From mboxrd@z Thu Jan 1 00:00:00 1970 From: malahal@us.ibm.com Subject: Re: [PATCH 05 of 16] Block layer data integrity Date: Tue, 6 May 2008 19:50:20 -0700 Message-ID: <20080507025019.GA32000@us.ibm.com> References: <26ccaf2ccdc5548c4c9f.1209165127@sermon.lab.mkp.net> <20080506202909.GA25904@us.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from e32.co.us.ibm.com ([32.97.110.150]:42004 "EHLO e32.co.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755067AbYEGCuV (ORCPT ); Tue, 6 May 2008 22:50:21 -0400 Received: from d03relay04.boulder.ibm.com (d03relay04.boulder.ibm.com [9.17.195.106]) by e32.co.us.ibm.com (8.13.8/8.13.8) with ESMTP id m472lLEq002325 for ; Tue, 6 May 2008 22:47:21 -0400 Received: from d03av01.boulder.ibm.com (d03av01.boulder.ibm.com [9.17.195.167]) by d03relay04.boulder.ibm.com (8.13.8/8.13.8/NCO v8.7) with ESMTP id m472oKUP148208 for ; Tue, 6 May 2008 20:50:20 -0600 Received: from d03av01.boulder.ibm.com (loopback [127.0.0.1]) by d03av01.boulder.ibm.com (8.12.11.20060308/8.13.3) with ESMTP id m472oKXv014190 for ; Tue, 6 May 2008 20:50:20 -0600 Received: from malahal.beaverton.ibm.com (malahal.beaverton.ibm.com [9.47.17.130]) by d03av01.boulder.ibm.com (8.12.11.20060308/8.12.11) with ESMTP id m472oKJ2014182 for ; Tue, 6 May 2008 20:50:20 -0600 Content-Disposition: inline In-Reply-To: Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: linux-scsi@vger.kernel.org Martin K. Petersen [martin.petersen@oracle.com] wrote: > But generally, yes. It is up to the submitter to guarantee that the > page isn't being modified during I/O. This requirement will trickle > all the way to the top of the stack for things like direct I/O. Understandable for direct I/O. How does an application using mmap for writing can control this? Does that mean mmap writes are not really supported? --Malahal.