On Wed, Dec 12, 2001 at 02:28:54PM -0500, [EMAIL PROTECTED] wrote: > Meanwhile, it would appear that no PCI devices are currently taking > advantage of this support anyway. I've looked at Netwinder PCI > config and AFAICT no PCI devices make use of this resource.
Hang on, I'll turn off all my systems with PCI support. Why do we need PCI support now? 8) > I could use an education here if anyone can offer clues. Why include > support for a feature which nothing currently uses? : ) Seriously, there are devices that have prefetchable memory regions on them, and if you can make use of them, you get higher performance out of the PCI bus - for instance, if your framebuffer is in a PCI prefetchable region (which one of the machines I have here is), then consecutive CPU reads in that region will use less bus cycles since the information gets cached on the host bridge. Also, several mainline Linux folk have expressed an interest in this work as a means of getting better performance from their systems. _______________________________________________ http://lists.arm.linux.org.uk/mailman/listinfo/linux-arm Please visit the above address for information on this list.
