madvise - give advice about use of memory
madvise(void *addr, size_t len, int behav);
The madvise() system call allows a process that has knowledge of its memory
behavior to describe it to the system. The possible behaviors are:
MADV_NORMAL No further special treatment needed.
MADV_RANDOM Expect random page access patterns.
MADV_SEQUENTIAL Expect sequential page references.
MADV_WILLNEED The pages will be referenced soon.
MADV_DONTNEED The pages will not be referenced soon.
MADV_SPACEAVAIL Ensure that resources are reserved.
MADV_FREE The pages don't contain any useful data and
can be recycled.
Upon successful completion, a value of 0 is returned. Otherwise, a value
of -1 is returned and errno is set to indicate the error.
mincore(2), minherit(2), mprotect(2), msync(2), munmap(2)
The madvise function first appeared in 4.4BSD.
OpenBSD 3.6 June 9, 1993
[ Back ]