From owner-freebsd-arch@FreeBSD.ORG  Wed Jan 12 00:27:07 2005
Return-Path: <owner-freebsd-arch@FreeBSD.ORG>
Delivered-To: freebsd-arch@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id C4DE216A4F7
	for <arch@freebsd.org>; Wed, 12 Jan 2005 00:27:07 +0000 (GMT)
Received: from wproxy.gmail.com (wproxy.gmail.com [64.233.184.196])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 556B443D46
	for <arch@freebsd.org>; Wed, 12 Jan 2005 00:27:07 +0000 (GMT)
	(envelope-from peadar.edwards@gmail.com)
Received: by wproxy.gmail.com with SMTP id 58so406513wri
        for <arch@freebsd.org>; Tue, 11 Jan 2005 16:27:06 -0800 (PST)
DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws;
	s=beta; d=gmail.com;
	h=received:message-id:date:from:reply-to:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:references;
	b=dtraIyUrb2zCk05wSBD+hSlUAtkFHvuhERfoLgl8T4XKMA4yotHzI3kVKDRYftHhqFE8QoQV4JCAOJKORm29Cqtt2X898ui9gz2JnlVQEUBsXF6zjwlZW4kluNBJW6555sDVs48ZQriPbSZCPbgRp0RM6homTW6SjM8MsZbFrkk=
Received: by 10.54.39.76 with SMTP id m76mr208532wrm;
        Tue, 11 Jan 2005 16:27:06 -0800 (PST)
Received: by 10.54.57.76 with HTTP; Tue, 11 Jan 2005 16:27:06 -0800 (PST)
Message-ID: <34cb7c840501111627d3a1bf3@mail.gmail.com>
Date: Wed, 12 Jan 2005 00:27:06 +0000
From: Peter Edwards <peadar.edwards@gmail.com>
To: Poul-Henning Kamp <phk@phk.freebsd.dk>
In-Reply-To: <25164.1105484915@critter.freebsd.dk>
Mime-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
References: <34cb7c84050111145415980aa2@mail.gmail.com>
	 <25164.1105484915@critter.freebsd.dk>
cc: arch@freebsd.org
cc: ups@tree.com
Subject: Re: Slight change of vnode<-->vm object relationship.
X-BeenThere: freebsd-arch@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
Reply-To: Peter Edwards <peadar.edwards@gmail.com>
List-Id: Discussion related to FreeBSD architecture
	<freebsd-arch.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-arch>,
	<mailto:freebsd-arch-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-arch>
List-Post: <mailto:freebsd-arch@freebsd.org>
List-Help: <mailto:freebsd-arch-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-arch>,
	<mailto:freebsd-arch-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 12 Jan 2005 00:27:08 -0000

On Wed, 12 Jan 2005 00:08:35 +0100, Poul-Henning Kamp
<phk@phk.freebsd.dk> wrote:
> In message <34cb7c84050111145415980aa2@mail.gmail.com>, Peter Edwards writes:
> 
> >How about mmap() mappings after the close()? These can persist post
> >VOP_CLOSE, can't they?
> 
> I belive they hold a reference to the vnode so that it is in fact
> not really closed after all, it just looks that way from userland.
> 
As Stephan pointed out, that's looked after by VOP_INACTIVE, which
doesn't pair quite as smoothly with VOP_OPEN.

Also, the VOP_OPEN/VOP_CLOSE doesn't seem to bracket for exec() either
(there's a call to VOP_OPEN, but I can't find the matching VOP_CLOSE.
That could be just a bug, or myopia on my part)