| vfs_bio.c (12799) | vfs_bio.c (12819) |
|---|---|
| 1/* 2 * Copyright (c) 1994 John S. Dyson 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 4 unchanged lines hidden (view full) --- 13 * documentation and/or other materials provided with the distribution. 14 * 3. Absolutely no warranty of function or purpose is made by the author 15 * John S. Dyson. 16 * 4. This work was done expressly for inclusion into FreeBSD. Other use 17 * is allowed if this notation is included. 18 * 5. Modifications may be freely made to this file if the above conditions 19 * are met. 20 * | 1/* 2 * Copyright (c) 1994 John S. Dyson 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 4 unchanged lines hidden (view full) --- 13 * documentation and/or other materials provided with the distribution. 14 * 3. Absolutely no warranty of function or purpose is made by the author 15 * John S. Dyson. 16 * 4. This work was done expressly for inclusion into FreeBSD. Other use 17 * is allowed if this notation is included. 18 * 5. Modifications may be freely made to this file if the above conditions 19 * are met. 20 * |
| 21 * $Id: vfs_bio.c,v 1.76 1995/12/11 04:56:05 dyson Exp $ | 21 * $Id: vfs_bio.c,v 1.78 1995/12/13 03:47:01 dyson Exp $ |
| 22 */ 23 24/* 25 * this file contains a new buffer I/O scheme implementing a coherent 26 * VM object and buffer cache scheme. Pains have been taken to make 27 * sure that the performance degradation associated with schemes such 28 * as this is not realized. 29 * --- 23 unchanged lines hidden (view full) --- 53#include <sys/mount.h> 54#include <sys/malloc.h> 55#include <sys/resourcevar.h> 56#include <sys/proc.h> 57 58#include <miscfs/specfs/specdev.h> 59 60static void vfs_update __P((void)); | 22 */ 23 24/* 25 * this file contains a new buffer I/O scheme implementing a coherent 26 * VM object and buffer cache scheme. Pains have been taken to make 27 * sure that the performance degradation associated with schemes such 28 * as this is not realized. 29 * --- 23 unchanged lines hidden (view full) --- 53#include <sys/mount.h> 54#include <sys/malloc.h> 55#include <sys/resourcevar.h> 56#include <sys/proc.h> 57 58#include <miscfs/specfs/specdev.h> 59 60static void vfs_update __P((void)); |
| 61struct proc *updateproc; | 61static struct proc *updateproc; |
| 62static struct kproc_desc up_kp = { 63 "update", 64 vfs_update, 65 &updateproc 66}; 67SYSINIT_KT(update, SI_SUB_KTHREAD_UPDATE, SI_ORDER_FIRST, kproc_start, &up_kp) 68 69struct buf *buf; /* buffer header pool */ 70struct swqueue bswlist; 71 72int count_lock_queue __P((void)); | 62static struct kproc_desc up_kp = { 63 "update", 64 vfs_update, 65 &updateproc 66}; 67SYSINIT_KT(update, SI_SUB_KTHREAD_UPDATE, SI_ORDER_FIRST, kproc_start, &up_kp) 68 69struct buf *buf; /* buffer header pool */ 70struct swqueue bswlist; 71 72int count_lock_queue __P((void)); |
| 73void vm_hold_free_pages(struct buf * bp, vm_offset_t from, vm_offset_t to); 74void vm_hold_load_pages(struct buf * bp, vm_offset_t from, vm_offset_t to); 75void vfs_clean_pages(struct buf * bp); | 73static void vm_hold_free_pages(struct buf * bp, vm_offset_t from, 74 vm_offset_t to); 75static void vm_hold_load_pages(struct buf * bp, vm_offset_t from, 76 vm_offset_t to); 77static void vfs_clean_pages(struct buf * bp); |
| 76static void vfs_setdirty(struct buf *bp); 77 78int needsbuffer; 79 80/* 81 * Internal update daemon, process 3 82 * The variable vfs_update_wakeup allows for internal syncs. 83 */ --- 8 unchanged lines hidden (view full) --- 92/* 93 * bogus page -- for I/O to/from partially complete buffers 94 * this is a temporary solution to the problem, but it is not 95 * really that bad. it would be better to split the buffer 96 * for input in the case of buffers partially already in memory, 97 * but the code is intricate enough already. 98 */ 99vm_page_t bogus_page; | 78static void vfs_setdirty(struct buf *bp); 79 80int needsbuffer; 81 82/* 83 * Internal update daemon, process 3 84 * The variable vfs_update_wakeup allows for internal syncs. 85 */ --- 8 unchanged lines hidden (view full) --- 94/* 95 * bogus page -- for I/O to/from partially complete buffers 96 * this is a temporary solution to the problem, but it is not 97 * really that bad. it would be better to split the buffer 98 * for input in the case of buffers partially already in memory, 99 * but the code is intricate enough already. 100 */ 101vm_page_t bogus_page; |
| 100vm_offset_t bogus_offset; | 102static vm_offset_t bogus_offset; |
| 101 | 103 |
| 102int bufspace, maxbufspace; | 104static int bufspace, maxbufspace; |
| 103 | 105 |
| 104struct bufhashhdr bufhashtbl[BUFHSZ], invalhash; 105struct bqueues bufqueues[BUFFER_QUEUES]; | 106static struct bufhashhdr bufhashtbl[BUFHSZ], invalhash; 107static struct bqueues bufqueues[BUFFER_QUEUES]; |
| 106 107#define BUF_MAXUSE 8 108 109/* 110 * Initialize buffer headers and related structures. 111 */ 112void 113bufinit() --- 1529 unchanged lines hidden --- | 108 109#define BUF_MAXUSE 8 110 111/* 112 * Initialize buffer headers and related structures. 113 */ 114void 115bufinit() --- 1529 unchanged lines hidden --- |