From owner-freebsd-bugs  Wed Jul 31 16:40: 9 2002
Delivered-To: freebsd-bugs@hub.freebsd.org
Received: from mx1.FreeBSD.org (mx1.FreeBSD.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id AA87037B405
	for <freebsd-bugs@hub.freebsd.org>; Wed, 31 Jul 2002 16:40:02 -0700 (PDT)
Received: from freefall.freebsd.org (freefall.FreeBSD.org [216.136.204.21])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 04E0A43E65
	for <freebsd-bugs@hub.freebsd.org>; Wed, 31 Jul 2002 16:40:02 -0700 (PDT)
	(envelope-from gnats@FreeBSD.org)
Received: from freefall.freebsd.org (gnats@localhost [127.0.0.1])
	by freefall.freebsd.org (8.12.4/8.12.4) with ESMTP id g6VNe1JU072130
	for <freebsd-bugs@freefall.freebsd.org>; Wed, 31 Jul 2002 16:40:01 -0700 (PDT)
	(envelope-from gnats@freefall.freebsd.org)
Received: (from gnats@localhost)
	by freefall.freebsd.org (8.12.4/8.12.4/Submit) id g6VNe1sO072128;
	Wed, 31 Jul 2002 16:40:01 -0700 (PDT)
Received: from mx1.FreeBSD.org (mx1.FreeBSD.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id C836437B400
	for <freebsd-gnats-submit@FreeBSD.org>; Wed, 31 Jul 2002 16:33:20 -0700 (PDT)
Received: from www.freebsd.org (www.FreeBSD.org [216.136.204.117])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 8EAFA43E3B
	for <freebsd-gnats-submit@FreeBSD.org>; Wed, 31 Jul 2002 16:33:20 -0700 (PDT)
	(envelope-from nobody@FreeBSD.org)
Received: from www.freebsd.org (localhost [127.0.0.1])
	by www.freebsd.org (8.12.4/8.12.4) with ESMTP id g6VNXKOT018089
	for <freebsd-gnats-submit@FreeBSD.org>; Wed, 31 Jul 2002 16:33:20 -0700 (PDT)
	(envelope-from nobody@www.freebsd.org)
Received: (from nobody@localhost)
	by www.freebsd.org (8.12.4/8.12.4/Submit) id g6VNXKXm018088;
	Wed, 31 Jul 2002 16:33:20 -0700 (PDT)
Message-Id: <200207312333.g6VNXKXm018088@www.freebsd.org>
Date: Wed, 31 Jul 2002 16:33:20 -0700 (PDT)
From: Yury Izrailevsky <izrailev@yahoo.com>
To: freebsd-gnats-submit@FreeBSD.org
X-Send-Pr-Version: www-1.0
Subject: kern/41216: Get "NFS append race" error
Sender: owner-freebsd-bugs@FreeBSD.ORG
Precedence: bulk
List-ID: <freebsd-bugs.FreeBSD.ORG>
List-Archive: <http://docs.freebsd.org/mail/> (Web Archive)
List-Help: <mailto:majordomo@FreeBSD.ORG?subject=help> (List Instructions)
List-Subscribe: <mailto:majordomo@FreeBSD.ORG?subject=subscribe%20freebsd-bugs>
List-Unsubscribe: <mailto:majordomo@FreeBSD.ORG?subject=unsubscribe%20freebsd-bugs>
X-Loop: FreeBSD.org


>Number:         41216
>Category:       kern
>Synopsis:       Get "NFS append race" error
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Jul 31 16:40:01 PDT 2002
>Closed-Date:
>Last-Modified:
>Originator:     Yury Izrailevsky
>Release:        FreeBSD 4.5 Stable
>Organization:
>Environment:
4.5-STABLE FreeBSD i386
>Description:
Console and /var/log/messages gets flooded with this message:

/kernel-4.5-generic: NFS append race @3e1c00:512
/kernel-4.5-generic: NFS append race @3e1c00:512
/kernel-4.5-generic: NFS append race @3e3a00:1024
/kernel-4.5-generic: NFS append race @3e3a00:1024
/kernel-4.5-generic: NFS append race @3e5800:1536
/kernel-4.5-generic: NFS append race @3e5800:1536

>How-To-Repeat:
      Multi-thread application that appends and reads from ultiple files.

This error apparently gets triggered in /usr/src/sys/nfs/nfs_bio.c, line 967. Comments in the source code indicate that the race condition "might occur XXX". Is there a fix to this?
>Fix:
      Looking for one.
>Release-Note:
>Audit-Trail:
>Unformatted:

To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-bugs" in the body of the message