From owner-freebsd-questions@FreeBSD.ORG  Mon Nov 21 21:53:10 2005
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
X-Original-To: questions@freebsd.org
Delivered-To: freebsd-questions@FreeBSD.ORG
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 39B4F16A420
	for <questions@freebsd.org>; Mon, 21 Nov 2005 21:53:10 +0000 (GMT)
	(envelope-from mi+mx@aldan.algebra.com)
Received: from vms040pub.verizon.net (vms040pub.verizon.net [206.46.252.40])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 9FE8843D60
	for <questions@freebsd.org>; Mon, 21 Nov 2005 21:52:58 +0000 (GMT)
	(envelope-from mi+mx@aldan.algebra.com)
Received: from corbulon.video-collage.com ([151.204.231.237])
	by vms040.mailsrvcs.net
	(Sun Java System Messaging Server 6.2-4.02 (built Sep  9 2005))
	with ESMTPA id <0IQB00M96RBZDX1C@vms040.mailsrvcs.net> for
	questions@freebsd.org; Mon, 21 Nov 2005 15:50:24 -0600 (CST)
Received: from mteterin.us.murex.com
	(195-11.customer.cloud9.net [168.100.195.11])	by
	corbulon.video-collage.com
	(8.13.4/8.13.1) with ESMTP id jALLoH8a066290
	(version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO)
	for <questions@freebsd.org>; Mon, 21 Nov 2005 16:50:22 -0500
Received: from mteterin.us.murex.com (mteterin@localhost [127.0.0.1])
	by mteterin.us.murex.com (8.13.4/8.13.4) with ESMTP id
	jALLoAoO097812	for
	<questions@freebsd.org>; Mon, 21 Nov 2005 16:50:10 -0500
Received: from localhost (localhost [[UNIX: localhost]])
	by mteterin.us.murex.com (8.13.4/8.13.4/Submit)
	id jALLo8oU097811	for questions@freebsd.org;
	Mon, 21 Nov 2005 16:50:08 -0500
Date: Mon, 21 Nov 2005 16:50:08 -0500
From: Mikhail Teterin <mi+mx@aldan.algebra.com>
To: questions@freebsd.org
Message-id: <200511211650.08260.mi+mx@aldan.algebra.com>
Organization: Virtual Estates, Inc.
MIME-version: 1.0
Content-type: text/plain; charset=us-ascii
Content-transfer-encoding: 7bit
Content-disposition: inline
X-Virus-Scanned: ClamAV devel-20050525/1181/Mon Nov 21 06:10:32 2005 on
	corbulon.video-collage.com
X-Virus-Status: Clean
X-Scanned-By: MIMEDefang 2.43
X-Authentication-warning: mteterin.us.murex.com: mteterin set sender to
	mi+mx@aldan.algebra.com using -f
User-Agent: KMail/1.8.2
Cc: 
Subject: some files written via mmap end up corrupted
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: User questions <freebsd-questions.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
	<mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions>
List-Post: <mailto:freebsd-questions@freebsd.org>
List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
	<mailto:freebsd-questions-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Mon, 21 Nov 2005 21:53:10 -0000

I must not be using the API properly :-(

The writes to the mmap-ed area and then fsync-s the opened file, munmaps it, 
and exits.

Sometimes, the files end up corrupted at the end, however -- in about 10% of 
cases.

What am I doing wrong? Thanks!

	-mi