| vfs_bio.c (40764) | vfs_bio.c (40790) |
|---|---|
| 1/* 2 * Copyright (c) 1994,1997 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 9 * notice immediately at the beginning of the file, without modification, 10 * this list of conditions, and the following disclaimer. 11 * 2. Absolutely no warranty of function or purpose is made by the author 12 * John S. Dyson. 13 * | 1/* 2 * Copyright (c) 1994,1997 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 9 * notice immediately at the beginning of the file, without modification, 10 * this list of conditions, and the following disclaimer. 11 * 2. Absolutely no warranty of function or purpose is made by the author 12 * John S. Dyson. 13 * |
| 14 * $Id: vfs_bio.c,v 1.182 1998/10/29 11:04:22 dg Exp $ | 14 * $Id: vfs_bio.c,v 1.183 1998/10/30 14:53:54 dg Exp $ |
| 15 */ 16 17/* 18 * this file contains a new buffer I/O scheme implementing a coherent 19 * VM object and buffer cache scheme. Pains have been taken to make 20 * sure that the performance degradation associated with schemes such 21 * as this is not realized. 22 * --- 151 unchanged lines hidden (view full) --- 174 for (i = 0; i < nbuf; i++) { 175 bp = &buf[i]; 176 bzero(bp, sizeof *bp); 177 bp->b_flags = B_INVAL; /* we're just an empty header */ 178 bp->b_dev = NODEV; 179 bp->b_rcred = NOCRED; 180 bp->b_wcred = NOCRED; 181 bp->b_qindex = QUEUE_EMPTY; | 15 */ 16 17/* 18 * this file contains a new buffer I/O scheme implementing a coherent 19 * VM object and buffer cache scheme. Pains have been taken to make 20 * sure that the performance degradation associated with schemes such 21 * as this is not realized. 22 * --- 151 unchanged lines hidden (view full) --- 174 for (i = 0; i < nbuf; i++) { 175 bp = &buf[i]; 176 bzero(bp, sizeof *bp); 177 bp->b_flags = B_INVAL; /* we're just an empty header */ 178 bp->b_dev = NODEV; 179 bp->b_rcred = NOCRED; 180 bp->b_wcred = NOCRED; 181 bp->b_qindex = QUEUE_EMPTY; |
| 182 bp->b_vnbufs.le_next = NOLIST; | 182 bp->b_xflags = 0; |
| 183 LIST_INIT(&bp->b_dep); 184 TAILQ_INSERT_TAIL(&bufqueues[QUEUE_EMPTY], bp, b_freelist); 185 LIST_INSERT_HEAD(&invalhash, bp, b_hash); 186 } 187/* 188 * maxbufspace is currently calculated to support all filesystem blocks 189 * to be 8K. If you happen to use a 16K filesystem, the size of the buffer 190 * cache is still the same as it would be for 8K filesystems. This --- 225 unchanged lines hidden (view full) --- 416 if ((oldflags & B_ASYNC) == 0) { 417 int rtval = biowait(bp); 418 brelse(bp); 419 return (rtval); 420 } 421 return (0); 422} 423 | 183 LIST_INIT(&bp->b_dep); 184 TAILQ_INSERT_TAIL(&bufqueues[QUEUE_EMPTY], bp, b_freelist); 185 LIST_INSERT_HEAD(&invalhash, bp, b_hash); 186 } 187/* 188 * maxbufspace is currently calculated to support all filesystem blocks 189 * to be 8K. If you happen to use a 16K filesystem, the size of the buffer 190 * cache is still the same as it would be for 8K filesystems. This --- 225 unchanged lines hidden (view full) --- 416 if ((oldflags & B_ASYNC) == 0) { 417 int rtval = biowait(bp); 418 brelse(bp); 419 return (rtval); 420 } 421 return (0); 422} 423 |
| 424__inline void | 424void |
| 425vfs_bio_need_satisfy(void) { 426 ++numfreebuffers; 427 if (!needsbuffer) 428 return; 429 if (numdirtybuffers < lodirtybuffers) { 430 needsbuffer &= ~(VFS_BIO_NEED_ANY | VFS_BIO_NEED_LOWLIMIT); 431 } else { 432 needsbuffer &= ~VFS_BIO_NEED_ANY; --- 1962 unchanged lines hidden --- | 425vfs_bio_need_satisfy(void) { 426 ++numfreebuffers; 427 if (!needsbuffer) 428 return; 429 if (numdirtybuffers < lodirtybuffers) { 430 needsbuffer &= ~(VFS_BIO_NEED_ANY | VFS_BIO_NEED_LOWLIMIT); 431 } else { 432 needsbuffer &= ~VFS_BIO_NEED_ANY; --- 1962 unchanged lines hidden --- |