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-.\" Copyright (c) 1991, 1993
-.\"	The Regents of the University of California.  All rights reserved.
-.\"
-.\" Redistribution and use in source and binary forms, with or without
-.\" modification, are permitted provided that the following conditions
-.\" are met:
-.\" 1. Redistributions of source code must retain the above copyright
-.\"    notice, this list of conditions and the following disclaimer.
-.\" 2. Redistributions in binary form must reproduce the above copyright
-.\"    notice, this list of conditions and the following disclaimer in the
-.\"    documentation and/or other materials provided with the distribution.
-.\" 3. Neither the name of the University nor the names of its contributors
-.\"    may be used to endorse or promote products derived from this software
-.\"    without specific prior written permission.
-.\"
-.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
-.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
-.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-.\" SUCH DAMAGE.
-.\"
-.\"	@(#)mincore.2	8.1 (Berkeley) 6/9/93
-.\"
-.Dd August 23, 2020
-.Dt MINCORE 2
-.Os
-.Sh NAME
-.Nm mincore
-.Nd determine residency of memory pages
-.Sh LIBRARY
-.Lb libc
-.Sh SYNOPSIS
-.In sys/mman.h
-.Ft int
-.Fn mincore "const void *addr" "size_t len" "char *vec"
-.Sh DESCRIPTION
-The
-.Fn mincore
-system call determines whether each of the pages in the region beginning at
-.Fa addr
-and continuing for
-.Fa len
-bytes is resident or mapped, depending on the value of sysctl
-.Va vm.mincore_mapped .
-.\"The beginning address,
-.\".Fa addr ,
-.\"is first rounded down to a multiple of the page size (see
-.\".Xr getpagesize 3 ) .
-.\"The end address,
-.\".Fa addr No + Fa len ,
-.\"is rounded up to a multiple of the page size.
-The status is returned in the
-.Fa vec
-array, one character per page.
-Each character is either 0 if the page is not resident, or a combination of
-the following flags (defined in
-.In sys/mman.h ) :
-.Bl -tag -width ".Dv MINCORE_REFERENCED_OTHER"
-.It Dv MINCORE_INCORE
-Page is in core (resident).
-.It Dv MINCORE_REFERENCED
-Page has been referenced by us.
-.It Dv MINCORE_MODIFIED
-Page has been modified by us.
-.It Dv MINCORE_REFERENCED_OTHER
-Page has been referenced.
-.It Dv MINCORE_MODIFIED_OTHER
-Page has been modified.
-.It Dv MINCORE_PSIND(i)
-Page is part of a large
-.Pq Dq super
-page with size given by index
-.Dv i
-in the array returned by
-.Xr getpagesizes 3 .
-.It Dv MINCORE_SUPER
-A mask of the valid
-.Dv MINCORE_PSIND()
-values.
-If any bits in this mask are set, the page is part of a large
-.Pq Dq super
-page.
-.El
-.Pp
-The information returned by
-.Fn mincore
-may be out of date by the time the system call returns.
-The only way to ensure that a page is resident is to lock it into memory
-with the
-.Xr mlock 2
-system call.
-.Pp
-If the
-.Va vm.mincore_mapped
-sysctl is set to a non-zero value (default), only the current process'
-mappings of the pages in the specified virtual address range are examined.
-This does not preclude the system from returning
-.Dv MINCORE_REFERENCED_OTHER
-and
-.Dv MINCORE_MODIFIED_OTHER
-statuses.
-Otherwise, if the sysctl value is zero, all resident pages backing the
-specified address range are examined, regardless of the mapping state.
-.Sh IMPLEMENTATION NOTES
-Prior to the introduction of
-.Dv MINCORE_PSIND()
-in
-.Fx 13.0 ,
-.Dv MINCORE_SUPER
-consisted of a single bit equal to
-.Dv MINCORE_PSIND(1) .
-In particular, applications compiled using the old value of
-.Dv MINCORE_SUPER
-will not identify large pages with size index 2 as being large pages.
-.Sh RETURN VALUES
-.Rv -std mincore
-.Sh ERRORS
-The
-.Fn mincore
-system call will fail if:
-.Bl -tag -width Er
-.It Bq Er ENOMEM
-The virtual address range specified by the
-.Fa addr
-and
-.Fa len
-arguments is not fully mapped.
-.It Bq Er EFAULT
-The
-.Fa vec
-argument points to an illegal address.
-.El
-.Sh SEE ALSO
-.Xr madvise 2 ,
-.Xr mlock 2 ,
-.Xr mprotect 2 ,
-.Xr msync 2 ,
-.Xr munmap 2 ,
-.Xr getpagesize 3 ,
-.Xr getpagesizes 3
-.Sh HISTORY
-The
-.Fn mincore
-system call first appeared in
-.Bx 4.4 .