From owner-freebsd-hackers@freebsd.org  Mon Feb 20 13:49:19 2017
Return-Path: <owner-freebsd-hackers@freebsd.org>
Delivered-To: freebsd-hackers@mailman.ysv.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org
 [IPv6:2001:1900:2254:206a::19:1])
 by mailman.ysv.freebsd.org (Postfix) with ESMTP id 78DE9CE5AE8
 for <freebsd-hackers@mailman.ysv.freebsd.org>;
 Mon, 20 Feb 2017 13:49:19 +0000 (UTC) (envelope-from slw@zxy.spb.ru)
Received: from zxy.spb.ru (zxy.spb.ru [195.70.199.98])
 (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
 (Client did not present a certificate)
 by mx1.freebsd.org (Postfix) with ESMTPS id 3CAFA1CF9;
 Mon, 20 Feb 2017 13:49:19 +0000 (UTC) (envelope-from slw@zxy.spb.ru)
Received: from slw by zxy.spb.ru with local (Exim 4.86 (FreeBSD))
 (envelope-from <slw@zxy.spb.ru>)
 id 1cfoL0-0006uz-HH; Mon, 20 Feb 2017 16:49:10 +0300
Date: Mon, 20 Feb 2017 16:49:10 +0300
From: Slawa Olhovchenkov <slw@zxy.spb.ru>
To: freebsd-hackers@freebsd.org, allanjude@freebsd.org
Subject: Re: GSoC Project Involving the reimplementation of beadm(1)
Message-ID: <20170220134910.GC15630@zxy.spb.ru>
References: <20170220131509.GA31623@tomoyat1.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20170220131509.GA31623@tomoyat1.com>
User-Agent: Mutt/1.5.24 (2015-08-30)
X-SA-Exim-Connect-IP: <locally generated>
X-SA-Exim-Mail-From: slw@zxy.spb.ru
X-SA-Exim-Scanned: No (on zxy.spb.ru); SAEximRunCond expanded to false
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.23
Precedence: list
List-Id: Technical Discussions relating to FreeBSD
 <freebsd-hackers.freebsd.org>
List-Unsubscribe: <https://lists.freebsd.org/mailman/options/freebsd-hackers>, 
 <mailto:freebsd-hackers-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-hackers/>
List-Post: <mailto:freebsd-hackers@freebsd.org>
List-Help: <mailto:freebsd-hackers-request@freebsd.org?subject=help>
List-Subscribe: <https://lists.freebsd.org/mailman/listinfo/freebsd-hackers>, 
 <mailto:freebsd-hackers-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Mon, 20 Feb 2017 13:49:19 -0000

On Mon, Feb 20, 2017 at 10:15:09PM +0900, Tomoya Tabuchi wrote:

> Hello,
> 
> I am interested in doing a GSoC project this year with the idea "Write a
> new boot environment manager" on the ideas list.
> (https://wiki.freebsd.org/SummerOfCodeIdeas#Write_a_new_boot_environment_manager)
> 
> I would like to ask a few questions involving this.
> First, is there a particular reason why this project is listed in the
> ideas list? Aside the fact the current implementation in sh is rather
> complicated, I was unable to come up with a reason to justify the
> reimplementation.
> 
> Second, is making the new implmentation of beadm(1) platform independent
> and promoting it across the various OpenZFS implmentation / communities
> as some sort of "standard" implmentation a good idea, or is it
> over-zealous / outside of the project scope / intrusive to other
> projects.
> 
> As for a late self introduction, my name is Tomoya Tabuchi, and I am a
> undergraduate student at Doshisha University in Japan. I will start my
> third year in university in April.

Don't know about link above. For me, current beadm have some leaks:

1. Don't check cosistency before applay:
  I am try to enable beadm on 10.1 install and switch to 11.0.
  fail.

2. Need to control what put under beadm.

All of this don't need to rewrite all beadm, IMHO.