mirror of
https://github.com/freebsd/freebsd-src.git
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Add better support for larger I/O clusters, including larger physical
I/O. The support is not mature yet, and some of the underlying implementation needs help. However, support does exist for IDE devices now.
This commit is contained in:
John Dyson
parent
4147817ab9
commit
50ce7ff499
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=32724
@ -35,7 +35,7 @@
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* SUCH DAMAGE.
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*
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* from: @(#)machdep.c 7.4 (Berkeley) 6/3/91
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* $Id: machdep.c,v 1.281 1998/01/12 05:16:03 dyson Exp $
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* $Id: machdep.c,v 1.282 1998/01/22 17:29:26 dyson Exp $
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*/
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#include "apm.h"
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@ -302,7 +302,7 @@ again:
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if( physmem > 1024)
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nbuf += min((physmem - 1024) / 8, 2048);
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}
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nswbuf = max(min(nbuf/4, 128), 16);
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nswbuf = max(min(nbuf/4, 64), 16);
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valloc(swbuf, struct buf, nswbuf);
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valloc(buf, struct buf, nbuf);
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@ -36,7 +36,7 @@
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* SUCH DAMAGE.
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*
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* @(#)ufs_bmap.c 8.7 (Berkeley) 3/21/95
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* $Id: ufs_bmap.c,v 1.16 1997/09/02 20:06:56 bde Exp $
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* $Id: ufs_bmap.c,v 1.17 1997/11/24 16:33:03 bde Exp $
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*/
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#include <sys/param.h>
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@ -46,11 +46,13 @@
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#include <sys/vnode.h>
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#include <sys/mount.h>
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#include <sys/resourcevar.h>
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#include <sys/conf.h>
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#include <ufs/ufs/quota.h>
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#include <ufs/ufs/inode.h>
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#include <ufs/ufs/ufsmount.h>
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#include <ufs/ufs/ufs_extern.h>
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#include <miscfs/specfs/specdev.h>
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/*
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* Bmap converts a the logical block number of a file to its physical block
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@ -124,18 +126,48 @@ ufs_bmaparray(vp, bn, bnp, ap, nump, runp, runb)
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#endif
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if (runp) {
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*runp = 0;
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}
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if (runb) {
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*runb = 0;
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}
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maxrun = 0;
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if (runp || runb || (vp->v_maxio == 0)) {
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struct vnode *devvp;
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int blksize;
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blksize = mp->mnt_stat.f_iosize;
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/*
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* XXX
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* If MAXPHYS is the largest transfer the disks can handle,
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* we probably want maxrun to be 1 block less so that we
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* don't create a block larger than the device can handle.
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*/
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*runp = 0;
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maxrun = MAXPHYS / mp->mnt_stat.f_iosize - 1;
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}
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devvp = ip->i_devvp;
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if (runb) {
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*runb = 0;
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if (devvp && devvp->v_type == VBLK &&
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(devvp->v_rdev != NODEV) &&
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(major(devvp->v_rdev) < nblkdev)) {
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if (bdevsw[major(devvp->v_rdev)]->d_maxio > MAXPHYS) {
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maxrun = MAXPHYS;
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vp->v_maxio = MAXPHYS;
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} else {
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maxrun = bdevsw[major(devvp->v_rdev)]->d_maxio;
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vp->v_maxio = bdevsw[major(devvp->v_rdev)]->d_maxio;
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}
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maxrun = maxrun / blksize;
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maxrun -= 1;
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}
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if (maxrun == 0) {
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vp->v_maxio = DFLTPHYS;
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maxrun = DFLTPHYS / blksize;
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maxrun -= 1;
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}
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}
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xap = ap == NULL ? a : ap;
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@ -36,7 +36,7 @@
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* SUCH DAMAGE.
