From owner-freebsd-hackers@FreeBSD.ORG Thu Jul 10 07:01:42 2014 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id E9CFD5EB for ; Thu, 10 Jul 2014 07:01:42 +0000 (UTC) Received: from nskntmtas02p.mx.bigpond.com (nskntmtas02p.mx.bigpond.com [61.9.168.140]) by mx1.freebsd.org (Postfix) with ESMTP id 82A53291C for ; Thu, 10 Jul 2014 07:01:42 +0000 (UTC) Received: from nskntcmgw05p ([61.9.169.165]) by nskntmtas02p.mx.bigpond.com with ESMTP id <20140710070134.EFBF2564.nskntmtas02p.mx.bigpond.com@nskntcmgw05p>; Thu, 10 Jul 2014 07:01:34 +0000 Received: from hermes.heuristicsystems.com.au ([121.210.107.100]) by nskntcmgw05p with BigPond Outbound id QX1a1o00129zwdD01X1a6G; Thu, 10 Jul 2014 07:01:34 +0000 X-Authority-Analysis: v=2.0 cv=W5W6pGqk c=1 sm=1 a=SEJ2iDwVkb98DYvesvueMw==:17 a=FOfJmfHOgUsA:10 a=8nJEP1OIZ-IA:10 a=GHIR_BbyAAAA:8 a=tz2qsJCStIgtPGoDufsA:9 a=wPNLvfGTeEIA:10 a=0qwFS9rOb7oA:10 a=BlqBU5lJ4xUA:10 a=F-d4tdU4grsA:10 a=SEJ2iDwVkb98DYvesvueMw==:117 Received: from [10.0.5.3] (ewsw01.hs [10.0.5.3]) (authenticated bits=0) by hermes.heuristicsystems.com.au (8.14.5/8.13.6) with ESMTP id s6A72q0V005858 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES128-SHA bits=128 verify=NOT); Thu, 10 Jul 2014 17:03:00 +1000 (EST) (envelope-from dewayne.geraghty@heuristicsystems.com.au) Message-ID: <53BE3A34.8000103@heuristicsystems.com.au> Date: Thu, 10 Jul 2014 17:01:08 +1000 From: Dewayne Geraghty User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:24.0) Gecko/20100101 Thunderbird/24.6.0 MIME-Version: 1.0 To: RW , freebsd-hackers@freebsd.org Subject: Re: geli+trim support References: <7E2718485A3E405D89E5EAB331E9ED70@multiplay.co.uk> <53B6427D.1010403@gooch.io> <60445.1404461976@critter.freebsd.dk> <53B750C1.8070706@gooch.io> <43222.1404549367@critter.freebsd.dk> <20856DE3-6622-455D-9B15-B4723D75B0DB@gmail.com> <20140710004628.0b3deade@gumby.homeunix.com> In-Reply-To: <20140710004628.0b3deade@gumby.homeunix.com> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 10 Jul 2014 07:01:43 -0000 Thank-you RW for clarifying the discussion and looking at both sides of the issue. I agree that having TRIM available is, in my case, a preferred risk and thanks also to Wojciech for raising this as I was surprised to find that neither geli nor gshsec support BIO_DELETE. But whether to zero or generate random data per "/usr/src/sys/geom/eli/g_eli.c" (around line 282), I sense a sysctl coming... :)