From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755408Ab2LSUph (ORCPT ); Wed, 19 Dec 2012 15:45:37 -0500 Received: from aserp1040.oracle.com ([141.146.126.69]:45052 "EHLO aserp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752396Ab2LSUpa (ORCPT ); Wed, 19 Dec 2012 15:45:30 -0500 To: Mike Snitzer Cc: "Martin K. Petersen" , Joseph Salisbury , Kernel Team , linux-kernel@vger.kernel.org, jgarzik@redhat.com, JBottomley@Parallels.com, Milan Broz Subject: Re: [v3.7 Regression] [SCSI] sd: Implement support for WRITE SAME From: "Martin K. Petersen" Organization: Oracle References: <50CB8C74.3090102@canonical.com> <50D0C971.1000907@canonical.com> <20121219195801.GA14456@redhat.com> Date: Wed, 19 Dec 2012 15:45:25 -0500 In-Reply-To: <20121219195801.GA14456@redhat.com> (Mike Snitzer's message of "Wed, 19 Dec 2012 14:58:01 -0500") Message-ID: User-Agent: Gnus/5.130005 (Ma Gnus v0.5) Emacs/24.2 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-Source-IP: ucsinet21.oracle.com [156.151.31.93] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org >>>>> "Mike" == Mike Snitzer writes: Mike> But do we know mount to somwhow be issuing WRITE SAME requests? I'm assuming that ext4 is somehow calling sb_issue_zeroout(). Mike> Martin, why is it you weren't able to reproduce (I haven't Mike> attempted yet)? Dunno. But regardless of any bugs, WRITE SAME will still need some special attention in the context of dm-crypt. -- Martin K. Petersen Oracle Linux Engineering