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*
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* @(#)ufs_bmap.c 8.7 (Berkeley) 3/21/95
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* $Id: ufs_bmap.c,v 1.16 1997/09/02 20:06:56 bde Exp $
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* $Id: ufs_bmap.c,v 1.17 1997/11/24 16:33:03 bde Exp $
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*/
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#include <sys/param.h>
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@ -46,11 +46,13 @@
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#include <sys/vnode.h>
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#include <sys/mount.h>
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#include <sys/resourcevar.h>
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#include <sys/conf.h>
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#include <ufs/ufs/quota.h>
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#include <ufs/ufs/inode.h>
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#include <ufs/ufs/ufsmount.h>
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#include <ufs/ufs/ufs_extern.h>
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#include <miscfs/specfs/specdev.h>
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/*
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* Bmap converts a the logical block number of a file to its physical block
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@ -124,18 +126,48 @@ ufs_bmaparray(vp, bn, bnp, ap, nump, runp, runb)
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#endif
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if (runp) {
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*runp = 0;
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}
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if (runb) {
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*runb = 0;
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}
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maxrun = 0;
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if (runp || runb || (vp->v_maxio == 0)) {
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struct vnode *devvp;
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int blksize;
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blksize = mp->mnt_stat.f_iosize;
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/*
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* XXX
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* If MAXPHYS is the largest transfer the disks can handle,
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* we probably want maxrun to be 1 block less so that we
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* don't create a block larger than the device can handle.
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*/
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*runp = 0;
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maxrun = MAXPHYS / mp->mnt_stat.f_iosize - 1;
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}
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devvp = ip->i_devvp;
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if (runb) {
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*runb = 0;
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if (devvp && devvp->v_type == VBLK &&
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(devvp->v_rdev != NODEV) &&
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(major(devvp->v_rdev) < nblkdev)) {
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if (bdevsw[major(devvp->v_rdev)]->d_maxio > MAXPHYS) {
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maxrun = MAXPHYS;
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vp->v_maxio = MAXPHYS;
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} else {
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maxrun = bdevsw[major(devvp->v_rdev)]->d_maxio;
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vp->v_maxio = bdevsw[major(devvp->v_rdev)]->d_maxio;
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}
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maxrun = maxrun / blksize;
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maxrun -= 1;
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}
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if (maxrun == 0) {
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vp->v_maxio = DFLTPHYS;
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maxrun = DFLTPHYS / blksize;
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maxrun -= 1;
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}
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}
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xap = ap == NULL ? a : ap;
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@ -35,7 +35,7 @@
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* SUCH DAMAGE.
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*
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* from: @(#)machdep.c 7.4 (Berkeley) 6/3/91
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* $Id: machdep.c,v 1.281 1998/01/12 05:16:03 dyson Exp $
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* $Id: machdep.c,v 1.282 1998/01/22 17:29:26 dyson Exp $
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*/
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#include "apm.h"
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@ -302,7 +302,7 @@ again:
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if( physmem > 1024)
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nbuf += min((physmem - 1024) / 8, 2048);
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}
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nswbuf = max(min(nbuf/4, 128), 16);
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nswbuf = max(min(nbuf/4, 64), 16);
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valloc(swbuf, struct buf, nswbuf);
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valloc(buf, struct buf, nbuf);
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@ -34,7 +34,7 @@
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* SUCH DAMAGE.
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*
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* from: @(#)param.h 5.8 (Berkeley) 6/28/91
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* $Id: param.h,v 1.16 1997/08/30 01:22:01 smp Exp smp $
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* $Id: param.h,v 1.41 1997/08/30 08:07:50 fsmp Exp $
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*/
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#ifndef _MACHINE_PARAM_H_
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@ -76,7 +76,8 @@
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#define DEV_BSIZE (1<<DEV_BSHIFT)
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#define BLKDEV_IOSIZE 2048
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#define MAXPHYS (64 * 1024) /* max raw I/O transfer size */
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#define DFLTPHYS (64 * 1024) /* default max raw I/O transfer size */
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#define MAXPHYS (128 * 1024) /* max raw I/O transfer size */
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#define IOPAGES 2 /* pages of i/o permission bitmap */
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#define UPAGES 2 /* pages of u-area */
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@ -34,7 +34,7 @@
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* SUCH DAMAGE.
