From owner-cvs-src@FreeBSD.ORG  Mon Mar 15 11:08:56 2004
Return-Path: <owner-cvs-src@FreeBSD.ORG>
Delivered-To: cvs-src@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP
	id 3E6DA16A4CE; Mon, 15 Mar 2004 11:08:56 -0800 (PST)
Received: from smtp-out5.xs4all.nl (smtp-out5.xs4all.nl [194.109.24.6])
	by mx1.FreeBSD.org (Postfix) with ESMTP
	id 8207A43D31; Mon, 15 Mar 2004 11:08:55 -0800 (PST)
	(envelope-from wkb@freebie.xs4all.nl)
Received: from freebie.xs4all.nl (freebie.xs4all.nl [213.84.32.253])
	by smtp-out5.xs4all.nl (8.12.10/8.12.10) with ESMTP id i2FJ8r7U069076;
	Mon, 15 Mar 2004 20:08:54 +0100 (CET)
Received: from freebie.xs4all.nl (localhost [127.0.0.1])
	by freebie.xs4all.nl (8.12.10/8.12.9) with ESMTP id i2FJ8rTj033623;
	Mon, 15 Mar 2004 20:08:53 +0100 (CET)
	(envelope-from wkb@freebie.xs4all.nl)
Received: (from wkb@localhost)
	by freebie.xs4all.nl (8.12.10/8.12.9/Submit) id i2FJ8rou033622;
	Mon, 15 Mar 2004 20:08:53 +0100 (CET)
	(envelope-from wkb)
Date: Mon, 15 Mar 2004 20:08:53 +0100
From: Wilko Bulte <wkb@freebie.xs4all.nl>
To: John Baldwin <jhb@FreeBSD.ORG>
Message-ID: <20040315190853.GA33607@freebie.xs4all.nl>
References: <200403151848.i2FImSFe047106@repoman.freebsd.org>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <200403151848.i2FImSFe047106@repoman.freebsd.org>
User-Agent: Mutt/1.4.1i
X-OS: FreeBSD 4.9-STABLE
X-PGP: finger wilko@freebsd.org
cc: cvs-src@FreeBSD.ORG
cc: src-committers@FreeBSD.ORG
cc: cvs-all@FreeBSD.ORG
Subject: Re: cvs commit: src/sys/kern sys_process.c syscalls.master
X-BeenThere: cvs-src@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: CVS commit messages for the src tree <cvs-src.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/cvs-src>,
	<mailto:cvs-src-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/cvs-src>
List-Post: <mailto:cvs-src@freebsd.org>
List-Help: <mailto:cvs-src-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/cvs-src>,
	<mailto:cvs-src-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Mon, 15 Mar 2004 19:08:56 -0000

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.

-- 
Wilko Bulte				wilko@FreeBSD.org