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Date: Fri, 14 Jul 2000 01:07:12 -0700 (PDT)
From: Mark Diekhans <markd@Kermodei.com>
Reply-To: markd@Kermodei.com
To: FreeBSD-gnats-submit@freebsd.org
Subject: update(4) outdated
X-Send-Pr-Version: 3.2

>Number:         19912
>Category:       docs
>Synopsis:       update(4) man page obsolete
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    sheldonh
>State:          closed
>Quarter:        
>Keywords:       
>Date-Required:  
>Class:          doc-bug
>Submitter-Id:   current-users
>Arrival-Date:   Fri Jul 14 01:10:00 PDT 2000
>Closed-Date:    Thu Jul 20 00:37:58 PDT 2000
>Last-Modified:  Thu Jul 20 00:39:43 PDT 2000
>Originator:     Mark Diekhans
>Release:        FreeBSD 4.0-RELEASE i386
>Organization:
kermodei
>Environment:

>Description:
        The update(4) manual page is outdated and appears to be obsolete.
        It should probably be replaced with a syncer man page.
   
>How-To-Repeat:
>Fix:


>Release-Note:
>Audit-Trail:
Responsible-Changed-From-To: freebsd-doc->sheldonh 
Responsible-Changed-By: sheldonh 
Responsible-Changed-When: Fri Jul 14 05:27:16 PDT 2000 
Responsible-Changed-Why:  
Even if no syncer manual page is forthcoming, this cruft needs 
to go.  I'll make sure cross-references go away as well. 

http://www.freebsd.org/cgi/query-pr.cgi?pr=19912 

From: Sheldon Hearn <sheldonh@uunet.co.za>
To: freebsd-gnats-submit@FreeBSD.org
Cc:  
Subject: docs/19912: proposed syncer(4) manual page
Date: Fri, 14 Jul 2000 15:30:39 +0200

 This is the proposed syncer(4) manual page that has been submitted to
 <freebsd-hackers@FreeBSD.org>.
 
 Ciao,
 Sheldon.
 
 ------- Forwarded Message
 
 From: Sheldon Hearn <sheldonh@uunet.co.za>
 To: hackers@FreeBSD.org
 Subject: Re: Where is the syncer kernel process implemented? 
 In-reply-to: Your message of "Fri, 14 Jul 2000 14:32:11 +0200."
              <66316.963577931@axl.ops.uunet.co.za> 
 Date: Fri, 14 Jul 2000 15:29:35 +0200
 Message-ID: <67168.963581375@axl.ops.uunet.co.za>
 Sender: sheldonh@axl.ops.uunet.co.za
 
 
 
 On Fri, 14 Jul 2000 14:32:11 +0200, Sheldon Hearn wrote:
 
 > I need to replace the update(4) manual page with a syncer(4) manual
 > page.  Can someone please point me at the code that implements this
 > process?
 
 Alfred Perlstein pointed me at the correct code.  I used the update(4)
 manual page as a starting point and came up with this after a fairly
 lazy glance at the code.
 
 Does it look alright?
 
 Ciao,
 Sheldon.
 
 .\" Copyright (c) 2000 Sheldon Hearn <sheldonh@FreeBSD.org>
 .\" 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.
 .\"
 .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
 .\"
 .\" $FreeBSD$
 .\"
 .Dd July 14, 2000
 .Dt SYNCER 4
 .Os
 .Sh NAME
 .Nm syncer
 .Nd filesystem synchronizer kernel process
 .Sh SYNOPSIS
 .Nm syncer
 .Sh DESCRIPTION
 The
 .Nm
 kernel process helps protect the integrity of disk volumes
 by flushing volatile cached filesystem data to disk.
 This is done at thirty second
 .Pq actually Dv SYNCER_MAXDELAY - 2
 intervals by default.
 .Pp
 The kernel places all
 .Xr vnode 9 Ns 's
 in a number of queues equal to
 .Dv SYNCER_MAXDELAY .
 The
 .Nm
 process works through the queues
 in a round-robin fashion,
 usually processing one queue per second.
 For each
 .Xr vnode 9
 on the queue,
 the 
 .Nm
 process forces a write out to disk of its dirty buffers.
 .Sh SEE ALSO
 .Xr sync 2 ,
 .Xr fsck 8 ,
 .Xr sync 8
 .Sh BUGS
 It is possible on some systems that a
 .Xr sync 2
 occurring simultaneously with a crash may cause
 file system damage.  See
 .Xr fsck 8 .
 .Sh HISTORY
 The
 .Nm
 process is a descendant of the
 update
 command, which apeared in
 .At v6 ,
 and was usually started by
 .Pa /etc/rc
 when the system went multi-user.
 A kernel initiated
 update
 process first appeared in
 .Fx 2.0 .
 
 ------- End of Forwarded Message
 
 
State-Changed-From-To: open->closed 
State-Changed-By: sheldonh 
State-Changed-When: Thu Jul 20 00:37:58 PDT 2000 
State-Changed-Why:  
A variant of the page proposed in the audit trail has been committed 
to HEAD and merged onto the RELENG_4 branch.  The update(4) page 
has been removed and all stale cross-references have been updated 
for syncer(4). 

http://www.freebsd.org/cgi/query-pr.cgi?pr=19912 
>Unformatted:
