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| author | gibbs <gibbs@FreeBSD.org> | 1994-11-17 01:30:53 +0000 |
|---|---|---|
| committer | gibbs <gibbs@FreeBSD.org> | 1994-11-17 01:30:53 +0000 |
| commit | 02b39f95c4927ea494cd1146c3e4bbda7435ee77 (patch) | |
| tree | c5bfd9e88f2f40c61118ea5d75550f34eaa93249 /sys/ufs/lfs/lfs.h | |
| parent | 8119b5015f901ca196c21cf712d8513ee0d4275b (diff) | |
| download | FreeBSD-src-02b39f95c4927ea494cd1146c3e4bbda7435ee77.zip FreeBSD-src-02b39f95c4927ea494cd1146c3e4bbda7435ee77.tar.gz | |
John Dyson's patches (and a few from me too) to LFS to use a different
buffering scheme and make it more in tune with FreeBSD's vfs_bio
implementation. The filesystem seems fairly stable, but I wouldn't recommend
it to anyone not willing to experience problems. This is very green code and
has the limitation that YOU CAN ONLY HAVE ONE LFS PARTITION MOUNTED AT A TIME.
What LFS is good for:
Non fsynced writes FASTER THAN FFS
Large deletions Increadibly fast
Reads are a little bit slower than FFS right now, but that is a factor of
how under optimized this code is. LFS should in theory perform at least as
well as FFS under fsync (iozone) type loads, and this is what I'm currently
working on.
Reviewed by: Justin Gibbs
Submitted by: John Dyson
Obtained from:
Diffstat (limited to 'sys/ufs/lfs/lfs.h')
| -rw-r--r-- | sys/ufs/lfs/lfs.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/sys/ufs/lfs/lfs.h b/sys/ufs/lfs/lfs.h index 9003ece..3a072a8 100644 --- a/sys/ufs/lfs/lfs.h +++ b/sys/ufs/lfs/lfs.h @@ -31,7 +31,7 @@ * SUCH DAMAGE. * * @(#)lfs.h 8.3 (Berkeley) 9/23/93 - * $Id: lfs.h,v 1.3 1994/08/21 07:16:08 paul Exp $ + * $Id: lfs.h,v 1.4 1994/10/10 01:04:47 phk Exp $ */ #ifndef _UFS_LFS_LFS_H_ @@ -110,6 +110,7 @@ struct lfs { daddr_t lfs_offset; /* offset in curseg for next partial */ daddr_t lfs_lastpseg; /* address of last partial written */ u_long lfs_tstamp; /* time stamp */ + long lfs_maxsymlinklen; /* max length of an internal symlink */ /* These are configuration parameters. */ u_long lfs_minfree; /* minimum percentage of free blocks */ @@ -157,6 +158,7 @@ struct lfs { u_char lfs_flags; /* currently unused flag */ u_char lfs_fsmnt[MNAMELEN]; /* name mounted on */ u_char pad[3]; /* long-align */ + u_char pad2[156]; /* Block align */ /* Checksum; valid on disk. */ u_long lfs_cksum; /* checksum for superblock checking */ |
