[src/trunk]: src/sys/ufs/ufs if mounted ASYNC, use delayed writes for metadat...

[jdolecek <jdolecek%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/3170d99e4a29
branches:  trunk
changeset: 552168:3170d99e4a29
user:      jdolecek <jdolecek%NetBSD.org@localhost>
date:      Sat Sep 20 21:05:53 2003 +0000

description:
if mounted ASYNC, use delayed writes for metadata, which improves performance
of these operations significantly
based on FreeBSD ufs_lookup.c rev. 1.8, by John Dyson

diffstat:

 sys/ufs/ufs/ufs_lookup.c |  30 +++++++++++++++++++++++-------
 1 files changed, 23 insertions(+), 7 deletions(-)

diffs (79 lines):

diff -r 2473bf00c953 -r 3170d99e4a29 sys/ufs/ufs/ufs_lookup.c
--- a/sys/ufs/ufs/ufs_lookup.c  Sat Sep 20 20:55:34 2003 +0000
+++ b/sys/ufs/ufs/ufs_lookup.c  Sat Sep 20 21:05:53 2003 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: ufs_lookup.c,v 1.52 2003/09/15 15:08:09 yamt Exp $     */
+/*     $NetBSD: ufs_lookup.c,v 1.53 2003/09/20 21:05:53 jdolecek Exp $ */
 
 /*
  * Copyright (c) 1989, 1993
@@ -37,7 +37,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: ufs_lookup.c,v 1.52 2003/09/15 15:08:09 yamt Exp $");
+__KERNEL_RCSID(0, "$NetBSD: ufs_lookup.c,v 1.53 2003/09/20 21:05:53 jdolecek Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -761,7 +761,7 @@
                if (dp->i_offset & (dirblksiz - 1))
                        panic("ufs_direnter: newblk");
                flags = B_CLRBUF;
-               if (!DOINGSOFTDEP(dvp))
+               if (!DOINGSOFTDEP(dvp) && !(dvp->v_mount->mnt_flag &MNT_ASYNC))
                        flags |= B_SYNC;
                if ((error = VOP_BALLOC(dvp, (off_t)dp->i_offset, dirblksiz,
                    cr, flags, &bp)) != 0) {
@@ -829,7 +829,11 @@
                                vn_lock(tvp, LK_EXCLUSIVE | LK_RETRY);
                        return (error);
                } else {
-                       error = VOP_BWRITE(bp);
+                       if (dvp->v_mount->mnt_flag & MNT_ASYNC) {
+                               bdwrite(bp);
+                               error = 0;
+                       } else
+                               error = VOP_BWRITE(bp);
                }
                TIMEVAL_TO_TIMESPEC(&time, &ts);
                ret = VOP_UPDATE(dvp, &ts, &ts, UPDATE_DIROP);
@@ -932,7 +936,11 @@
                        ufs_rw32(dirp->d_ino, needswap), newdirbp, 0);
                bdwrite(bp);
        } else {
-               error = VOP_BWRITE(bp);
+               if (dvp->v_mount->mnt_flag & MNT_ASYNC) {
+                       bdwrite(bp);
+                       error = 0;
+               } else
+                       error = VOP_BWRITE(bp);
        }
        dp->i_flag |= IN_CHANGE | IN_UPDATE;
        /*
@@ -1026,7 +1034,11 @@
                        DIP_ASSIGN(ip, nlink, ip->i_nlink);
                        ip->i_flag |= IN_CHANGE;
                }
-               error = VOP_BWRITE(bp);
+               if (dvp->v_mount->mnt_flag & MNT_ASYNC) {
+                       bdwrite(bp);
+                       error = 0;
+               } else
+                       error = VOP_BWRITE(bp);
        }
        dp->i_flag |= IN_CHANGE | IN_UPDATE;
        return (error);
@@ -1065,7 +1077,11 @@
                oip->i_nlink--;
                DIP_ASSIGN(oip, nlink, oip->i_nlink);
                oip->i_flag |= IN_CHANGE;
-               error = VOP_BWRITE(bp);
+               if (vdp->v_mount->mnt_flag & MNT_ASYNC) {
+                       bdwrite(bp);
+                       error = 0;
+               } else
+                       error = VOP_BWRITE(bp);
        }
        dp->i_flag |= iflags;
        return (error);