From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 935BCC4708E for ; Fri, 2 Dec 2022 14:58:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233545AbiLBO6c (ORCPT ); Fri, 2 Dec 2022 09:58:32 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58984 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233666AbiLBO6X (ORCPT ); Fri, 2 Dec 2022 09:58:23 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C496010E4; Fri, 2 Dec 2022 06:58:22 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 4AFBC622DB; Fri, 2 Dec 2022 14:58:22 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 85441C433D6; Fri, 2 Dec 2022 14:58:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1669993101; bh=/n5CLN7ON3ycvsyEi1YxKOhSSwA+7yJQAUZB1mnM43M=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=NLW0hD+C9SLzRYcnnlslZYKphSt6MEcrihJeqdPpaJqTSgTHwpwCUV+1K4ySL51iI zwZnFsZstRt/oSuTBO2XFUPYkY64e0lrv2BoJFAwCHsrL3Sghpaqm2jkhbusu2UmvU L/pTsacxpT1DBAz36cESjdsRiQHtomfdRR9TEe707Cnv0BpwVQaQ4fFgOoGRPrwjoR p+0Zc73/Pw/hXzl+y8PuQrVRHcfZhA+DjhmKa1k+0sj8qD7jELK8hHYqoVBkWygG7V f1UQYT8rEc62M9Q/BTjYXZIsFJC7aXrqJX8DY/uv65a0YnMRw0fryjCHbkDqWgEb4n 7P7XZYU+Tn6Mg== Date: Fri, 2 Dec 2022 07:58:16 -0700 From: Keith Busch To: Hannes Reinecke Cc: Matthew Wilcox , Chaitanya Kulkarni , "linux-block@vger.kernel.org" , "linux-raid@vger.kernel.org" , "linux-nvme@lists.infradead.org" , "linux-fsdevel@vger.kernel.org" , "axboe@kernel.dk" , "djwong@kernel.org" , "hch@lst.de" , "sagi@grimberg.me" , "jejb@linux.ibm.com" , "martin.petersen@oracle.com" , "javier@javigon.com" , "johannes.thumshirn@wdc.com" , "bvanassche@acm.org" , "dongli.zhang@oracle.com" , "jefflexu@linux.alibaba.com" , "josef@toxicpanda.com" , "clm@fb.com" , "dsterba@suse.com" , "jack@suse.com" , "tytso@mit.edu" , "adilger.kernel@dilger.ca" , "jlayton@kernel.org" , "idryomov@gmail.com" , "danil.kipnis@cloud.ionos.com" , "ebiggers@google.com" , "jinpu.wang@cloud.ionos.com" Subject: Re: [PATCH 0/6] block: add support for REQ_OP_VERIFY Message-ID: References: <20220630091406.19624-1-kch@nvidia.com> <72a51a83-c25a-ef52-55fb-2b73aec70305@suse.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <72a51a83-c25a-ef52-55fb-2b73aec70305@suse.de> Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org On Fri, Dec 02, 2022 at 08:16:30AM +0100, Hannes Reinecke wrote: > On 12/1/22 20:39, Matthew Wilcox wrote: > > On Thu, Dec 01, 2022 at 06:12:46PM +0000, Chaitanya Kulkarni wrote: > > > So nobody can get away with a lie. > > > > And yet devices do exist which lie. I'm not surprised that vendors > > vehemently claim that they don't, or "nobody would get away with it". > > But, of course, they do. And there's no way for us to find out if > > they're lying! > > > But we'll never be able to figure that out unless we try. > > Once we've tried we will have proof either way. As long as the protocols don't provide proof-of-work, trying this doesn't really prove anything with respect to this concern.