MADVISE(2) BSD Programmer's Manual MADVISE(2)
madvise - give advice about use of memory
#include <sys/types.h> #include <sys/mman.h> int 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 recy- cled.
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. MirOS BSD #10-current June 9, 1993 1
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