Hi, This is somewhat related to Linux in that this situation overlaps with some of the changes in the file {2.4,2.6}fs/proc/kcore.c. I apologize in advance if it is not case. I searched marc.theaimsgroup and other random places for the patch that might explain why the .lseek operation was removed and whether it has repercussions on the way, user-space, lseek will work with /proc/kcore. Nothing relevant. 2.4 and 2.6 differ in the kcore llseek file operation as follows struct file_operations proc_kcore_operations = { read: read_kcore, open: open_kcore, llseek: lseek_kcore, /* this line is absent in 2.6 */ }; It would be very helpfull if someone could point me to the patch/discussion or explain this change. thank you, Youssef Hmamouche -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/