diff options
| author | dyson <dyson@FreeBSD.org> | 1996-12-29 02:45:28 +0000 |
|---|---|---|
| committer | dyson <dyson@FreeBSD.org> | 1996-12-29 02:45:28 +0000 |
| commit | 04a0ee9a2a23ea1925b6625e3268da60ccc7944b (patch) | |
| tree | 0be85582a1c640271ed7ce19fc19c0c85527cb9c /sys/kern/vfs_subr.c | |
| parent | baa03b956c25159833733ce567a847c13e9bd032 (diff) | |
| download | FreeBSD-src-04a0ee9a2a23ea1925b6625e3268da60ccc7944b.zip FreeBSD-src-04a0ee9a2a23ea1925b6625e3268da60ccc7944b.tar.gz | |
This commit is the embodiment of some VFS read clustering improvements.
Firstly, now our read-ahead clustering is on a file descriptor basis and not
on a per-vnode basis. This will allow multiple processes reading the
same file to take advantage of read-ahead clustering. Secondly, there
previously was a problem with large reads still using the ramp-up
algorithm. Of course, that was bogus, and now we read the entire
"chunk" off of the disk in one operation. The read-ahead clustering
algorithm should use less CPU than the previous also (I hope :-)).
NOTE: THAT LKMS MUST BE REBUILT!!!
Diffstat (limited to 'sys/kern/vfs_subr.c')
| -rw-r--r-- | sys/kern/vfs_subr.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/sys/kern/vfs_subr.c b/sys/kern/vfs_subr.c index ae27ae2..b4e1db4 100644 --- a/sys/kern/vfs_subr.c +++ b/sys/kern/vfs_subr.c @@ -36,7 +36,7 @@ * SUCH DAMAGE. * * @(#)vfs_subr.c 8.13 (Berkeley) 4/18/94 - * $Id: vfs_subr.c,v 1.64 1996/10/28 11:34:57 phk Exp $ + * $Id: vfs_subr.c,v 1.65 1996/11/12 09:24:31 bde Exp $ */ /* @@ -393,8 +393,6 @@ retry: #endif vp->v_flag = 0; vp->v_lastr = 0; - vp->v_ralen = 0; - vp->v_maxra = 0; vp->v_lastw = 0; vp->v_lasta = 0; vp->v_cstart = 0; |
