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 6B7C2C27C5E for ; Mon, 10 Jun 2024 11:55:56 +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=GO927bW8DsaPXRnTFTbB35PB53Iq+dTk7uhgqvI5xEA=; b=CoAWq7TsbloWDVF/0GTAwM6vzX 36p5dormxHNGE5dVzMmlIPdmOzE1vQhZk7w6ESdrOdf5Bt4Wozf3QFAOclld9Ln/MhRn8WYY4NGHR 5oumlqXCX6McYKIyHV4G2qveWvMgFiNDpn+9CrQrY2WoiunYnB1MuYHWnGooSfs1nfrdQO+r7hpid JnK7gNDPYQG85Kngrwy+HRsB+it5cvJRHUJy2xORRDydEMt31gq9z8whfXf3m8E8smSlzhzYr7As8 CjN3D9SqoEdMEerYM44lZNDLteebe4A5FGxFhbd15ytOUThBGbdKCK7YUXTjYMrbWaBsDYZOTeKkj 1VC8sO1Q==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sGdcx-00000004t2g-1lhD; Mon, 10 Jun 2024 11:55:55 +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 1sGdco-00000004sxW-2IVC for linux-nvme@lists.infradead.org; Mon, 10 Jun 2024 11:55:52 +0000 Received: by verein.lst.de (Postfix, from userid 2407) id A0EF967373; Mon, 10 Jun 2024 13:55:41 +0200 (CEST) Date: Mon, 10 Jun 2024 13:55:41 +0200 From: Christoph Hellwig To: "Martin K. Petersen" Cc: Kanchan Joshi , Christoph Hellwig , Keith Busch , axboe@kernel.dk, sagi@grimberg.me, linux-nvme@lists.infradead.org, javier.gonz@samsung.com, bvanassche@acm.org, gost.dev@samsung.com, Hui Qi , Nitesh Shetty Subject: Re: [PATCH v2] nvme: enable FDP support Message-ID: <20240610115541.GB19495@lst.de> References: <20240528150233.55562-1-joshi.k@samsung.com> <20240608051740.GA24010@lst.de> <5e686875-21de-869d-4b19-bdd9e272d690@samsung.com> 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_045546_866464_C5F8E6C9 X-CRM114-Status: GOOD ( 14.84 ) 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 07:27:16AM -0400, Martin K. Petersen wrote: > > And TP 4146 author list shows 10 companies. Perhaps good enough for > > diverse opinions on how to go about things before settling down. > > I think FDP and SCSI streams are less than ideal. 10+ years and the > standards bodies still haven't been able to produce an approach that > makes sense in the context of a general purpose operating system. The SCSI temperature hints are I think exactly what we want. The fact that they had to be shoe horned in in a weird to claim to be streams is a little awkward, but sometimes that's need to get things done. Hint to Samsung and Meta: if you have to hack them into NVMe to still claim it's FDP so that you marketing budget isn't lost we can probably live with that..