Peter Teoh wrote:
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.
No, it does not maintain a copy. It mmaps the page cache pages into its own address space.
so...does there exists duplicated buffering? (one in kernel - pagecache, and one in userspace - for mmap() content of the file in process memory)
No, there is no such double buffering. -- All rights reversed. -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
