From owner-freebsd-current@freebsd.org Tue Oct 20 01:47:07 2015 Return-Path: Delivered-To: freebsd-current@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 29BCAA198E6 for ; Tue, 20 Oct 2015 01:47:07 +0000 (UTC) (envelope-from wblock@wonkity.com) Received: from wonkity.com (wonkity.com [67.158.26.137]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "wonkity.com", Issuer "wonkity.com" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id BF4097D5; Tue, 20 Oct 2015 01:47:06 +0000 (UTC) (envelope-from wblock@wonkity.com) Received: from wonkity.com (localhost [127.0.0.1]) by wonkity.com (8.15.2/8.15.2) with ESMTPS id t9K1ktID049506 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Mon, 19 Oct 2015 19:46:55 -0600 (MDT) (envelope-from wblock@wonkity.com) Received: from localhost (wblock@localhost) by wonkity.com (8.15.2/8.15.2/Submit) with ESMTP id t9K1kpYv049497; Mon, 19 Oct 2015 19:46:51 -0600 (MDT) (envelope-from wblock@wonkity.com) Date: Mon, 19 Oct 2015 19:46:51 -0600 (MDT) From: Warren Block To: John-Mark Gurney cc: Ed Maste , "O. Hartmann" , "Julian H. Stacey" , Yonas Yanfa , FreeBSD Current Subject: Re: Depreciate and remove gbde In-Reply-To: <20151019223813.GH65715@funkthat.com> Message-ID: References: <56237623.5010702@fizk.net> <201510182329.t9INTarc018248@fire.js.berklix.net> <20151019061930.461285f8@freyja.zeit4.iv.bundesimmobilien.de> <20151019205008.GG65715@funkthat.com> <20151019223813.GH65715@funkthat.com> User-Agent: Alpine 2.20 (BSF 67 2015-01-07) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.4.3 (wonkity.com [127.0.0.1]); Mon, 19 Oct 2015 19:46:55 -0600 (MDT) X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 20 Oct 2015 01:47:07 -0000 On Mon, 19 Oct 2015, John-Mark Gurney wrote: > Ed Maste wrote this message on Mon, Oct 19, 2015 at 17:13 -0400: >> On 19 October 2015 at 16:50, John-Mark Gurney wrote: >>> O. Hartmann wrote this message on Mon, Oct 19, 2015 at 06:19 +0200: >>>> For me, I'd like to know what is the benefit/performance of each technique and >>>> a clear preparation of each ones advantages over the other. That would make the >>>> decission process much easier and hopefully would not scare people away and >>>> announce "FreeBSD does not have a, b, c, ..." ... >>> >>> So, one thing that the docs talk about is that geli uses the crypto(9) >>> framework. This doesn't mean much on it's own, but if you have a machine >>> with AES-NI instructions or an accelerator card that supports the cipher >>> mode used, then you can get faster performance of hardware off load, >>> while gbde uses the software only routines which are slow.. >> >> John-Mark, thanks for listing these differences. This is the sort of >> information we should have available for end users to help choose one >> or the other -- this info ought to make it into the handbook. > > I'm working on updating the section now... > > Also realized we should include verbage to say that it's best to use > page size sectors when possible to reduce overhead of the crypto... I can help with markup and editing.