On Tue, 2005-08-09 at 20:41 +0100, Russell King wrote: > On Tue, Aug 09, 2005 at 07:38:52AM -0700, Martin J. Bligh wrote: > > pfn_valid() doesn't tell you it's RAM or not - it tells you whether you > > have a backing struct page for that address. Could be an IO mapped device, > > a small memory hole, whatever. > > The only things which have a struct page is RAM. Nothing else does.
Well, not anymore :) With sparsemem, you can cheat now and have struct page for non-RAM, and this is actually useful. I want some IO space to be "context switchable" and thus map it with nopage() functionality, etc... Ben. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
