Erik Mouw wrote: > > On Tue, Dec 04, 2001 at 10:11:56PM -0800, Amit Purohit wrote: > > As the kernel address space in the new linux kernels > > spans the entire 0 to 4 GB, still why do we need to do > > copy_to_user or copy_from user ? > > Because we can't be sure that the page is in physical memory. If it's not, we'll just have to service a page fault; why's that a problem? Cheers, -- Joe -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ IRC Channel: irc.openprojects.net / #kernelnewbies Web Page: http://www.kernelnewbies.org/