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*
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* from: @(#)wd.c 7.2 (Berkeley) 5/9/91
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* $Id: wd.c,v 1.146 1997/12/06 14:27:20 bde Exp $
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* $Id: wd.c,v 1.147 1998/01/16 22:13:06 pst Exp $
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*/
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/* TODO:
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@ -2429,6 +2429,8 @@ static void wd_drvinit(void *unused)
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{
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if( ! wd_devsw_installed ) {
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if (wd_bdevsw.d_maxio == 0)
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wd_bdevsw.d_maxio = 248 * 512;
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bdevsw_add_generic(BDEV_MAJOR,CDEV_MAJOR, &wd_bdevsw);
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wd_devsw_installed = 1;
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}
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@ -16,7 +16,7 @@
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* 4. Modifications may be freely made to this file if the above conditions
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* are met.
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*
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* $Id: kern_physio.c,v 1.21 1997/08/26 00:15:04 bde Exp $
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* $Id: kern_physio.c,v 1.22 1997/09/02 20:05:40 bde Exp $
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*/
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#include <sys/param.h>
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@ -28,6 +28,7 @@
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#include <vm/vm_extern.h>
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static void physwakeup __P((struct buf *bp));
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static struct buf * phygetvpbuf(dev_t dev, int resid);
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int
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physio(strategy, bp, dev, rw, minp, uio)
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@ -52,7 +53,7 @@ physio(strategy, bp, dev, rw, minp, uio)
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curproc->p_flag |= P_PHYSIO;
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/* create and build a buffer header for a transfer */
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bpa = (struct buf *)getpbuf();
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bpa = (struct buf *)phygetvpbuf(dev, uio->uio_resid);
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if (!bp_alloc) {
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spl = splbio();
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while (bp->b_flags & B_BUSY) {
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@ -70,12 +71,12 @@ physio(strategy, bp, dev, rw, minp, uio)
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*/
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sa = bpa->b_data;
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bp->b_proc = curproc;
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bp->b_dev = dev;
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error = bp->b_error = 0;
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for(i=0;i<uio->uio_iovcnt;i++) {
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while( uio->uio_iov[i].iov_len) {
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bp->b_dev = dev;
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bp->b_bcount = uio->uio_iov[i].iov_len;
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bp->b_flags = B_BUSY | B_PHYS | B_CALL | bufflags;
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bp->b_iodone = physwakeup;
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@ -168,18 +169,46 @@ u_int
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minphys(bp)
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struct buf *bp;
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{
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u_int maxphys = MAXPHYS;
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u_int maxphys = DFLTPHYS;
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struct bdevsw *bdsw;
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int offset;
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if( ((vm_offset_t) bp->b_data) & PAGE_MASK) {
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maxphys = MAXPHYS - PAGE_SIZE;
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bdsw = cdevsw[major(bp->b_dev)]->d_bdev;
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if (bdsw && bdsw->d_maxio) {
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maxphys = bdsw->d_maxio;
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}
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if (bp->b_kvasize < maxphys)
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maxphys = bp->b_kvasize;
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if(((vm_offset_t) bp->b_data) & PAGE_MASK) {
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maxphys -= PAGE_SIZE;
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}
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if( bp->b_bcount > maxphys) {
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bp->b_bcount = maxphys;
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}
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return bp->b_bcount;
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}
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struct buf *
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phygetvpbuf(dev_t dev, int resid)
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{
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struct bdevsw *bdsw;
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int maxio;
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bdsw = cdevsw[major(dev)]->d_bdev;
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if (bdsw == NULL)
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return getpbuf();
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maxio = bdsw->d_maxio;
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if (resid > maxio)
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resid = maxio;
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return getpbuf();
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}
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int
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rawread(dev, uio, ioflag)
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dev_t dev;
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@ -11,7 +11,7 @@
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* 2. Absolutely no warranty of function or purpose is made by the author
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* John S. Dyson.
