On Wed, Oct 29, 2008 at 04:37:30PM -0400, Alan Stern wrote: > I discussed this last summer with Rafael. It's a lot harder than it > looks, for all sorts of reasons. For example, what about user tasks > that have access to memory-mapped I/O regions? The only interesting cases of this I know of are X (which ought to stop doing so in the near future) and certain sound operations (which are going via a well-defined API anyway and need to handle devices going away at random, so not a problem). There may be some other niche cases, but really - if you're mmapping hardware then it's generally because you haven't written a proper kernel driver. Do that instead. Runtime power management's already going to make you wildly unhappy. -- Matthew Garrett | mjg59@xxxxxxxxxxxxx _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
