From owner-freebsd-current@FreeBSD.ORG  Wed Mar 27 21:32:48 2013
Return-Path: <owner-freebsd-current@FreeBSD.ORG>
Delivered-To: freebsd-current@FreeBSD.org
Received: from mx1.freebsd.org (mx1.freebsd.org
 [IPv6:2001:1900:2254:206a::19:1])
 by hub.freebsd.org (Postfix) with ESMTP id 8A1C0ACC;
 Wed, 27 Mar 2013 21:32:48 +0000 (UTC)
 (envelope-from sgk@troutmask.apl.washington.edu)
Received: from troutmask.apl.washington.edu (troutmask.apl.washington.edu
 [128.95.76.21]) by mx1.freebsd.org (Postfix) with ESMTP id 6EC99274;
 Wed, 27 Mar 2013 21:32:48 +0000 (UTC)
Received: from troutmask.apl.washington.edu (localhost.apl.washington.edu
 [127.0.0.1])
 by troutmask.apl.washington.edu (8.14.6/8.14.6) with ESMTP id r2RLWgZ5067899; 
 Wed, 27 Mar 2013 14:32:42 -0700 (PDT)
 (envelope-from sgk@troutmask.apl.washington.edu)
Received: (from sgk@localhost)
 by troutmask.apl.washington.edu (8.14.6/8.14.6/Submit) id r2RLWgDb067898;
 Wed, 27 Mar 2013 14:32:42 -0700 (PDT) (envelope-from sgk)
Date: Wed, 27 Mar 2013 14:32:42 -0700
From: Steve Kargl <sgk@troutmask.apl.washington.edu>
To: Alexander Motin <mav@FreeBSD.org>
Subject: Re: Any objections/comments on axing out old ATA stack?
Message-ID: <20130327213242.GA67876@troutmask.apl.washington.edu>
References: <51536306.5030907@FreeBSD.org>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <51536306.5030907@FreeBSD.org>
User-Agent: Mutt/1.5.21 (2010-09-15)
Cc: freebsd-current@FreeBSD.org, freebsd-stable@FreeBSD.org
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.14
Precedence: list
List-Id: Discussions about the use of FreeBSD-current
 <freebsd-current.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/options/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, 27 Mar 2013 21:32:48 -0000

On Wed, Mar 27, 2013 at 11:22:14PM +0200, Alexander Motin wrote:
> Hi.
> 
> Since FreeBSD 9.0 we are successfully running on the new CAM-based ATA 
> stack, using only some controller drivers of old ata(4) by having 
> `options ATA_CAM` enabled in all kernels by default. I have a wish to 
> drop non-ATA_CAM ata(4) code, unused since that time from the head 
> branch to allow further ATA code cleanup.
> 
> Does any one here still uses legacy ATA stack (kernel explicitly built 
> without `options ATA_CAM`) for some reason, for example as workaround 
> for some regression?

Yes, I use the legacy ATA stack.

> Does anybody have good ideas why we should not drop 
> it now?

Because it works?

-- 
Steve