From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Martin K. Petersen" Subject: Re: UNMAP command parameter list Date: Mon, 10 Nov 2014 12:52:35 -0500 Message-ID: References: <94D0CD8314A33A4D9D801C0FE68B40295937B4CE@G4W3202.americas.hpqcorp.net> <20141110174043.GA26944@infradead.org> Mime-Version: 1.0 Content-Type: text/plain Return-path: Received: from userp1040.oracle.com ([156.151.31.81]:43160 "EHLO userp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753284AbaKJRxH (ORCPT ); Mon, 10 Nov 2014 12:53:07 -0500 In-Reply-To: <20141110174043.GA26944@infradead.org> (Christoph Hellwig's message of "Mon, 10 Nov 2014 09:40:43 -0800") Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: Christoph Hellwig Cc: "Martin K. Petersen" , Andras Kovacs , linux-scsi@vger.kernel.org >>>>> "Christoph" == Christoph Hellwig writes: Christoph> Note that if the hardware doesn't actually implement UNMAP Christoph> and you have to emulate something you're probably better off Christoph> emulating WRITE SAME (16) with the UNMAP bit, as the format Christoph> is a lot easier to handle, and it's much better specified to Christoph> start with. Yup, absolutely! -- Martin K. Petersen Oracle Linux Engineering