freebsd-nq/sys/gnu/fs/ext2fs
Bruce Evans 1874ef935c Quick fix for breakage of read clustering on non-IDE drives. Read
clustering is obsolescent technology so hardly anyone noticed.  On
a DORS 32160 SCSI drive with 4 tags, read clustering makes very
little difference even for huge sequential reads.  However, on a
ZIP SCSI drive with 0 tags, the minimum overhead per block is about
40 msec, so very large clusters must be used to get anywhere near
the maximum transfer rate.  Using clusters consisting of 1 8K block
reduces the transfer rate to about 250K/sec.  Under msdosfs, missing
read clustering is normal and a cluster size of 1 512 byte block
reduces the transfer rate to about 25K/sec.

Broken in:	rev.1.18
1998-08-18 03:54:39 +00:00
..
COPYRIGHT.INFO
ext2_alloc.c Fixed printf format errors. 1998-07-30 17:12:39 +00:00
ext2_balloc.c
ext2_bmap.c Quick fix for breakage of read clustering on non-IDE drives. Read 1998-08-18 03:54:39 +00:00
ext2_extern.h
ext2_fs_sb.h
ext2_fs.h
ext2_inode_cnv.c
ext2_inode.c
ext2_linux_balloc.c
ext2_linux_ialloc.c
ext2_lookup.c
ext2_mount.h
ext2_readwrite.c
ext2_subr.c
ext2_vfsops.c
ext2_vnops.c "The releaseing of the reference and lock is not temporary and belongs 1998-08-12 21:42:54 +00:00
fs.h
i386-bitops.h
inode.h