Re: Getting big areas of memory, in 2.3.x?

Jeff Garzik
1999-12-09T02:45:14Z

Alan Cox wrote:
>
> > What's the best way to get a large region of DMA'able memory for use
> > with framegrabbers and other greedy drivers?
>
> Do you need physically linear memory >

Yes. For the Meteor-II grabber I don't think so, but it looks like the
older (but mostly compatible) Corona needs it.

> > Per a thread on glx-dev, Andi Kleen mentions that the new 2.3.x MM stuff
> > still doesn't allieviate the need for bigphysarea and similar patches.
>
> It helps, however the best answer is to use sane hardware which has scatter
> gather - eg the bttv frame grabbers grab 1Mb of memory or more, but they
> grab it as arbitary pages not a linear block.

That's the easy answer too :)

--
Jeff Garzik | Just once, I wish we would encounter
Building 1024 | an alien menace that wasn't immune to
MandrakeSoft, Inc. | bullets. -- The Brigadier, "Dr. Who"