Hi, I've devellopped a driver, and my application can communicate with it via the mmap system. I didn't use the munmap function since the region is automatically unmapped when the process is terminated. I've got to make "restarts" in my application, so the mmap will be called several times: ptr = (u_int *) mmap (NULL, size * sizeof (u_int), PROT_READ | PROT_WRITE , MAP_SHARED, fd, 0); I tried to call munmap with the same arguments as the mmap call, it fails saying "Invalid argument". munmap ((void *)ptr, size * sizeof (u_int)); Does anybody can help me? What will happen if I make severals mmap without any munmap? Thank's Frederic -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
