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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 34BF9C27C5E for ; Mon, 10 Jun 2024 11:57:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=wZo3f9pJATctPvKJA3FrY65kpNLIdM274XUZC+MwwZs=; b=NRJ4BnnoZRab/xUECUx0NRmUUn LPXj2b1np/nzfHf5kruV4ZqUJ5LJs3PMIUvput1s1V3uyekJGVsPTN0ISEKVaB67yCydljjAD7o5m 6wdyU6lrJrBmhvpzD+3L0dk/8/+3SqYXUBABXpRymcn+YjEBQvVl3bkzwaqeyjTONz6GbACCnIwTI ibJetpY2xIwy0F33Avj7zYbJ4upBybqjXZ7Mb+tMT4VOKVFr0Ak/nNzlfC/3hKVcEdPtP+aLXORjm rseIbA+XU6/9tFA6FueXmkJZycOfW/JsworxfPwjV1CFVqb8phCgTYaQfZ7ANNasaUr3QLRdZJxqg /s93LnzQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sGdef-00000004tvB-0jL4; Mon, 10 Jun 2024 11:57:41 +0000 Received: from verein.lst.de ([213.95.11.211]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1sGdeb-00000004tsJ-2W9T for linux-nvme@lists.infradead.org; Mon, 10 Jun 2024 11:57:39 +0000 Received: by verein.lst.de (Postfix, from userid 2407) id 5778867373; Mon, 10 Jun 2024 13:57:33 +0200 (CEST) Date: Mon, 10 Jun 2024 13:57:32 +0200 From: Christoph Hellwig To: "Martin K. Petersen" Cc: Christoph Hellwig , Jens Axboe , Mike Snitzer , Mikulas Patocka , Song Liu , Yu Kuai , Dan Williams , Vishal Verma , Dave Jiang , Ira Weiny , Keith Busch , Sagi Grimberg , Chaitanya Kulkarni , linux-block@vger.kernel.org, dm-devel@lists.linux.dev, linux-raid@vger.kernel.org, nvdimm@lists.linux.dev, linux-nvme@lists.infradead.org, linux-scsi@vger.kernel.org, Bart Van Assche , Kanchan Joshi Subject: Re: [PATCH 03/11] block: remove the BIP_IP_CHECKSUM flag Message-ID: <20240610115732.GA19790@lst.de> References: <20240607055912.3586772-1-hch@lst.de> <20240607055912.3586772-4-hch@lst.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.17 (2007-11-01) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240610_045737_864918_46814D86 X-CRM114-Status: GOOD ( 13.57 ) X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org On Mon, Jun 10, 2024 at 07:56:00AM -0400, Martin K. Petersen wrote: > > Remove the BIP_IP_CHECKSUM as sd can just look at the per-disk > > checksum type instead. > > This removes the ability to submit an individual I/O using a CRC instead > of the IP checksum. There are cases which can't be expressed when > the controller is operating in IP checksum mode. Huh, how?