From owner-freebsd-threads@FreeBSD.ORG  Wed Jun 11 09:08:18 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 B948F37B401; Wed, 11 Jun 2003 09:08:18 -0700 (PDT)
Received: from mail.pcnet.com (mail.pcnet.com [204.213.232.4])
	by mx1.FreeBSD.org (Postfix) with ESMTP
	id 1341643FBF; Wed, 11 Jun 2003 09:08:18 -0700 (PDT)
	(envelope-from eischen@pcnet.com)
Received: from mail.pcnet.com (mail.pcnet.com [204.213.232.4])
	by mail.pcnet.com (8.12.8/8.12.1) with ESMTP id h5BG8HNc013904;
	Wed, 11 Jun 2003 12:08:17 -0400 (EDT)
Date: Wed, 11 Jun 2003 12:08:17 -0400 (EDT)
From: Daniel Eischen <eischen@pcnet.com>
To: Alexander Nedotsukov <bland@mail.ru>
In-Reply-To: <3EE74525.7020809@mail.ru>
Message-ID: <Pine.GSO.4.10.10306111207070.13761-100000@pcnet5.pcnet.com>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
cc: threads@freebsd.org
cc: "Matthew N. Dodd" <mdodd@freebsd.org>
Subject: Re: nvidia OpenGL and lib{thr,kse} related crash
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: Wed, 11 Jun 2003 16:08:19 -0000

On Thu, 12 Jun 2003, Alexander Nedotsukov wrote:

> Daniel Eischen wrote:
> 
> >On Wed, 11 Jun 2003, Alexander Nedotsukov wrote:
> >
> >  
> >
> >>Matthew N. Dodd wrote:
> >>
> >>    
> >>
> >>>Check http://www.minion.de/nvidia.html.
> >>>
> >>>      
> >>>
> >>Looks like this patches mostly present in ports tree. For my 
> >>undestanding the missed two should prevent memory access after free() 
> >>inside kernel and memory allocation for DMA push buffers. Anyway I'll 
> >>check it later evening when can get closer to my pc.
> >>    
> >>
> >
> >If your OpenGL applications or the libraries that they depend
> >on are using any of the COMPAT4X signal syscalls, then they
> >
> The kernel driver compilled by me on -cuurent. The OpenGL library by 
> nvidia on 4.x for sure.
> Can you say is this http://www.minion.de/files/machdep.c.diff supposed 
> to save %gs?
> 
> >won't work with libthr or libkse.  The COMPAT4X stuff in the
> >kernel destroys %gs which libthr and libkse both rely on
> >for their own use.  Are you sure that all your applications
> >and libraries are rebuilt under -current?  You can try
> >rebuilding your kernel without COMPAT4X and see if any
> >
> Well just give me a hint which one should be removed:
> 
> options         COMPAT_43               #Compatible with BSD 4.3 [KEEP 
> THIS!]
> options         COMPAT_FREEBSD4         #Compatible with FreeBSD4

Actually, it looks as if COMPAT_FREEBSD4 is OK and COMPAT_43
is not (sendsig() will destroy %gs).  You can try removing
both though and see what happens.

-- 
Dan Eischen