Chapter 13. Mmap

The mmap system call allows a file (or parts of a file) to be mapped to memory. This allows the file content to be changed with a memory operation, avoiding system calls and input/output operations.
Always synchronize the changes to disk, and plan for a process hang that could result in data loss.

Note

For more information, or for further reading, the following man page and book are related to the information given in this section:
  • mmap(2)
  • Linux System Programming by Robert Love