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*
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* $Id: vfs_bio.c,v 1.143 1998/01/17 09:16:26 dyson Exp $
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* $Id: vfs_bio.c,v 1.144 1998/01/22 17:29:51 dyson Exp $
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*/
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/*
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@ -1132,17 +1132,26 @@ findkvaspace:
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if (vm_map_findspace(buffer_map,
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vm_map_min(buffer_map), maxsize, &addr)) {
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if (kvafreespace > 0) {
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int tfree = 0;
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for (bp1 = TAILQ_FIRST(&bufqueues[QUEUE_EMPTY]);
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bp1 != NULL; bp1 = TAILQ_NEXT(bp1, b_freelist))
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if (bp1->b_kvasize != 0) {
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tfree += bp1->b_kvasize;
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bremfree(bp1);
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bfreekva(bp1);
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brelse(bp1);
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if (tfree >= maxsize)
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goto findkvaspace;
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int totfree = 0, freed;
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do {
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freed = 0;
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for (bp1 = TAILQ_FIRST(&bufqueues[QUEUE_EMPTY]);
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bp1 != NULL; bp1 = TAILQ_NEXT(bp1, b_freelist)) {
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if (bp1->b_kvasize != 0) {
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totfree += bp1->b_kvasize;
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freed = bp1->b_kvasize;
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bremfree(bp1);
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bfreekva(bp1);
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brelse(bp1);
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break;
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}
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}
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} while (freed);
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/*
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* if we found free space, then retry with the same buffer.
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*/
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if (totfree)
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goto findkvaspace;
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}
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bp->b_flags |= B_INVAL;
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brelse(bp);
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@ -33,7 +33,7 @@
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* SUCH DAMAGE.
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*
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* @(#)vfs_cluster.c 8.7 (Berkeley) 2/13/94
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* $Id: vfs_cluster.c,v 1.49 1997/11/07 08:53:05 phk Exp $
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* $Id: vfs_cluster.c,v 1.50 1998/01/06 05:16:01 dyson Exp $
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*/
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#include <sys/param.h>
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@ -92,12 +92,14 @@ cluster_read(vp, filesize, lblkno, size, cred, totread, seqcount, bpp)
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long origtotread;
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error = 0;
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if (vp->v_maxio == 0)
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vp->v_maxio = DFLTPHYS;
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/*
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* Try to limit the amount of read-ahead by a few
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* ad-hoc parameters. This needs work!!!
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*/
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racluster = MAXPHYS/size;
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racluster = vp->v_maxio/size;
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maxra = 2 * racluster + (totread / size);
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if (maxra > MAXRA)
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maxra = MAXRA;
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@ -356,11 +358,13 @@ cluster_rbuild(vp, filesize, lbn, blkno, size, run, fbp)
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bp->b_bufsize = 0;
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bp->b_npages = 0;
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if (vp->v_maxio == 0)
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vp->v_maxio = DFLTPHYS;
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inc = btodb(size);
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for (bn = blkno, i = 0; i < run; ++i, bn += inc) {
|
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if (i != 0) {
|
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if ((bp->b_npages * PAGE_SIZE) +
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round_page(size) > MAXPHYS)
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round_page(size) > vp->v_maxio)
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break;
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if (incore(vp, lbn + i))
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@ -492,6 +496,8 @@ cluster_write(bp, filesize)
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int async;
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vp = bp->b_vp;
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if (vp->v_maxio == 0)
|
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vp->v_maxio = DFLTPHYS;
|
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if (vp->v_type == VREG) {
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async = vp->v_mount->mnt_flag & MNT_ASYNC;
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lblocksize = vp->v_mount->mnt_stat.f_iosize;
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@ -507,7 +513,7 @@ cluster_write(bp, filesize)
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if (vp->v_clen == 0 || lbn != vp->v_lastw + 1 ||
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(bp->b_blkno != vp->v_lasta + btodb(lblocksize))) {
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maxclen = MAXPHYS / lblocksize - 1;
|
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maxclen = vp->v_maxio / lblocksize - 1;
|
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if (vp->v_clen != 0) {
|
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/*
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* Next block is not sequential.
