freebsd-dev/sys/vm/swap_pager.h
Poul-Henning Kamp ec38b344cb Move the implementation of the vmspace_swap_count() (used only in
the "toss the largest process" emergency handling) from vm_map.c to
swap_pager.c.

The quantity calculated depends strongly on the internals of the
swap_pager and by moving it, we no longer need to expose the
internal metrics of the swap_pager to the world.
2003-07-18 10:47:58 +00:00

81 lines
3.0 KiB
C

/*
* Copyright (c) 1990 University of Utah.
* Copyright (c) 1991 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* the Systems Programming Group of the University of Utah Computer
* Science Department.
*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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.
*
* from: @(#)swap_pager.h 7.1 (Berkeley) 12/5/90
* $FreeBSD$
*/
/*
* Modifications to the block allocation data structure by John S. Dyson
* 18 Dec 93.
*/
#ifndef _VM_SWAP_PAGER_H_
#define _VM_SWAP_PAGER_H_ 1
/*
* Swap device table
*/
struct swdevt {
udev_t sw_dev; /* For quasibogus swapdev reporting */
int sw_flags;
int sw_nblks;
int sw_used;
struct vnode *sw_vp;
dev_t sw_device;
};
#define SW_FREED 0x01
#define SW_SEQUENTIAL 0x02
#define SW_CLOSING 0x04
#define sw_freed sw_flags /* XXX compat */
#ifdef _KERNEL
extern int swap_pager_full;
extern int vm_swap_size;
void swap_pager_putpages(vm_object_t, vm_page_t *, int, boolean_t, int *);
void swap_pager_copy(vm_object_t, vm_object_t, vm_pindex_t, int);
void swap_pager_freespace(vm_object_t, vm_pindex_t, vm_size_t);
void swap_pager_swap_init(void);
int swap_pager_isswapped(vm_object_t, int);
int swap_pager_reserve(vm_object_t, vm_pindex_t, vm_size_t);
void swap_pager_status(int *total, int *used);
#endif /* _KERNEL */
#endif /* _VM_SWAP_PAGER_H_ */