Eliminated many redundant vm_map_lookup operations for vm_mmap.

Speed up for vfs_bio -- addition of a routine bqrelse to greatly diminish
	overhead for merged cache.
Efficiency improvement for vfs_cluster.  It used to do alot of redundant
	calls to cluster_rbuild.
Correct the ordering for vrele of .text and release of credentials.
Use the selective tlb update for 486/586/P6.
Numerous fixes to the size of objects allocated for files.  Additionally,
	fixes in the various pagers.
Fixes for proper positioning of vnode_pager_setsize in msdosfs and ext2fs.
Fixes in the swap pager for exhausted resources.  The pageout code
	will not as readily thrash.
Change the page queue flags (PG_ACTIVE, PG_INACTIVE, PG_FREE, PG_CACHE) into
	page queue indices (PQ_ACTIVE, PQ_INACTIVE, PQ_FREE, PQ_CACHE),
	thereby improving efficiency of several routines.
Eliminate even more unnecessary vm_page_protect operations.
Significantly speed up process forks.
Make vm_object_page_clean more efficient, thereby eliminating the pause
	that happens every 30seconds.
Make sequential clustered writes B_ASYNC instead of B_DELWRI even in the
	case of filesystems mounted async.
Fix a panic with busy pages when write clustering is done for non-VMIO
	buffers.

6 files changed, 22 insertions, 18 deletions

diff --git a/sys/ufs/ffs/ffs_balloc.c b/sys/ufs/ffs/ffs_balloc.c
index cbe9c60..005fea6 100644
--- a/sys/ufs/ffs/ffs_balloc.c
+++ b/sys/ufs/ffs/ffs_balloc.c
@@ -31,7 +31,7 @@
  * SUCH DAMAGE.
  *
  *	@(#)ffs_balloc.c	8.4 (Berkeley) 9/23/93
- * $Id: ffs_balloc.c,v 1.8 1995/05/28 04:32:23 davidg Exp $
+ * $Id: ffs_balloc.c,v 1.9 1995/05/30 08:14:59 rgrimes Exp $
  */
 
 #include <sys/param.h>
@@ -210,7 +210,7 @@ ffs_balloc(ip, bn, size, cred, bpp, flags)
 			break;
 		i += 1;
 		if (nb != 0) {
-			brelse(bp);
+			bqrelse(bp);
 			continue;
 		}
 		if (pref == 0)
diff --git a/sys/ufs/ffs/ffs_inode.c b/sys/ufs/ffs/ffs_inode.c
index 8c99d2b..63186c6 100644
--- a/sys/ufs/ffs/ffs_inode.c
+++ b/sys/ufs/ffs/ffs_inode.c
@@ -31,7 +31,7 @@
  * SUCH DAMAGE.
  *
  *	@(#)ffs_inode.c	8.5 (Berkeley) 12/30/93
- * $Id: ffs_inode.c,v 1.18 1995/12/11 04:57:37 dyson Exp $
+ * $Id: ffs_inode.c,v 1.19 1996/01/05 18:31:48 wollman Exp $
  */
 
 #include "opt_quota.h"
@@ -220,6 +220,7 @@ ffs_truncate(ap)
 		aflags = B_CLRBUF;
 		if (ap->a_flags & IO_SYNC)
 			aflags |= B_SYNC;
+		vnode_pager_setsize(ovp, length);
 		error = ffs_balloc(oip, lbn, offset + 1, ap->a_cred,
 		    &bp, aflags);
 		if (error)
@@ -231,7 +232,6 @@ ffs_truncate(ap)
 			bdwrite(bp);
 		else
 			bawrite(bp);
-		vnode_pager_setsize(ovp, length);
 		oip->i_flag |= IN_CHANGE | IN_UPDATE;
 		return (VOP_UPDATE(ovp, &tv, &tv, 1));
 	}
@@ -290,7 +290,7 @@ ffs_truncate(ap)
 	for (i = NDADDR - 1; i > lastblock; i--)
 		oip->i_db[i] = 0;
 	oip->i_flag |= IN_CHANGE | IN_UPDATE;
-	error = VOP_UPDATE(ovp, &tv, &tv, 0);
+	error = VOP_UPDATE(ovp, &tv, &tv, ((length > 0) ? 0 : 1));
 	if (error)
 		allerror = error;
 	/*
diff --git a/sys/ufs/ffs/ffs_vfsops.c b/sys/ufs/ffs/ffs_vfsops.c
index e310708..7fe9299 100644
--- a/sys/ufs/ffs/ffs_vfsops.c
+++ b/sys/ufs/ffs/ffs_vfsops.c
@@ -31,7 +31,7 @@
  * SUCH DAMAGE.
  *
  *	@(#)ffs_vfsops.c	8.8 (Berkeley) 4/18/94
- * $Id: ffs_vfsops.c,v 1.33 1996/01/05 18:31:49 wollman Exp $
+ * $Id: ffs_vfsops.c,v 1.34 1996/01/14 18:54:59 bde Exp $
  */
 
