Re: mapping user space buffer to kernel address space

[Linus Torvalds]

On Fri, 20 Oct 2000, Andrea Arcangeli wrote:

> On Thu, Oct 19, 2000 at 05:16:14PM -0400, Jeff Garzik wrote:
> > solution is really elegant.  Excluding all the debug code and assertions
> > I stick in there, the guts of via audio mmap support went from ~50 lines
> > to ~10.
> 
> Was it 50 lines with remap_page_range?

You cannot use remap_page_range() if the pages aren't physically
contiguous.

Face it, Andrea, remap_page_range() is a very limited hack that only works
for a very limited subset of the things that real people want to do. It is
_not_ a generic solution, while the nopage() approach _is_ generic.

                Linus

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [EMAIL PROTECTED]
Please read the FAQ at http://www.tux.org/lkml/