From owner-freebsd-current@FreeBSD.ORG  Tue Oct 30 18:58:09 2007
Return-Path: <owner-freebsd-current@FreeBSD.ORG>
Delivered-To: freebsd-current@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id B306216A41A;
	Tue, 30 Oct 2007 18:58:09 +0000 (UTC)
	(envelope-from kris@FreeBSD.org)
Received: from weak.local (pointyhat.freebsd.org [IPv6:2001:4f8:fff6::2b])
	by mx1.freebsd.org (Postfix) with ESMTP id 156CA13C4A5;
	Tue, 30 Oct 2007 18:58:08 +0000 (UTC)
	(envelope-from kris@FreeBSD.org)
Message-ID: <47277EC4.4030003@FreeBSD.org>
Date: Tue, 30 Oct 2007 19:58:12 +0100
From: Kris Kennaway <kris@FreeBSD.org>
User-Agent: Thunderbird 2.0.0.6 (Macintosh/20070728)
MIME-Version: 1.0
To: "Ralf S. Engelschall" <rse@FreeBSD.org>
References: <20071029110204.GA64046@engelschall.com>
In-Reply-To: <20071029110204.GA64046@engelschall.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
Cc: freebsd-current@freebsd.org
Subject: Re: "sigreturn: eflags = 0x80283" after medium-to-high load
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Discussions about the use of FreeBSD-current
	<freebsd-current.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>, 
	<mailto:freebsd-current-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-current>
List-Post: <mailto:freebsd-current@freebsd.org>
List-Help: <mailto:freebsd-current-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
	<mailto:freebsd-current-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 30 Oct 2007 18:58:09 -0000

Ralf S. Engelschall wrote:
> Just FYI: When I compile lots of C++ code under 8.0 or 7.0 (both as of
> 2007-10-27 and running on ZFS inside a virtual machine) I'm still able
> to regularily bring the system into an unusable state. The effect is
> that first on the console the following kernel messages occur:
> 
>     sigreturn: eflags = 0x80283
>     sigreturn: eflags = 0x80297
> 
> Then after I type e.g. CTRL-C in my C++ compile session over SSH more
> such "sigreturn: eflags = 0x80283" occur on the console (and without
> bringing back a shell prompt on the SSH session). At this stage I also
> no longer can login via SSH through a new second SSH connection. Only on
> the console I still can perform a "sync; sync; sync; reboot" to rescue.
> In this situation even a regular "shutdown -r now" often just causes
> more "sigreturn: eflags = 0x80297" outputs but isn't really able to
> finally reboot the system.

Sounds like you need to do some debugging with DDB to identify the 
system state when it hangs.

Kris