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@ -703,7 +709,7 @@ cluster_wbuild(vp, size, start_lbn, len)
|
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|
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if ((tbp->b_bcount != size) ||
|
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((bp->b_blkno + dbsize * i) != tbp->b_blkno) ||
|
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((tbp->b_npages + bp->b_npages) > (MAXPHYS / PAGE_SIZE))) {
|
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((tbp->b_npages + bp->b_npages) > (vp->v_maxio / PAGE_SIZE))) {
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splx(s);
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break;
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}
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@ -36,7 +36,7 @@
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* SUCH DAMAGE.
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*
|
||||
* @(#)vfs_subr.c 8.31 (Berkeley) 5/26/95
|
||||
* $Id: vfs_subr.c,v 1.124 1998/01/17 09:16:28 dyson Exp $
|
||||
* $Id: vfs_subr.c,v 1.125 1998/01/22 17:29:52 dyson Exp $
|
||||
*/
|
||||
|
||||
/*
|
||||
@ -458,6 +458,7 @@ getnewvnode(tag, mp, vops, vpp)
|
||||
vp->v_clen = 0;
|
||||
vp->v_socket = 0;
|
||||
vp->v_writecount = 0; /* XXX */
|
||||
vp->v_maxio = 0;
|
||||
} else {
|
||||
simple_unlock(&vnode_free_list_slock);
|
||||
vp = (struct vnode *) zalloc(vnode_zone);
|
||||
|
||||
@ -36,7 +36,7 @@
|
||||
* SUCH DAMAGE.
|
||||
*
|
||||
* @(#)vfs_subr.c 8.31 (Berkeley) 5/26/95
|
||||
* $Id: vfs_subr.c,v 1.124 1998/01/17 09:16:28 dyson Exp $
|
||||
* $Id: vfs_subr.c,v 1.125 1998/01/22 17:29:52 dyson Exp $
|
||||
*/
|
||||
|
||||
/*
|
||||
@ -458,6 +458,7 @@ getnewvnode(tag, mp, vops, vpp)
|
||||
vp->v_clen = 0;
|
||||
vp->v_socket = 0;
|
||||
vp->v_writecount = 0; /* XXX */
|
||||
vp->v_maxio = 0;
|
||||
} else {
|
||||
simple_unlock(&vnode_free_list_slock);
|
||||
vp = (struct vnode *) zalloc(vnode_zone);
|
||||
|
||||
@ -36,7 +36,7 @@
|
||||
* SUCH DAMAGE.
|
||||
*
|
||||
* @(#)conf.h 8.5 (Berkeley) 1/9/95
|
||||
* $Id: conf.h,v 1.36 1997/09/27 13:39:46 kato Exp $
|
||||
* $Id: conf.h,v 1.37 1997/11/22 08:35:42 bde Exp $
|
||||
*/
|
||||
|
||||
#ifndef _SYS_CONF_H_
|
||||
@ -108,6 +108,7 @@ struct bdevsw {
|
||||
char *d_name; /* name of the driver e.g. audio */
|
||||
struct cdevsw *d_cdev; /* cross pointer to the cdev */
|
||||
int d_maj; /* the major number we were assigned */
|
||||
int d_maxio;
|
||||
};
|
||||
|
||||
#ifdef KERNEL
|
||||
|
||||
@ -36,7 +36,7 @@
|
||||
* SUCH DAMAGE.
|
||||
*
|
||||
* @(#)conf.h 8.5 (Berkeley) 1/9/95
|
||||
* $Id: conf.h,v 1.36 1997/09/27 13:39:46 kato Exp $
|
||||
* $Id: conf.h,v 1.37 1997/11/22 08:35:42 bde Exp $
|
||||
*/
|
||||
|
||||
#ifndef _SYS_CONF_H_
|
||||
@ -108,6 +108,7 @@ struct bdevsw {
|
||||
char *d_name; /* name of the driver e.g. audio */
|
||||
struct cdevsw *d_cdev; /* cross pointer to the cdev */
|
||||
int d_maj; /* the major number we were assigned */
|
||||
int d_maxio;
|
||||
};
|
||||
|
||||
#ifdef KERNEL
|
||||
|
||||
@ -31,7 +31,7 @@
|
||||
* SUCH DAMAGE.
