Remove the ffs_softupdates(4) man page. The license has been changed to BSD and

all relevant information has been moved to the options(4) page.

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-.\" $OpenBSD: ffs_softupdates.4,v 1.4 2000/04/30 18:41:30 millert Exp $
-.\"
-.\" Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
-.\" All rights reserved.
-.\"
-.\" Redistribution and use in source and binary forms, with or without
-.\" modification, are permitted provided that the following conditions
-.\" are met:
-.\" 1. Redistributions of source code must retain the above copyright
-.\"    notice, this list of conditions and the following disclaimer.
-.\" 2. Redistributions in binary form must reproduce the above copyright
-.\"    notice, this list of conditions and the following disclaimer in the
-.\"    documentation and/or other materials provided with the distribution.
-.\" 3. The name of the author may not be used to endorse or promote products
-.\"    derived from this software without specific prior written permission.
-.\"
-.\" THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
-.\" INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
-.\" AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
-.\" THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
-.\" EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
-.\" PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
-.\" OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
-.\" WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
-.\" OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
-.\" ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-.\"
-.Dd March 15, 1998
-.Dt FFS_SOFTUPDATES 4
-.Os
-.Sh NAME
-.Nm ffs_softupdates
-.Nd asynchronous file system writes
-.Sh DESCRIPTION
-The
-.Nm FFS_SOFTUPDATES
-kernel config option enables a scheme that uses partial ordering of
-buffer cache operations to allow metadata updates in the fast filesystem
-to happen asynchronously, increasing write performance significantly.
-Normally, the
-.Em ffs
-filesystem writes metadata updates synchronously which exacts
-a performance penalty in favor of filesystem integrity.
-With
-.Em soft updates ,
-you gain the performance of asynchronous writes while retaining the safety
-of synchronous metadata updates.
-.Pp
-.Em Soft Updates
-must be enabled on a per-filesystem basis.  To do this, boot into
-single user mode and run
-.Dq tunefs -s enable special
-on each character special disk device you want to enable
-.Em soft updates
-on, then run
-.Dq reboot -n .
-.Sh CAVEATS
-Soft updates should be considered experimental at this time.
-.Pp
-CPUs with a small kernel address space, such as the sun4 and
-sun4c, do not have enough kernel memory to support
-.Em Soft Updates .
-Attempts to use
-.Em Soft Updates
-on these CPUs will cause a kernel hang or panic after a short period of
-use as the kernel will quickly run out of memory.  This is not related
-to the amount of physical memory present in the machine--it is a limitation
-of the CPU architecture.
-.Pp
-There should be a
-.Xr mount 2
-option to enable
-.Em soft updates .
-.br
-The current license for
-.Nm
-is more restrictive than the rest of the
-.Ox
-kernel; this will be changed at a future date.
-.Sh AUTHOR
-Marshall Kirk McKusick
-.Sh LICENSE
-The following are the copyrights and redistribution conditions that
-apply to this copy of the soft update software. For a license
-to use, redistribute or sell the soft update software under
-conditions other than those described here, please contact the
-author at one of the following addresses:
-.Bd -literal -offset indent
-Marshall Kirk McKusick          mckusick@mckusick.com
-1614 Oxford Street              +1-510-843-9542
-Berkeley, CA 94709-1608
-USA
-.Ed
-.Pp
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions
-are met:
-.Bl -tag -width XXX
-.It 1.
-Redistributions of source code must retain the above copyright
-notice, this list of conditions and the following disclaimer.
-.It 2.
-Redistributions in binary form must reproduce the above copyright
-notice, this list of conditions and the following disclaimer in the
-documentation and/or other materials provided with the distribution.
-.It 3.
-None of the names of McKusick, Ganger, Patt, or the University of
-Michigan may be used to endorse or promote products derived from
-this software without specific prior written permission.
-.It 4.
-Redistributions in any form must be accompanied by information on
-how to obtain complete source code for any accompanying software
-that uses this software. This source code must either be included
-in the distribution or be available for no more than the cost of
-distribution plus a nominal fee, and must be freely redistributable
-under reasonable conditions. For an executable file, complete
-source code means the source code for all modules it contains.
-It does not mean source code for modules or files that typically
-accompany the operating system on which the executable file runs,
-e.g., standard library modules or system header files.
-.El
-.Pp
-THIS SOFTWARE IS PROVIDED BY MARSHALL KIRK MCKUSICK ``AS IS'' AND ANY
-EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-DISCLAIMED.  IN NO EVENT SHALL MARSHALL KIRK MCKUSICK BE LIABLE FOR
-ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-SUCH DAMAGE.
-.Sh SEE ALSO
-.Xr fs 5 ,
-.Xr config 8 ,
-.Xr sysctl 8 ,
-.Xr tunefs 8 .
-.Rs
-.%T "A Fast Filesystem for UNIX"
-.%A Marshall Kirk McKusick
-.%A William N. Joy
-.%A Samuel J. Leffler
-.%A Robert S. Fabry
-.%C Computer Science Research Group
-.Re
-.Pp
-.Rs
-.%T "Soft Updates: A Solution to the Metadata Update Problem in File Systems"
-.%A Gregory R. Ganger
-.%A Yale N. Patt
-.%R CSE-TR-254-95
-.%C "University of Michigan, Ann Arbor"
-.Re
-.br
-.Li http://www.ece.cmu.edu/~ganger/papers/CSE-TR-254-95/