when a process mmap() a section of a file into its own process memory, the process memory will maintain a copy of the data of that section of the file. but then this is pagecache which cache the physically opened file, right? so...does there exists duplicated buffering? (one in kernel - pagecache, and one in userspace - for mmap() content of the file in process memory) Correct? So so...then it looks like a lot of duplicated stuff ..... -- Regards, Peter Teoh -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