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mincore(2)
mincore(2) System Calls mincore(2)
NAME
mincore - determine residency of memory pages
SYNOPSIS
#include <sys/types.h>
int mincore(void *addr, size_t len, char *vec);
DESCRIPTION
The mincore() function determines the residency of the memory pages in
the address space covered by mappings in the range [addr, addr + len].
The status is returned as a character-per-page in the character array
referenced by *vec (which the system assumes to be large enough to
encompass all the pages in the address range). The least significant
bit of each character is set to 1 to indicate that the referenced page
is in primary memory, and to 0 to indicate that it is not. The settings
of other bits in each character are undefined and may contain other
information in future implementations.
Because the status of a page can change between the time mincore()
checks and returns the information, returned information might be out‐
dated. Only locked pages are guaranteed to remain in memory; see
mlock(3C).
RETURN VALUES
Upon successful completion, mincore() returns 0. Otherwise, −1 is
returned and errno is set to indicate the error.
ERRORS
The mincore() function will fail if:
EFAULT The vec argument points to an illegal address.
EINVAL The addr argument is not a multiple of the page size as
returned by sysconf(3C), or the len argument has a value less
than or equal to 0.
ENOMEM Addresses in the range [addr, addr + len] are invalid for the
address space of a process or specify one or more pages which
are not mapped.
SEE ALSO
mmap(2), mlock(3C), sysconf(3C)
Oracle Solaris 11.4 12 June 2019 mincore(2)