| vfs_bio.c (112569) | vfs_bio.c (112694) |
|---|---|
| 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 * $FreeBSD: head/sys/kern/vfs_bio.c 112569 2003-03-25 00:07:06Z jake $ | 14 * $FreeBSD: head/sys/kern/vfs_bio.c 112694 2003-03-26 23:40:42Z tegge $ |
| 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 * --- 24 unchanged lines hidden (view full) --- 47#include <vm/vm.h> 48#include <vm/vm_param.h> 49#include <vm/vm_kern.h> 50#include <vm/vm_pageout.h> 51#include <vm/vm_page.h> 52#include <vm/vm_object.h> 53#include <vm/vm_extern.h> 54#include <vm/vm_map.h> | 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 * --- 24 unchanged lines hidden (view full) --- 47#include <vm/vm.h> 48#include <vm/vm_param.h> 49#include <vm/vm_kern.h> 50#include <vm/vm_pageout.h> 51#include <vm/vm_page.h> 52#include <vm/vm_object.h> 53#include <vm/vm_extern.h> 54#include <vm/vm_map.h> |
| 55#include "opt_directio.h" 56#include "opt_swap.h" |
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| 55 56static MALLOC_DEFINE(M_BIOBUF, "BIO buffer", "BIO buffer"); 57 58struct bio_ops bioops; /* I/O operation notification */ 59 60struct buf_ops buf_ops_bio = { 61 "buf_ops_bio", 62 bwrite --- 178 unchanged lines hidden (view full) --- 241 */ 242const char *buf_wmesg = BUF_WMESG; 243 244#define VFS_BIO_NEED_ANY 0x01 /* any freeable buffer */ 245#define VFS_BIO_NEED_DIRTYFLUSH 0x02 /* waiting for dirty buffer flush */ 246#define VFS_BIO_NEED_FREE 0x04 /* wait for free bufs, hi hysteresis */ 247#define VFS_BIO_NEED_BUFSPACE 0x08 /* wait for buf space, lo hysteresis */ 248 | 57 58static MALLOC_DEFINE(M_BIOBUF, "BIO buffer", "BIO buffer"); 59 60struct bio_ops bioops; /* I/O operation notification */ 61 62struct buf_ops buf_ops_bio = { 63 "buf_ops_bio", 64 bwrite --- 178 unchanged lines hidden (view full) --- 243 */ 244const char *buf_wmesg = BUF_WMESG; 245 246#define VFS_BIO_NEED_ANY 0x01 /* any freeable buffer */ 247#define VFS_BIO_NEED_DIRTYFLUSH 0x02 /* waiting for dirty buffer flush */ 248#define VFS_BIO_NEED_FREE 0x04 /* wait for free bufs, hi hysteresis */ 249#define VFS_BIO_NEED_BUFSPACE 0x08 /* wait for buf space, lo hysteresis */ 250 |
| 251#ifdef DIRECTIO 252extern void ffs_rawread_setup(void); 253#endif /* DIRECTIO */ |
|
| 249/* 250 * numdirtywakeup: 251 * 252 * If someone is blocked due to there being too many dirty buffers, 253 * and numdirtybuffers is now reasonable, wake them up. 254 */ 255 256static __inline void --- 201 unchanged lines hidden (view full) --- 458 } 459#endif 460 461 /* 462 * swbufs are used as temporary holders for I/O, such as paging I/O. 463 * We have no less then 16 and no more then 256. 464 */ 465 nswbuf = max(min(nbuf/4, 256), 16); | 254/* 255 * numdirtywakeup: 256 * 257 * If someone is blocked due to there being too many dirty buffers, 258 * and numdirtybuffers is now reasonable, wake them up. 259 */ 260 261static __inline void --- 201 unchanged lines hidden (view full) --- 463 } 464#endif 465 466 /* 467 * swbufs are used as temporary holders for I/O, such as paging I/O. 468 * We have no less then 16 and no more then 256. 469 */ 470 nswbuf = max(min(nbuf/4, 256), 16); |
| 471#ifdef NSWBUF_MIN 472 if (nswbuf < NSWBUF_MIN) 473 nswbuf = NSWBUF_MIN; 474#endif 475#ifdef DIRECTIO 476 ffs_rawread_setup(); 477#endif |
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| 466 467 /* 468 * Reserve space for the buffer cache buffers 469 */ 470 swbuf = (void *)v; 471 v = (caddr_t)(swbuf + nswbuf); 472 buf = (void *)v; 473 v = (caddr_t)(buf + nbuf); --- 3289 unchanged lines hidden --- | 478 479 /* 480 * Reserve space for the buffer cache buffers 481 */ 482 swbuf = (void *)v; 483 v = (caddr_t)(swbuf + nswbuf); 484 buf = (void *)v; 485 v = (caddr_t)(buf + nbuf); --- 3289 unchanged lines hidden --- |