From owner-freebsd-current@FreeBSD.ORG  Wed Mar 27 21:22:19 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 8C0442CA;
 Wed, 27 Mar 2013 21:22:19 +0000 (UTC)
 (envelope-from mavbsd@gmail.com)
Received: from mail-ea0-x22f.google.com (mail-ea0-x22f.google.com
 [IPv6:2a00:1450:4013:c01::22f])
 by mx1.freebsd.org (Postfix) with ESMTP id 02D281AF;
 Wed, 27 Mar 2013 21:22:18 +0000 (UTC)
Received: by mail-ea0-f175.google.com with SMTP id r16so942618ead.34
 for <multiple recipients>; Wed, 27 Mar 2013 14:22:18 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113;
 h=x-received:sender:message-id:date:from:user-agent:mime-version:to
 :subject:content-type:content-transfer-encoding;
 bh=MTlu+UZE3yX57RtzoQ2geUxJlRwzGO2jEHD+sFXp0OY=;
 b=WJCxkl2Jk4UBSYzIVxhX9x/4MJ2+k8TtI9W8oacE/6YedYwpMwBf5hZvSRSAG0BXxu
 BJ/30KU6kqSbwK3v95AuzkrRYPxxIx+RAAceLdkLUMYyM+q0vS9IQzAPgqK55RI4QkDo
 jUatO4FOhNZKrH3fkV/8jlUmOy8lExQWVGBIqv8khlw09upONUw2Djt2h9k9p17ZZdB7
 q/YPmb4HHhMxtWR0YRY3vuq+7tl51FDQQ0pvL5TpZs/pGmLlTt79Xq+yQUTZNeUR60rx
 OsC3c5bYH+1M4t6ssOIlZdGS2AM9cc2nDT4hwWUVHPvnypa6++RuHyCoiSMzpyshRChh
 gg1g==
X-Received: by 10.15.36.135 with SMTP id i7mr39357547eev.34.1364419338167;
 Wed, 27 Mar 2013 14:22:18 -0700 (PDT)
Received: from mavbook.mavhome.dp.ua (mavhome.mavhome.dp.ua. [213.227.240.37])
 by mx.google.com with ESMTPS id h5sm33867550eem.1.2013.03.27.14.22.16
 (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128);
 Wed, 27 Mar 2013 14:22:17 -0700 (PDT)
Sender: Alexander Motin <mavbsd@gmail.com>
Message-ID: <51536306.5030907@FreeBSD.org>
Date: Wed, 27 Mar 2013 23:22:14 +0200
From: Alexander Motin <mav@FreeBSD.org>
User-Agent: Mozilla/5.0 (X11; FreeBSD amd64;
 rv:17.0) Gecko/20130326 Thunderbird/17.0.4
MIME-Version: 1.0
To: freebsd-current@FreeBSD.org, freebsd-stable@FreeBSD.org
Subject: Any objections/comments on axing out old ATA stack?
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
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 21:22:19 -0000

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

-- 
Alexander Motin