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Make MNT_ASYNC more effective for UFS. It should not be too much more

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dangerous than the original MNT_ASYNC.  There might be some minor
security considerations due to data writes not being posted as promptly
as before.  Meta-data operations are still not quite as fast as Linux,
but streaming I/O is still higher.
This commit is contained in:
John Dyson 1995-11-05 21:01:15 +00:00
parent aef922f514
commit 4dc4e0d228
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=12111
4 changed files with 14 additions and 7 deletions
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5
sys/kern/vfs_extattr.c
View file

@ -36,7 +36,7 @@
* SUCH DAMAGE.
*
* @(#)vfs_syscalls.c 8.13 (Berkeley) 4/15/94
* $Id: vfs_syscalls.c,v 1.35 1995/10/22 09:32:28 davidg Exp $
* $Id: vfs_syscalls.c,v 1.36 1995/11/04 10:35:26 bde Exp $
*/
#include <sys/param.h>
@ -1764,7 +1764,8 @@ fsync(p, uap, retval)
if (vp->v_object) {
vm_object_page_clean(vp->v_object, 0, 0 ,0, FALSE);
}
error = VOP_FSYNC(vp, fp->f_cred, MNT_WAIT, p);
error = VOP_FSYNC(vp, fp->f_cred,
(vp->v_mount->mnt_flag & MNT_ASYNC) ? MNT_NOWAIT : MNT_WAIT, p);
VOP_UNLOCK(vp);
return (error);
}

5
sys/kern/vfs_syscalls.c
View file

@ -36,7 +36,7 @@
* SUCH DAMAGE.
*
* @(#)vfs_syscalls.c 8.13 (Berkeley) 4/15/94
* $Id: vfs_syscalls.c,v 1.35 1995/10/22 09:32:28 davidg Exp $
* $Id: vfs_syscalls.c,v 1.36 1995/11/04 10:35:26 bde Exp $
*/
#include <sys/param.h>
@ -1764,7 +1764,8 @@ fsync(p, uap, retval)
if (vp->v_object) {
vm_object_page_clean(vp->v_object, 0, 0 ,0, FALSE);
}
error = VOP_FSYNC(vp, fp->f_cred, MNT_WAIT, p);
error = VOP_FSYNC(vp, fp->f_cred,
(vp->v_mount->mnt_flag & MNT_ASYNC) ? MNT_NOWAIT : MNT_WAIT, p);
VOP_UNLOCK(vp);
return (error);
}

6
sys/ufs/ffs/ffs_inode.c
View file

@ -31,7 +31,7 @@
* SUCH DAMAGE.
*
* @(#)ffs_inode.c 8.5 (Berkeley) 12/30/93
* $Id: ffs_inode.c,v 1.14 1995/08/04 05:49:17 davidg Exp $
* $Id: ffs_inode.c,v 1.15 1995/08/16 13:16:58 davidg Exp $
*/
#include <sys/param.h>
@ -222,6 +222,8 @@ ffs_truncate(ap)
oip->i_size = length;
if (aflags & B_SYNC)
bwrite(bp);
else if (ovp->v_mount->mnt_flag & MNT_ASYNC)
bdwrite(bp);
else
bawrite(bp);
vnode_pager_setsize(ovp, (u_long)length);
@ -252,6 +254,8 @@ ffs_truncate(ap)
allocbuf(bp, size);
if (aflags & B_SYNC)
bwrite(bp);
else if (ovp->v_mount->mnt_flag & MNT_ASYNC)
bdwrite(bp);
else
bawrite(bp);
}

5
sys/ufs/ufs/ufs_readwrite.c
View file

@ -31,7 +31,7 @@
* SUCH DAMAGE.
*
* @(#)ufs_readwrite.c 8.7 (Berkeley) 1/21/94
* $Id: ufs_readwrite.c,v 1.13 1995/09/11 15:56:46 bde Exp $
* $Id: ufs_readwrite.c,v 1.14 1995/10/23 02:23:18 dyson Exp $
*/
#ifdef LFS_READWRITE
@ -280,7 +280,8 @@ WRITE(ap)
if (ioflag & IO_SYNC) {
(void)bwrite(bp);
} else if (xfersize + blkoffset == fs->fs_bsize) {
} else if (xfersize + blkoffset == fs->fs_bsize &&
(vp->v_mount->mnt_flag & MNT_ASYNC) == 0) {
if (doclusterwrite) {
bp->b_flags |= B_CLUSTEROK;
cluster_write(bp, ip->i_size);