Hi, Is there any restriction that copy_from_user and copy_to_user can copy only upto page 4k(page size) of user data? If I need to pass more than 4K, should I check for making multiple calls from within the driver? Thanks Raghav - 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/