| swap_pager.h (3449) | swap_pager.h (5455) |
|---|---|
| 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. --- 22 unchanged lines hidden (view full) --- 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. --- 22 unchanged lines hidden (view full) --- 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 * $Id: swap_pager.h,v 1.2 1994/05/25 09:18:39 rgrimes Exp $ | 39 * $Id: swap_pager.h,v 1.3 1994/10/09 01:52:06 phk Exp $ |
| 40 */ 41 42/* 43 * Modifications to the block allocation data structure by John S. Dyson 44 * 18 Dec 93. 45 */ 46 47#ifndef _SWAP_PAGER_ 48#define _SWAP_PAGER_ 1 49 50/* 51 * SWB_NPAGES can be set to any value from 1 to 16 pages per allocation, 52 * however, due to the allocation spilling into non-swap pager backed memory, 53 * suggest keeping SWB_NPAGES small (1-4). If high performance is manditory 54 * perhaps up to 8 pages might be in order???? 55 * Above problem has been fixed, now we support 16 pages per block. Unused 56 * space is recovered by the swap pager now... 57 */ 58#define SWB_NPAGES 8 | 40 */ 41 42/* 43 * Modifications to the block allocation data structure by John S. Dyson 44 * 18 Dec 93. 45 */ 46 47#ifndef _SWAP_PAGER_ 48#define _SWAP_PAGER_ 1 49 50/* 51 * SWB_NPAGES can be set to any value from 1 to 16 pages per allocation, 52 * however, due to the allocation spilling into non-swap pager backed memory, 53 * suggest keeping SWB_NPAGES small (1-4). If high performance is manditory 54 * perhaps up to 8 pages might be in order???? 55 * Above problem has been fixed, now we support 16 pages per block. Unused 56 * space is recovered by the swap pager now... 57 */ 58#define SWB_NPAGES 8 |
| 59struct swblock { | 59struct swblock { |
| 60 unsigned short swb_valid; /* bitmask for valid pages */ 61 unsigned short swb_locked; /* block locked */ | 60 unsigned short swb_valid; /* bitmask for valid pages */ 61 unsigned short swb_locked; /* block locked */ |
| 62 int swb_block[SWB_NPAGES]; /* unfortunately int instead of daddr_t */ | 62 int swb_block[SWB_NPAGES]; /* unfortunately int instead of daddr_t */ |
| 63}; | 63}; |
| 64typedef struct swblock *sw_blk_t; | 64typedef struct swblock *sw_blk_t; |
| 65 66/* 67 * Swap pager private data. 68 */ 69struct swpager { | 65 66/* 67 * Swap pager private data. 68 */ 69struct swpager { |
| 70 vm_size_t sw_osize; /* size of object we are backing (bytes) */ 71 int sw_nblocks;/* number of blocks in list (sw_blk_t units) */ 72 sw_blk_t sw_blocks; /* pointer to list of swap blocks */ 73 short sw_flags; /* flags */ 74 short sw_poip; /* pageouts in progress */ 75 short sw_piip; /* pageins in progress */ | 70 vm_size_t sw_osize; /* size of object we are backing (bytes) */ 71 int sw_nblocks; /* number of blocks in list (sw_blk_t units) */ 72 sw_blk_t sw_blocks; /* pointer to list of swap blocks */ 73 short sw_flags; /* flags */ 74 short sw_poip; /* pageouts in progress */ 75 short sw_piip; /* pageins in progress */ |
| 76}; | 76}; |
| 77typedef struct swpager *sw_pager_t; | 77typedef struct swpager *sw_pager_t; |
| 78 79#define SW_WANTED 0x01 80#define SW_NAMED 0x02 81 82#ifdef KERNEL 83 | 78 79#define SW_WANTED 0x01 80#define SW_NAMED 0x02 81 82#ifdef KERNEL 83 |
| 84void swap_pager_init(void); 85vm_pager_t swap_pager_alloc(caddr_t, vm_size_t, vm_prot_t, vm_offset_t); 86void swap_pager_dealloc(vm_pager_t); 87boolean_t swap_pager_getpage(vm_pager_t, vm_page_t, boolean_t); 88boolean_t swap_pager_putpage(vm_pager_t, vm_page_t, boolean_t); 89boolean_t swap_pager_getmulti(vm_pager_t, vm_page_t *, int, int, boolean_t); 90boolean_t swap_pager_haspage(vm_pager_t, vm_offset_t); 91int swap_pager_io(sw_pager_t, vm_page_t *, int, int, int); 92void swap_pager_iodone(struct buf *); 93boolean_t swap_pager_clean(); 94void swap_pager_copy __P((vm_pager_t, vm_offset_t, vm_pager_t, vm_offset_t, vm_offset_t)); 95void swap_pager_freespace __P((vm_pager_t, vm_offset_t, vm_offset_t)); | 84void swap_pager_init(void); 85vm_pager_t swap_pager_alloc(caddr_t, vm_size_t, vm_prot_t, vm_offset_t); 86void swap_pager_dealloc(vm_pager_t); 87boolean_t swap_pager_getpage(vm_pager_t, vm_page_t, boolean_t); 88boolean_t swap_pager_putpage(vm_pager_t, vm_page_t, boolean_t); 89boolean_t swap_pager_getmulti(vm_pager_t, vm_page_t *, int, int, boolean_t); 90boolean_t swap_pager_haspage(vm_pager_t, vm_offset_t); 91int swap_pager_io(sw_pager_t, vm_page_t *, int, int, int); 92void swap_pager_iodone(struct buf *); 93boolean_t swap_pager_clean(); 94void swap_pager_copy __P((vm_pager_t, vm_offset_t, vm_pager_t, vm_offset_t, vm_offset_t)); 95void swap_pager_freespace __P((vm_pager_t, vm_offset_t, vm_offset_t)); |
| 96 97extern struct pagerops swappagerops; 98 99#endif 100 | 96 97extern struct pagerops swappagerops; 98 99#endif 100 |
| 101#endif /* _SWAP_PAGER_ */ | 101#endif /* _SWAP_PAGER_ */ |