Messages in this thread | | | Date | Thu, 19 Oct 2000 15:45:43 -0700 (PDT) | From | Linus Torvalds <> | Subject | Re: mapping user space buffer to kernel address space |
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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
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