From owner-freebsd-fs@FreeBSD.ORG  Sun Jul 13 06:52:55 2003
Return-Path: <owner-freebsd-fs@FreeBSD.ORG>
Delivered-To: freebsd-fs@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id BFE1837B401
	for <freebsd-fs@FreeBSD.ORG>; Sun, 13 Jul 2003 06:52:55 -0700 (PDT)
Received: from fledge.watson.org (fledge.watson.org [204.156.12.50])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 10A2B43F93
	for <freebsd-fs@FreeBSD.ORG>; Sun, 13 Jul 2003 06:52:55 -0700 (PDT)
	(envelope-from robert@fledge.watson.org)
Received: from fledge.watson.org (localhost [127.0.0.1])
	by fledge.watson.org (8.12.9/8.12.9) with ESMTP id h6DDqjai027834;
	Sun, 13 Jul 2003 09:52:45 -0400 (EDT)
	(envelope-from robert@fledge.watson.org)
Received: from localhost (robert@localhost)h6DDqZvV027829;
	Sun, 13 Jul 2003 09:52:45 -0400 (EDT)
	(envelope-from robert@fledge.watson.org)
Date: Sun, 13 Jul 2003 09:52:35 -0400 (EDT)
From: Robert Watson <rwatson@FreeBSD.ORG>
X-Sender: robert@fledge.watson.org
To: Oliver Fromme <olli@secnetix.de>
In-Reply-To: <200307090913.h699DnK3053575@lurza.secnetix.de>
Message-ID: <Pine.NEB.3.96L.1030713095011.27513F-100000@fledge.watson.org>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
cc: freebsd-fs@FreeBSD.ORG
Subject: Re: NFS problem FreeBSD vs NetApp Filer using tomcat / java
X-BeenThere: freebsd-fs@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: Filesystems <freebsd-fs.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-fs>,
	<mailto:freebsd-fs-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-fs>
List-Post: <mailto:freebsd-fs@freebsd.org>
List-Help: <mailto:freebsd-fs-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-fs>,
	<mailto:freebsd-fs-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sun, 13 Jul 2003 13:52:56 -0000


On Wed, 9 Jul 2003, Oliver Fromme wrote:

> Someone asked me off-list whether I use the "interruptible"  flag for
> the NFS mounts, and suggested switching it off. 
> 
> Well, I always set the interruptible flag, so that processes don't hang
> in case of NFS problems (so I can kill or Ctrl-C them).  Otherwise they
> will hang forever until I reboot. 
>    
> It is my understanding that the interruptible flag has only an effect
> when a signal is delivered to a process which is blocked on NFS I/O.  Or
> am I wrong? 

My recollection is that the linux threading mechanism uses signals between
threads as part of its synchronization primitives, etc.  It could be that
we're seeing a nasty interaction between NFS being unable to distinguish
between "user" signals (Ctrl-C from a tty) and "system" signals from the
thread library interrupting an NFS operation generated by the pager on a
program image file, resulting in a segfault.

So it would be interesting to know if turning off that flag makes the
program run properly.

Robert N M Watson             FreeBSD Core Team, TrustedBSD Projects
robert@fledge.watson.org      Network Associates Laboratories