From owner-freebsd-geom@FreeBSD.ORG Sat Dec 20 20:09:18 2014 Return-Path: Delivered-To: freebsd-geom@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 0E155EB5; Sat, 20 Dec 2014 20:09:18 +0000 (UTC) Received: from na01-by2-obe.outbound.protection.outlook.com (mail-by2on0088.outbound.protection.outlook.com [207.46.100.88]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (Client CN "mail.protection.outlook.com", Issuer "MSIT Machine Auth CA 2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 9037B2FF7; Sat, 20 Dec 2014 20:09:16 +0000 (UTC) Received: from BN3PR0801MB0930.namprd08.prod.outlook.com (25.160.184.24) by BN3PR0801MB1138.namprd08.prod.outlook.com (25.161.218.23) with Microsoft SMTP Server (TLS) id 15.1.36.23; Sat, 20 Dec 2014 19:54:08 +0000 Received: from BN3PR0801MB0931.namprd08.prod.outlook.com (25.160.184.25) by BN3PR0801MB0930.namprd08.prod.outlook.com (25.160.184.24) with Microsoft SMTP Server (TLS) id 15.1.36.22; Sat, 20 Dec 2014 19:54:06 +0000 Received: from BN3PR0801MB0931.namprd08.prod.outlook.com ([25.160.184.25]) by BN3PR0801MB0931.namprd08.prod.outlook.com ([25.160.184.25]) with mapi id 15.01.0036.010; Sat, 20 Dec 2014 19:54:06 +0000 From: "Pokala, Ravi" To: Adrian Chadd Subject: Re: Converting LBAs to byte offsets through the GEOM stack Thread-Topic: Converting LBAs to byte offsets through the GEOM stack Thread-Index: AQHQGxf+kE6X/QdjbU+vuIDpLz2I5ZyWJp0A//9/yoCAAlgOAIAAYqmA Date: Sat, 20 Dec 2014 19:54:06 +0000 Message-ID: References: <20141219015210.GY25139@funkthat.com> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: user-agent: Microsoft-MacOutlook/14.4.7.141117 x-originating-ip: [24.6.178.251] authentication-results: spf=none (sender IP is ) smtp.mailfrom=rpokala@panasas.com; x-microsoft-antispam: BCL:0;PCL:0;RULEID:;SRVR:BN3PR0801MB0930;UriScan:; x-exchange-antispam-report-test: UriScan:; x-exchange-antispam-report-cfa-test: BCL:0; PCL:0; RULEID:; SRVR:BN3PR0801MB0930; x-forefront-prvs: 0431F981D8 x-forefront-antispam-report: SFV:NSPM; SFS:(10009020)(6009001)(199003)(164054003)(189002)(83506001)(93886004)(77156002)(99396003)(31966008)(62966003)(36756003)(76176999)(106356001)(86362001)(99286002)(558084003)(87936001)(92566001)(4396001)(106116001)(120916001)(105586002)(2656002)(50986999)(21056001)(2900100001)(102836002)(2950100001)(66066001)(20776003)(122556002)(64706001)(101416001)(46102003)(40100003)(68736005)(97736003)(54356999)(107046002)(110136001); DIR:OUT; SFP:1101; SCL:1; SRVR:BN3PR0801MB0930; H:BN3PR0801MB0931.namprd08.prod.outlook.com; FPR:; SPF:None; MLV:sfv; PTR:InfoNoRecords; A:1; MX:1; LANG:en; received-spf: None (protection.outlook.com: panasas.com does not designate permitted sender hosts) Content-Type: text/plain; charset="us-ascii" Content-ID: <09FAC75C781BCE4D81EABF4E791E14E6@namprd08.prod.outlook.com> Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-MS-Exchange-CrossTenant-originalarrivaltime: 20 Dec 2014 19:54:06.3125 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: acf01c9d-c699-42af-bdbb-44bf582e60b0 X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN3PR0801MB0930 X-Microsoft-Antispam: BCL:0;PCL:0;RULEID:;SRVR:BN3PR0801MB1138; X-OriginatorOrg: panasas.com Cc: John-Mark Gurney , "freebsd-geom@freebsd.org" X-BeenThere: freebsd-geom@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: GEOM-specific discussions and implementations List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 20 Dec 2014 20:09:18 -0000 Hi Adrian, >So when doing stuff like this, I ended up piggybacking commands through >the translation layers, so stuff was done (a) in line with the rest of IO >processing, and (b) wouldn't suffer from stale data. Could you expand on that a little? Thanks, Ravi