Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754680Ab1BVQsI (ORCPT ); Tue, 22 Feb 2011 11:48:08 -0500 Received: from rcsinet10.oracle.com ([148.87.113.121]:21320 "EHLO rcsinet10.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754509Ab1BVQsF (ORCPT ); Tue, 22 Feb 2011 11:48:05 -0500 To: djwong@us.ibm.com Cc: Jens Axboe , linux-kernel , linux-fsdevel@vger.kernel.org, Mingming Cao , linux-scsi Subject: Re: [RFC] block integrity: Fix write after checksum calculation problem From: "Martin K. Petersen" Organization: Oracle References: <20110222020022.GH32261@tux1.beaverton.ibm.com> Date: Tue, 22 Feb 2011 11:45:44 -0500 In-Reply-To: <20110222020022.GH32261@tux1.beaverton.ibm.com> (Darrick J. Wong's message of "Mon, 21 Feb 2011 18:00:22 -0800") Message-ID: User-Agent: Gnus/5.110013 (No Gnus v0.13) Emacs/23.2 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-Source-IP: acsmt353.oracle.com [141.146.40.153] X-Auth-Type: Internal IP X-CT-RefId: str=0001.0A090203.4D63E875.004F:SCFMA4539814,ss=1,fgs=0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 866 Lines: 22 >>>>> "Darrick" == Darrick J Wong writes: Darrick> Unfortunately, I didn't get a sense that any sort of consensus Darrick> had been reached We had a session on this topic at the storage workshop in Auguest. The consensus was that filesystems really need to handle this. Also, DIX is only the tip of the iceberg. Many other impending technologies feature checksums and require pages to be stable during I/O due to checksumming, encryption and so on. The VM is already trying to do the right thing. We just need the relevant filesystems to catch up. -- Martin K. Petersen Oracle Linux Engineering -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/