|
||||
*
|
||||
* @(#)vnode.h 8.7 (Berkeley) 2/4/94
|
||||
* $Id: vnode.h,v 1.64 1998/01/12 01:44:08 dyson Exp $
|
||||
* $Id: vnode.h,v 1.65 1998/01/17 09:16:39 dyson Exp $
|
||||
*/
|
||||
|
||||
#ifndef _SYS_VNODE_H_
|
||||
@ -107,6 +107,7 @@ struct vnode {
|
||||
daddr_t v_cstart; /* start block of cluster */
|
||||
daddr_t v_lasta; /* last allocation */
|
||||
int v_clen; /* length of current cluster */
|
||||
int v_maxio; /* maximum I/O cluster size */
|
||||
struct vm_object *v_object; /* Place to store VM object */
|
||||
struct simplelock v_interlock; /* lock on usecount and flag */
|
||||
struct lock *v_vnlock; /* used for non-locking fs's */
|
||||
|
||||
@ -31,7 +31,7 @@
|
||||
* SUCH DAMAGE.
|
||||
*
|
||||
* @(#)lfs_segment.c 8.10 (Berkeley) 6/10/95
|
||||
* $Id: lfs_segment.c,v 1.25 1997/10/16 11:58:30 phk Exp $
|
||||
* $Id: lfs_segment.c,v 1.26 1997/12/02 21:07:17 phk Exp $
|
||||
*/
|
||||
|
||||
#include <sys/param.h>
|
||||
@ -931,7 +931,7 @@ lfs_writeseg(fs, sp)
|
||||
/*
|
||||
* When we simply write the blocks we lose a rotation for every block
|
||||
* written. To avoid this problem, we allocate memory in chunks, copy
|
||||
* the buffers into the chunk and write the chunk. MAXPHYS is the
|
||||
* the buffers into the chunk and write the chunk. DFLTPHYS is the
|
||||
* largest size I/O devices can handle.
|
||||
* When the data is copied to the chunk, turn off the the B_LOCKED bit
|
||||
* and brelse the buffer (which will move them to the LRU list). Add
|
||||
@ -945,16 +945,16 @@ lfs_writeseg(fs, sp)
|
||||
*/
|
||||
for (bpp = sp->bpp, i = nblocks; i;) {
|
||||
cbp = lfs_newbuf(VTOI(fs->lfs_ivnode)->i_devvp,
|
||||
(*bpp)->b_blkno, MAXPHYS);
|
||||
(*bpp)->b_blkno, DFLTPHYS);
|
||||
cbp->b_dev = i_dev;
|
||||
cbp->b_flags |= B_ASYNC | B_BUSY;
|
||||
cbp->b_bcount = 0;
|
||||
|
||||
s = splbio();
|
||||
++fs->lfs_iocount;
|
||||
for (p = cbp->b_data; i && cbp->b_bcount < MAXPHYS; i--) {
|
||||
for (p = cbp->b_data; i && cbp->b_bcount < DFLTPHYS; i--) {
|
||||
bp = *bpp;
|
||||
if (bp->b_bcount > (MAXPHYS - cbp->b_bcount))
|
||||
if (bp->b_bcount > (DFLTPHYS - cbp->b_bcount))
|
||||
break;
|
||||
bpp++;
|
||||
|
||||
|
||||
@ -36,7 +36,7 @@
|
||||
* SUCH DAMAGE.