 #include "opt_quota.h"
@@ -908,13 +908,13 @@ restart:
 		 * still zero, it will be unlinked and returned to the free
 		 * list by vput().
 		 */
-		vput(vp);
 		brelse(bp);
+		vput(vp);
 		*vpp = NULL;
 		return (error);
 	}
 	ip->i_din = *((struct dinode *)bp->b_data + ino_to_fsbo(fs, ino));
-	brelse(bp);
+	bqrelse(bp);
 
 	/*
 	 * Initialize the vnode from the inode, check for aliases.
diff --git a/sys/ufs/ufs/ufs_bmap.c b/sys/ufs/ufs/ufs_bmap.c
index c8b3cd4..2b2531d 100644
--- a/sys/ufs/ufs/ufs_bmap.c
+++ b/sys/ufs/ufs/ufs_bmap.c
@@ -36,7 +36,7 @@
  * SUCH DAMAGE.
  *
  *	@(#)ufs_bmap.c	8.6 (Berkeley) 1/21/94
- * $Id: ufs_bmap.c,v 1.9 1995/09/04 00:21:09 dyson Exp $
+ * $Id: ufs_bmap.c,v 1.10 1995/11/05 23:07:37 dyson Exp $
  */
 
 #include <sys/param.h>
@@ -188,7 +188,7 @@ ufs_bmaparray(vp, bn, bnp, ap, nump, runp, runb)
 		 * or we have a disk address for it, go fetch it.
 		 */
 		if (bp)
-			brelse(bp);
+			bqrelse(bp);
 
 		xap->in_exists = 1;
 		bp = getblk(vp, metalbn, mp->mnt_stat.f_iosize, 0, 0);
@@ -226,7 +226,7 @@ ufs_bmaparray(vp, bn, bnp, ap, nump, runp, runb)
 		}
 	}
 	if (bp)
-		brelse(bp);
+		bqrelse(bp);
 
 	daddr = blkptrtodb(ump, daddr);
 	*bnp = daddr == 0 ? -1 : daddr;
diff --git a/sys/ufs/ufs/ufs_readwrite.c b/sys/ufs/ufs/ufs_readwrite.c
index 582595c..8edb6a4 100644
--- a/sys/ufs/ufs/ufs_readwrite.c
+++ b/sys/ufs/ufs/ufs_readwrite.c
@@ -31,7 +31,7 @@
  * SUCH DAMAGE.
  *
  *	@(#)ufs_readwrite.c	8.7 (Berkeley) 1/21/94
- * $Id: ufs_readwrite.c,v 1.18 1996/01/06 12:49:53 phk Exp $
+ * $Id: ufs_readwrite.c,v 1.19 1996/01/07 09:42:36 phk Exp $
  */
 
 #ifdef LFS_READWRITE
@@ -107,6 +107,7 @@ READ(ap)
 		nextlbn = lbn + 1;
 		size = BLKSIZE(fs, ip, lbn);
 		blkoffset = blkoff(fs, uio->uio_offset);
+
 		xfersize = fs->fs_bsize - blkoffset;
 		if (uio->uio_resid < xfersize)
 			xfersize = uio->uio_resid;
@@ -129,8 +130,11 @@ READ(ap)
 		} else
 			error = bread(vp, lbn, size, NOCRED, &bp);
 #endif
-		if (error)
+		if (error) {
+			brelse(bp);
+			bp = NULL;
 			break;
+		}
 		vp->v_lastr = lbn;
 
 		/*
@@ -155,10 +159,10 @@ READ(ap)
 		if (error)
 			break;
 
-		brelse(bp);
+		bqrelse(bp);
 	}
 	if (bp != NULL)
-		brelse(bp);
+		bqrelse(bp);
 	ip->i_flag |= IN_ACCESS;
 	return (error);
 }
@@ -280,8 +284,7 @@ WRITE(ap)
 
 		if (ioflag & IO_SYNC) {
 			(void)bwrite(bp);
-		} else if (xfersize + blkoffset == fs->fs_bsize &&
-			(vp->v_mount->mnt_flag & MNT_ASYNC) == 0) {
+		} else if (xfersize + blkoffset == fs->fs_bsize) {
 			if (doclusterwrite) {
 				bp->b_flags |= B_CLUSTEROK;
 				cluster_write(bp, ip->i_size);
diff --git a/sys/ufs/ufs/ufs_vnops.c b/sys/ufs/ufs/ufs_vnops.c
index 4ac9bbb..4b60aaa 100644
--- a/sys/ufs/ufs/ufs_vnops.c
+++ b/sys/ufs/ufs/ufs_vnops.c
@@ -36,7 +36,7 @@
  * SUCH DAMAGE.
  *
  *	@(#)ufs_vnops.c	8.10 (Berkeley) 4/1/94
- * $Id: ufs_vnops.c,v 1.35 1995/12/11 04:57:49 dyson Exp $
+ * $Id: ufs_vnops.c,v 1.36 1996/01/05 18:31:58 wollman Exp $
  */
 
 #include "opt_quota.h"
@@ -2131,6 +2131,7 @@ ufs_makeinode(mode, dvp, vpp, cnp)
 #endif  /* EXT2FS */
 	if (error)
 		goto bad;
+
 	if ((cnp->cn_flags & SAVESTART) == 0)
 		FREE(cnp->cn_pnbuf, M_NAMEI);
 	vput(dvp);