From owner-freebsd-current@FreeBSD.ORG  Wed Jan 11 17:04:21 2012
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 979B9106568E;
	Wed, 11 Jan 2012 17:04:21 +0000 (UTC)
	(envelope-from scottl@samsco.org)
Received: from pooker.samsco.org (pooker.samsco.org [168.103.85.57])
	by mx1.freebsd.org (Postfix) with ESMTP id 642978FC0A;
	Wed, 11 Jan 2012 17:04:21 +0000 (UTC)
Received: from [127.0.0.1] (pooker.samsco.org [168.103.85.57])
	(authenticated bits=0)
	by pooker.samsco.org (8.14.5/8.14.5) with ESMTP id q0BH4Ds9012322;
	Wed, 11 Jan 2012 10:04:13 -0700 (MST)
	(envelope-from scottl@samsco.org)
Mime-Version: 1.0 (Apple Message framework v1251.1)
Content-Type: text/plain; charset=us-ascii
From: Scott Long <scottl@samsco.org>
In-Reply-To: <1326301229.2419.78.camel@revolution.hippie.lan>
Date: Wed, 11 Jan 2012 10:04:13 -0700
Content-Transfer-Encoding: quoted-printable
Message-Id: <DB59B502-AD8E-44C8-A748-A5BAC9EAA323@samsco.org>
References: <20120110213719.GA92799@onelab2.iet.unipi.it>
	<201201111005.28610.jhb@freebsd.org>
	<20120111162944.GB2266@onelab2.iet.unipi.it>
	<201201111149.44067.jhb@freebsd.org>
	<1326301229.2419.78.camel@revolution.hippie.lan>
To: Ian Lepore <freebsd@damnhippie.dyndns.org>
X-Mailer: Apple Mail (2.1251.1)
X-Spam-Status: No, score=-50.0 required=3.8 tests=ALL_TRUSTED,
	T_RP_MATCHES_RCVD autolearn=unavailable version=3.3.0
X-Spam-Checker-Version: SpamAssassin 3.3.0 (2010-01-18) on pooker.samsco.org
Cc: freebsd-current@freebsd.org
Subject: Re: memory barriers in bus_dmamap_sync() ?
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: Wed, 11 Jan 2012 17:04:21 -0000


On Jan 11, 2012, at 10:00 AM, Ian Lepore wrote:

>=20
> I've wished (in the ARM world) for the ability to sync a portion of a
> map.  I've even kicked around the idea of proposing an API extension =
to
> do so, but I guess if FreeBSD went out of its way to remove that
> functionality that idea probably won't fly. :)

It's been discussed numerous times since mips and arm became relevant in =
FreeBSD, and I'm frankly surprised that it hasn't happened yet.  Go =
forth and code, it won't be opposed.

Scott