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swap_pager.h (108600) swap_pager.h (108602)
1/*
2 * Copyright (c) 1990 University of Utah.
3 * Copyright (c) 1991 The Regents of the University of California.
4 * All rights reserved.
5 *
6 * This code is derived from software contributed to Berkeley by
7 * the Systems Programming Group of the University of Utah Computer
8 * Science Department.

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31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 *
38 * from: @(#)swap_pager.h 7.1 (Berkeley) 12/5/90
1/*
2 * Copyright (c) 1990 University of Utah.
3 * Copyright (c) 1991 The Regents of the University of California.
4 * All rights reserved.
5 *
6 * This code is derived from software contributed to Berkeley by
7 * the Systems Programming Group of the University of Utah Computer
8 * Science Department.

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31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 *
38 * from: @(#)swap_pager.h 7.1 (Berkeley) 12/5/90
39 * $FreeBSD: head/sys/vm/swap_pager.h 108600 2003-01-03 14:30:46Z phk $
39 * $FreeBSD: head/sys/vm/swap_pager.h 108602 2003-01-03 16:23:12Z phk $
40 */
41
42/*
43 * Modifications to the block allocation data structure by John S. Dyson
44 * 18 Dec 93.
45 */
46
47#ifndef _VM_SWAP_PAGER_H_
48#define _VM_SWAP_PAGER_H_ 1
49
50/*
40 */
41
42/*
43 * Modifications to the block allocation data structure by John S. Dyson
44 * 18 Dec 93.
45 */
46
47#ifndef _VM_SWAP_PAGER_H_
48#define _VM_SWAP_PAGER_H_ 1
49
50/*
51 * Swap device table
52 */
53struct swdevt {
54 udev_t sw_dev; /* For quasibogus swapdev reporting */
55 int sw_flags;
56 int sw_nblks;
57 int sw_used;
58 struct vnode *sw_vp;
59 dev_t sw_device;
60};
61#define SW_FREED 0x01
62#define SW_SEQUENTIAL 0x02
63#define SW_CLOSING 0x04
64#define sw_freed sw_flags /* XXX compat */
65
66#ifdef _KERNEL
67
68/*
51 * SWB_NPAGES must be a power of 2. It may be set to 1, 2, 4, 8, or 16
52 * pages per allocation. We recommend you stick with the default of 8.
53 * The 16-page limit is due to the radix code (kern/subr_blist.c).
54 */
55#if !defined(SWB_NPAGES)
56#define SWB_NPAGES 8
57#endif
58

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73struct swblock {
74 struct swblock *swb_hnext;
75 vm_object_t swb_object;
76 vm_pindex_t swb_index;
77 int swb_count;
78 daddr_t swb_pages[SWAP_META_PAGES];
79};
80
69 * SWB_NPAGES must be a power of 2. It may be set to 1, 2, 4, 8, or 16
70 * pages per allocation. We recommend you stick with the default of 8.
71 * The 16-page limit is due to the radix code (kern/subr_blist.c).
72 */
73#if !defined(SWB_NPAGES)
74#define SWB_NPAGES 8
75#endif
76

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91struct swblock {
92 struct swblock *swb_hnext;
93 vm_object_t swb_object;
94 vm_pindex_t swb_index;
95 int swb_count;
96 daddr_t swb_pages[SWAP_META_PAGES];
97};
98
81#ifdef _KERNEL
82extern struct pagerlst swap_pager_un_object_list;
83extern int swap_pager_full;
84extern struct blist *swapblist;
85extern struct uma_zone *swap_zone;
86extern int nswap_lowat, nswap_hiwat;
87extern int dmmax, dmmax_mask;
88extern struct vnode *swapdev_vp;
89extern struct swdevt *swdevt;

--- 30 unchanged lines hidden --- 		99extern struct pagerlst swap_pager_un_object_list;
100extern int swap_pager_full;
101extern struct blist *swapblist;
102extern struct uma_zone *swap_zone;
103extern int nswap_lowat, nswap_hiwat;
104extern int dmmax, dmmax_mask;
105extern struct vnode *swapdev_vp;
106extern struct swdevt *swdevt;

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