50.5. Summary

In this chapter, we considered various operations that can be performed on a process’s virtual memory:

• The mprotect() system call changes the protection on a region of virtual memory.

• The mlock() and mlockall() system calls lock part or all of a process’s virtual address space, respectively, into physical memory.

• The mincore() system call reports which pages in a virtual memory region are currently resident in physical memory.

• The madvise() system call and the posix_madvise() function allow a process to advise the kernel about the process’s expected patterns of memory use.