site_archiver@lists.apple.com Delivered-To: darwin-kernel@lists.apple.com Correct. Yes. S+E -- Quinn "The Eskimo!" <http://www.apple.com/developer/> Apple Developer Relations, Developer Technical Support, Core OS/Hardware _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.a... At 20:35 +1100 7/2/10, Godfrey van der Linden wrote: I'm pretty sure that the 4Gbyte KVA on 32 bit is going to make the uio_copyin() operations relatively expensive but what about the 64bit kernels do they naturally have better access to user space mappings? K64 definitely changes the landscape for this sort of thing, but I don't know whether it's enough to tip a balance like this. This email sent to site_archiver@lists.apple.com