|
||||
*
|
||||
* @(#)ufs_bmap.c 8.7 (Berkeley) 3/21/95
|
||||
* $Id: ufs_bmap.c,v 1.16 1997/09/02 20:06:56 bde Exp $
|
||||
* $Id: ufs_bmap.c,v 1.17 1997/11/24 16:33:03 bde Exp $
|
||||
*/
|
||||
|
||||
#include <sys/param.h>
|
||||
@ -46,11 +46,13 @@
|
||||
#include <sys/vnode.h>
|
||||
#include <sys/mount.h>
|
||||
#include <sys/resourcevar.h>
|
||||
#include <sys/conf.h>
|
||||
|
||||
#include <ufs/ufs/quota.h>
|
||||
#include <ufs/ufs/inode.h>
|
||||
#include <ufs/ufs/ufsmount.h>
|
||||
#include <ufs/ufs/ufs_extern.h>
|
||||
#include <miscfs/specfs/specdev.h>
|
||||
|
||||
/*
|
||||
* Bmap converts a the logical block number of a file to its physical block
|
||||
@ -124,18 +126,48 @@ ufs_bmaparray(vp, bn, bnp, ap, nump, runp, runb)
|
||||
#endif
|
||||
|
||||
if (runp) {
|
||||
*runp = 0;
|
||||
}
|
||||
|
||||
if (runb) {
|
||||
*runb = 0;
|
||||
}
|
||||
|
||||
maxrun = 0;
|
||||
if (runp || runb || (vp->v_maxio == 0)) {
|
||||
|
||||
struct vnode *devvp;
|
||||
int blksize;
|
||||
|
||||
blksize = mp->mnt_stat.f_iosize;
|
||||
|
||||
/*
|
||||
* XXX
|
||||
* If MAXPHYS is the largest transfer the disks can handle,
|
||||
* we probably want maxrun to be 1 block less so that we
|
||||
* don't create a block larger than the device can handle.
|
||||
*/
|
||||
*runp = 0;
|
||||
maxrun = MAXPHYS / mp->mnt_stat.f_iosize - 1;
|
||||
}
|
||||
devvp = ip->i_devvp;
|
||||
|
||||
if (runb) {
|
||||
*runb = 0;
|
||||
if (devvp && devvp->v_type == VBLK &&
|
||||
(devvp->v_rdev != NODEV) &&
|
||||
(major(devvp->v_rdev) < nblkdev)) {
|
||||
if (bdevsw[major(devvp->v_rdev)]->d_maxio > MAXPHYS) {
|
||||
maxrun = MAXPHYS;
|
||||
vp->v_maxio = MAXPHYS;
|
||||
} else {
|
||||
maxrun = bdevsw[major(devvp->v_rdev)]->d_maxio;
|
||||
vp->v_maxio = bdevsw[major(devvp->v_rdev)]->d_maxio;
|
||||
}
|
||||
maxrun = maxrun / blksize;
|
||||
maxrun -= 1;
|
||||
}
|
||||
|
||||
if (maxrun == 0) {
|
||||
vp->v_maxio = DFLTPHYS;
|
||||
maxrun = DFLTPHYS / blksize;
|
||||
maxrun -= 1;
|
||||
}
|
||||
}
|
||||
|
||||
xap = ap == NULL ? a : ap;
|
||||
|
||||
@ -61,7 +61,7 @@
|
||||
* any improvements or extensions that they make and grant Carnegie the
|
||||
* rights to redistribute these changes.
|
||||
*
|
||||
* $Id: vm_pager.c,v 1.30 1997/10/12 20:26:31 phk Exp $
|
||||
* $Id: vm_pager.c,v 1.31 1997/12/29 00:25:06 dyson Exp $
|
||||
*/
|
||||
|
||||
/*
|
||||
@ -136,13 +136,11 @@ vm_pager_bufferinit()
|
||||
/*
|
||||
* Now set up swap and physical I/O buffer headers.
|
||||
*/
|
||||
for (i = 0; i < nswbuf - 1; i++, bp++) {
|
||||
for (i = 0; i < nswbuf; i++, bp++) {
|
||||
TAILQ_INSERT_HEAD(&bswlist, bp, b_freelist);
|
||||
bp->b_rcred = bp->b_wcred = NOCRED;
|
||||
bp->b_vnbufs.le_next = NOLIST;
|
||||
}
|
||||
bp->b_rcred = bp->b_wcred = NOCRED;
|
||||
bp->b_vnbufs.le_next = NOLIST;
|
||||
|
||||
swapbkva = kmem_alloc_pageable(pager_map, nswbuf * MAXPHYS);
|
||||
if (!swapbkva)
|
||||
|
||||
Loading…
Reference in New Issue
Block a user