:14 EST