From owner-cvs-all@FreeBSD.ORG  Mon Mar 15 11:21:42 2004
Return-Path: <owner-cvs-all@FreeBSD.ORG>
Delivered-To: cvs-all@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP
	id 27BDB16A4CE; Mon, 15 Mar 2004 11:21:42 -0800 (PST)
Received: from electra.cse.Buffalo.EDU (electra.cse.Buffalo.EDU
	[128.205.32.2])	by mx1.FreeBSD.org (Postfix) with ESMTP
	id BCAB643D45; Mon, 15 Mar 2004 11:21:41 -0800 (PST)
	(envelope-from kensmith@cse.Buffalo.EDU)
Received: from electra.cse.Buffalo.EDU (kensmith@localhost [127.0.0.1])
	i2FJLd2Z029569;	Mon, 15 Mar 2004 14:21:39 -0500 (EST)
Received: (from kensmith@localhost)
	by electra.cse.Buffalo.EDU (8.12.10/8.12.9/Submit) id i2FJLdo3029568;
	Mon, 15 Mar 2004 14:21:39 -0500 (EST)
Date: Mon, 15 Mar 2004 14:21:39 -0500
From: Ken Smith <kensmith@cse.Buffalo.EDU>
To: Wilko Bulte <wkb@freebie.xs4all.nl>
Message-ID: <20040315192139.GB28070@electra.cse.Buffalo.EDU>
References: <200403151848.i2FImSFe047106@repoman.freebsd.org>
	<20040315190853.GA33607@freebie.xs4all.nl>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20040315190853.GA33607@freebie.xs4all.nl>
User-Agent: Mutt/1.4.1i
cc: cvs-src@FreeBSD.org
cc: src-committers@FreeBSD.org
cc: cvs-all@FreeBSD.org
cc: John Baldwin <jhb@FreeBSD.org>
Subject: Re: cvs commit: src/sys/kern sys_process.c syscalls.master
X-BeenThere: cvs-all@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: CVS commit messages for the entire tree <cvs-all.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/cvs-all>,
	<mailto:cvs-all-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/cvs-all>
List-Post: <mailto:cvs-all@freebsd.org>
List-Help: <mailto:cvs-all-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/cvs-all>,
	<mailto:cvs-all-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Mon, 15 Mar 2004 19:21:42 -0000

On Mon, Mar 15, 2004 at 08:08:53PM +0100, Wilko Bulte wrote:
> On Mon, Mar 15, 2004 at 10:48:28AM -0800, John Baldwin wrote:
> > jhb         2004/03/15 10:48:28 PST
> > 
> >   FreeBSD src repository
> > 
> >   Modified files:
> >     sys/kern             sys_process.c syscalls.master 
> >   Log:
> >   Drop the proc lock around calls to the MD functions ptrace_single_step(),
> >   ptrace_set_pc(), and cpu_ptrace() so that those functions are free to
> >   acquire Giant, sleep, etc.  We already do a PHOLD/PRELE around them so
> >   that it is safe to sleep inside of these routines if necessary.  This
> >   allows ptrace() to be marked MP safe again as it no longer triggers lock
> >   order reversals on Alpha.
> 
> Someone with a SMP alpha box might also want to give this a spin I suppose.
> 

beast (alpha ref machine in the cluster) has dual processors, if something
special needs to be done to test this we could arrange something.

-- 
						Ken Smith
- From there to here, from here to      |       kensmith@cse.buffalo.edu
  there, funny things are everywhere.   |
                      - Theodore Geisel |