From owner-freebsd-xen@FreeBSD.ORG  Thu Dec 29 22:52:31 2011
Return-Path: <owner-freebsd-xen@FreeBSD.ORG>
Delivered-To: xen@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id D47AE106566B
	for <xen@freebsd.org>; Thu, 29 Dec 2011 22:52:31 +0000 (UTC)
	(envelope-from alc@rice.edu)
Received: from mh8.mail.rice.edu (mh8.mail.rice.edu [128.42.201.24])
	by mx1.freebsd.org (Postfix) with ESMTP id A1E5E8FC16
	for <xen@freebsd.org>; Thu, 29 Dec 2011 22:52:31 +0000 (UTC)
Received: from mh8.mail.rice.edu (localhost.localdomain [127.0.0.1])
	by mh8.mail.rice.edu (Postfix) with ESMTP id C6A56291CAB;
	Thu, 29 Dec 2011 16:52:30 -0600 (CST)
Received: from mh8.mail.rice.edu (localhost.localdomain [127.0.0.1])
	by mh8.mail.rice.edu (Postfix) with ESMTP id B9A9E297623;
	Thu, 29 Dec 2011 16:52:30 -0600 (CST)
X-Virus-Scanned: by amavis-2.6.4 at mh8.mail.rice.edu, auth channel
Received: from mh8.mail.rice.edu ([127.0.0.1])
	by mh8.mail.rice.edu (mh8.mail.rice.edu [127.0.0.1]) (amavis,
	port 10026)
	with ESMTP id iAwOc+aFZ+BR; Thu, 29 Dec 2011 16:52:30 -0600 (CST)
Received: from adsl-216-63-78-18.dsl.hstntx.swbell.net
	(adsl-216-63-78-18.dsl.hstntx.swbell.net [216.63.78.18])
	(using TLSv1 with cipher RC4-MD5 (128/128 bits))
	(No client certificate requested) (Authenticated sender: alc)
	by mh8.mail.rice.edu (Postfix) with ESMTPSA id 440D9291BE9;
	Thu, 29 Dec 2011 16:52:30 -0600 (CST)
Message-ID: <4EFCEF2D.4080007@rice.edu>
Date: Thu, 29 Dec 2011 16:52:29 -0600
From: Alan Cox <alc@rice.edu>
User-Agent: Mozilla/5.0 (X11; FreeBSD i386;
	rv:8.0) Gecko/20111113 Thunderbird/8.0
MIME-Version: 1.0
To: Sean Bruno <seanbru@yahoo-inc.com>
References: <4EEB9CCE.6090701@rice.edu>
	<1324169806.3093.3.camel@hitfishpass-lx.corp.yahoo.com>
	<4EED4982.3080208@freebsd.org>
	<1324339762.3093.14.camel@hitfishpass-lx.corp.yahoo.com>
	<4EF04F3C.9010309@rice.edu>
	<1324387685.3093.28.camel@hitfishpass-lx.corp.yahoo.com>
	<4EF0D8D7.2060503@rice.edu> <4EF0EC1A.4010604@freebsd.org>
	<1324412718.12783.10.camel@hitfishpass-lx.corp.yahoo.com>
	<4EF245D1.2050503@rice.edu>
	<1324679157.17645.6.camel@hitfishpass-lx.corp.yahoo.com>
	<4EFA0313.6030105@rice.edu>
	<1325028241.17645.10.camel@hitfishpass-lx.corp.yahoo.com>
	<4EFCCC06.4020001@rice.edu>
	<1325197722.17645.14.camel@hitfishpass-lx.corp.yahoo.com>
In-Reply-To: <1325197722.17645.14.camel@hitfishpass-lx.corp.yahoo.com>
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit
Cc: Alan Cox <alc@cs.rice.edu>, "xen@freebsd.org" <xen@freebsd.org>
Subject: Re: PV i386 patch
X-BeenThere: freebsd-xen@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Discussion of the freebsd port to xen - implementation and usage
	<freebsd-xen.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-xen>,
	<mailto:freebsd-xen-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-xen>
List-Post: <mailto:freebsd-xen@freebsd.org>
List-Help: <mailto:freebsd-xen-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-xen>,
	<mailto:freebsd-xen-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 29 Dec 2011 22:52:31 -0000

On 12/29/2011 16:28, Sean Bruno wrote:
> On Thu, 2011-12-29 at 12:22 -0800, Alan Cox wrote:
>> Please try this patch.  It eliminates a race condition that might
>> actually account for some of the crashes in FreeBSD>= 9 on Xen.
>>
>> Alan
>>
> ref10-xen32.freebsd.org has this applied now.  Looks ok to me?
>


I know that lmbench's bw_pipe program exercises the code path that I 
changed if you want to give it a bit more testing.

Alan