From owner-freebsd-threads@FreeBSD.ORG  Tue Jan  6 10:18:14 2004
Return-Path: <owner-freebsd-threads@FreeBSD.ORG>
Delivered-To: freebsd-threads@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 0258716A4D0
	for <freebsd-threads@freebsd.org>;
	Tue,  6 Jan 2004 10:18:14 -0800 (PST)
Received: from msgbas2x.cos.agilent.com (msgbas2x.cos.agilent.com
	[192.25.240.37])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 877EB43D48
	for <freebsd-threads@freebsd.org>;
	Tue,  6 Jan 2004 10:18:10 -0800 (PST)
	(envelope-from earl_chew@agilent.com)
Received: from relcos1.cos.agilent.com (relcos1.cos.agilent.com
	[130.29.152.239])	by msgbas2x.cos.agilent.com (Postfix) with ESMTP
	id DF5FB6CC2; Tue,  6 Jan 2004 11:18:09 -0700 (MST)
Received: from websvr.canada.agilent.com (websvr.canada.agilent.com
	[141.184.122.102])	by relcos1.cos.agilent.com (Postfix) with ESMTP
	id DDA7A102; Tue,  6 Jan 2004 11:18:08 -0700 (MST)
Received: from agilent.com (dhcp6burnaby.canada.agilent.com [141.184.123.147])
	SMKit7.1.1_Agilent) with ESMTP id i06IHdo27989;
	Tue, 6 Jan 2004 10:17:39 -0800 (PST)
Message-ID: <3FFAFBD7.2030601@agilent.com>
Date: Tue, 06 Jan 2004 10:17:59 -0800
From: Earl Chew <earl_chew@agilent.com>
Organization: Agilent Technologies
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US;
	rv:1.4) Gecko/20030624 Netscape/7.1 (ax)
X-Accept-Language: en-us, en
MIME-Version: 1.0
To: Daniel Eischen <eischen@vigrid.com>
References: <Pine.GSO.4.10.10401052008540.1088-100000@pcnet5.pcnet.com>
In-Reply-To: <Pine.GSO.4.10.10401052008540.1088-100000@pcnet5.pcnet.com>
Content-Type: text/plain; charset=us-ascii; format=flowed
Content-Transfer-Encoding: 7bit
cc: freebsd-threads@freebsd.org
Subject: Re: misc/24641: pthread_rwlock_rdlock can deadlock
X-BeenThere: freebsd-threads@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: Threading on FreeBSD <freebsd-threads.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-threads>,
	<mailto:freebsd-threads-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-threads>
List-Post: <mailto:freebsd-threads@freebsd.org>
List-Help: <mailto:freebsd-threads-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-threads>,
	<mailto:freebsd-threads-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 06 Jan 2004 18:18:14 -0000

Daniel Eischen wrote:
> Our current implementation is rather simple, but it does
> avoid us from having to build in limits as to how many
> rwlocks can be owned by a thread or how many threads can
> own a rwlock.  I'll add this to my TODO list for libkse
> but it will come at a bit of a performance & storage
> cost and there will have to be some built-in limits.

Thanks for the detailed explanation.

Earl