MINCORE(2) BSD Programmer's Manual MINCORE(2)
mincore - get advise about use of memory
mincore(caddr_t addr, int len, char *vec);
The mincore() system call allows a process to obtain information about
whether pages are core resident. Here the current core residency of the
pages is returned in the character array vec, with a value of 1 meaning
that the page is in-core.
msync(2), munmap(2), mprotect(2), madvise(2),
The mincore() function first appeared in 4.4BSD.
4.4BSD June 9, 1993 1