From owner-freebsd-threads@FreeBSD.ORG  Thu Apr  3 12:35:57 2003
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 98A9037B405
	for <freebsd-threads@FreeBSD.ORG>;
	Thu,  3 Apr 2003 12:35:57 -0800 (PST)
Received: from speicher.org (sirius.speicher.org [209.74.10.51])
	by mx1.FreeBSD.org (Postfix) with ESMTP id DFF8A43F93
	for <freebsd-threads@FreeBSD.ORG>;
	Thu,  3 Apr 2003 12:35:55 -0800 (PST)
	(envelope-from geoff@speicher.org)
Received: from localhost (geoff@localhost)
	by speicher.org (8.11.6/8.11.6) with ESMTP id h33Klkq02986
	for <freebsd-threads@FreeBSD.ORG>;
	Thu, 3 Apr 2003 15:47:46 -0500 (EST)
	(envelope-from geoff@speicher.org)
Date: Thu, 3 Apr 2003 15:47:46 -0500 (EST)
From: "Geoffrey C. Speicher" <geoff@speicher.org>
To: freebsd-threads@FreeBSD.ORG
Message-ID: <Pine.BSF.4.05.10304031503370.2892-100000@speicher.org>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
Subject: 1:N threading
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: Thu, 03 Apr 2003 20:35:57 -0000

OK, so we've got 1:N threading (libc_r), 1:1 threading (thr), and M:N
threading (KSE).  Each model has its own merit depending on the
application.

However, it would still be nice if the 1:N model didn't block the whole
process when a thread blocks.  Is there any reason to hold onto a pure
userland implementation of 1:N?  Can libc_r be implemented in terms of
KSE?

Geoff