From owner-freebsd-arch@FreeBSD.ORG  Fri Mar 26 06:13:22 2004
Return-Path: <owner-freebsd-arch@FreeBSD.ORG>
Delivered-To: freebsd-arch@freebsd.org
Received: from green.homeunix.org (freefall.freebsd.org [216.136.204.21])
	by hub.freebsd.org (Postfix) with ESMTP
	id 1672316A4CE; Fri, 26 Mar 2004 06:13:22 -0800 (PST)
Received: from green.homeunix.org (green@localhost [127.0.0.1])
	by green.homeunix.org (8.12.11/8.12.11) with ESMTP id i2QEDKTu001784;
	Fri, 26 Mar 2004 09:13:20 -0500 (EST)
	(envelope-from green@green.homeunix.org)
Received: from localhost (green@localhost)i2QEDKHw001781;
	Fri, 26 Mar 2004 09:13:20 -0500 (EST)
	(envelope-from green@green.homeunix.org)
Message-Id: <200403261413.i2QEDKHw001781@green.homeunix.org>
X-Mailer: exmh version 2.6.3 04/04/2003 with nmh-1.0.4
To: des@des.no (Dag-Erling =?iso-8859-1?q?Sm=F8rgrav?=)
In-Reply-To: Message from des@des.no (Dag-Erling =?iso-8859-1?q?Sm=F8rgrav?=) 
   of "Fri, 26 Mar 2004 09:47:40 +0100." <xzpekrgf103.fsf@dwp.des.no> 
From: "Brian F. Feldman" <green@FreeBSD.org>
Mime-Version: 1.0
Content-Type: text/plain; charset=iso-8859-1
Content-Transfer-Encoding: quoted-printable
Date: Fri, 26 Mar 2004 09:13:20 -0500
Sender: green@green.homeunix.org
cc: arch@FreeBSD.org
cc: David Schultz <das@FreeBSD.org>
cc: Seigo Tanimura <tanimura@tanimura.dyndns.org>
cc: John Baldwin <jhb@FreeBSD.org>
Subject: Re: Is MTX_CONTESTED evil? 
X-BeenThere: freebsd-arch@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
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: Fri, 26 Mar 2004 14:13:22 -0000

des@des.no (Dag-Erling =3D?iso-8859-1?q?Sm=3DF8rgrav?=3D) wrote:
> "Brian F. Feldman" <green@FreeBSD.org> writes:
> > Well, that certainly explains the blitz of crashes I had to fix
> > recently!  Since INVARIANTS and WITNESS are on by default, it would
> > make sense to make ADAPTIVE_MUTEX default to catch more bugs.
> =

> Making ADAPTIVE_MUTEXES default will not catch more bugs, it will just
> piss off users.

What in the world you are talking about?  I didn't know that a large clas=
s =

of bugs existed on SMP, turned on ADAPTIVE_MUTEXES, and found those bugs.=

QED.

-- =

Brian Fundakowski Feldman                           \'[ FreeBSD ]''''''''=
''\
  <> green@FreeBSD.org                               \  The Power to Serv=
e! \
 Opinions expressed are my own.                       \,,,,,,,,,,,,,,,,,,=
,,,,\