From 77f763b0e45aa847de453ff812761ad97045b8d8 Mon Sep 17 00:00:00 2001
From: dfr <dfr@FreeBSD.org>
Date: Tue, 3 Jun 1997 09:42:43 +0000
Subject: Fix some performance problems with the NFS mmap fixes.

---
 sys/kern/vfs_bio.c      | 8 ++++++--
 sys/nfs/nfs_bio.c       | 8 ++++----
 sys/nfsclient/nfs_bio.c | 8 ++++----
 3 files changed, 14 insertions(+), 10 deletions(-)

diff --git a/sys/kern/vfs_bio.c b/sys/kern/vfs_bio.c
index 44ebf79..5a18252 100644
--- a/sys/kern/vfs_bio.c
+++ b/sys/kern/vfs_bio.c
@@ -18,7 +18,7 @@
  * 5. Modifications may be freely made to this file if the above conditions
  *    are met.
  *
- * $Id: vfs_bio.c,v 1.116 1997/05/19 14:36:36 dfr Exp $
+ * $Id: vfs_bio.c,v 1.117 1997/05/30 22:25:35 dfr Exp $
  */
 
 /*
@@ -512,13 +512,17 @@ brelse(struct buf * bp)
 	 * flags in the vm_pages have only DEV_BSIZE resolution but
 	 * the b_validoff, b_validend fields have byte resolution.
 	 * This can avoid unnecessary re-reads of the buffer.
+	 * XXX this seems to cause performance problems.
 	 */
 	if ((bp->b_flags & B_VMIO)
+#ifdef notdef
 	    && (bp->b_vp->v_tag != VT_NFS
 		|| (bp->b_flags & (B_NOCACHE | B_INVAL | B_ERROR))
 		|| bp->b_validend == 0
 		|| (bp->b_validoff == 0
-		    && bp->b_validend == bp->b_bufsize))) {
+		    && bp->b_validend == bp->b_bufsize))
+#endif
+	    ) {
 		vm_ooffset_t foff;
 		vm_object_t obj;
 		int i, resid;
diff --git a/sys/nfs/nfs_bio.c b/sys/nfs/nfs_bio.c
index 2a02371..a6320b4 100644
--- a/sys/nfs/nfs_bio.c
+++ b/sys/nfs/nfs_bio.c
@@ -34,7 +34,7 @@
  * SUCH DAMAGE.
  *
  *	@(#)nfs_bio.c	8.9 (Berkeley) 3/30/95
- * $Id: nfs_bio.c,v 1.37 1997/05/13 19:41:32 dfr Exp $
+ * $Id: nfs_bio.c,v 1.38 1997/05/19 14:36:47 dfr Exp $
  */
 
 
@@ -109,8 +109,8 @@ nfs_getpages(ap)
 	auio.uio_iov = &aiov;
 	auio.uio_iovcnt = 1;
 	aiov.iov_base = 0;
-	aiov.iov_len = MAXBSIZE;
-	auio.uio_resid = MAXBSIZE;
+	aiov.iov_len = PAGE_SIZE;
+	auio.uio_resid = PAGE_SIZE;
 	auio.uio_offset = IDX_TO_OFF(m->pindex);
 	auio.uio_segflg = UIO_NOCOPY;
 	auio.uio_rw = UIO_READ;
@@ -120,7 +120,7 @@ nfs_getpages(ap)
 	m->flags |= PG_BUSY;
 	m->busy--;
 
-	if (error && (auio.uio_resid == MAXBSIZE))
+	if (error && (auio.uio_resid == PAGE_SIZE))
 		return VM_PAGER_ERROR;
 	return 0;
 }
diff --git a/sys/nfsclient/nfs_bio.c b/sys/nfsclient/nfs_bio.c
index 2a02371..a6320b4 100644
--- a/sys/nfsclient/nfs_bio.c
+++ b/sys/nfsclient/nfs_bio.c
@@ -34,7 +34,7 @@
  * SUCH DAMAGE.
  *
  *	@(#)nfs_bio.c	8.9 (Berkeley) 3/30/95
- * $Id: nfs_bio.c,v 1.37 1997/05/13 19:41:32 dfr Exp $
+ * $Id: nfs_bio.c,v 1.38 1997/05/19 14:36:47 dfr Exp $
  */
 
 
@@ -109,8 +109,8 @@ nfs_getpages(ap)
 	auio.uio_iov = &aiov;
 	auio.uio_iovcnt = 1;
 	aiov.iov_base = 0;
-	aiov.iov_len = MAXBSIZE;
-	auio.uio_resid = MAXBSIZE;
+	aiov.iov_len = PAGE_SIZE;
+	auio.uio_resid = PAGE_SIZE;
 	auio.uio_offset = IDX_TO_OFF(m->pindex);
 	auio.uio_segflg = UIO_NOCOPY;
 	auio.uio_rw = UIO_READ;
@@ -120,7 +120,7 @@ nfs_getpages(ap)
 	m->flags |= PG_BUSY;
 	m->busy--;
 
-	if (error && (auio.uio_resid == MAXBSIZE))
+	if (error && (auio.uio_resid == PAGE_SIZE))
 		return VM_PAGER_ERROR;
 	return 0;
 }
-- 
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