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 80050D13570 for ; Mon, 28 Oct 2024 11:49:32 +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=b7MNEALBjD7TFR6OpglGXkIxV+TEMrq2CJi1qRFeTWw=; b=hMfbHiFysTJqvT6NgVhZRF7Gb5 gilWkhFjjlnpCwdNj1MyVcX5VBFwU4AvfrG8MLOXImfiGHYfBngDM7sHk8w1z3SNyKuPBdJ0JXmIf Mt+13QaQXEdh8dGqJOezXCgkehI59Mw1wZVuIDlX5EPOF5EZOJhMCv4mSHLQD/Uj9nYe9CCw3P9V6 sc23QUoZXa5uZrnwpXL8kp9ueI0l/SyvbBSKuAHqCLf1E5htQrvi91LwEanDa6K/6dtBOTv1ilNJr yjmypik7zNe7E3uWLe4V1y3180C9PSUOFm3DwCdaKd4GeK0OAKdOYrxmxvy5uo/r1QYQ3+eouZnZb h3H32KbA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1t5OFW-0000000Acbg-15BG; Mon, 28 Oct 2024 11:49:30 +0000 Received: from verein.lst.de ([213.95.11.211]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1t5OFT-0000000AcZZ-02Qi for linux-nvme@lists.infradead.org; Mon, 28 Oct 2024 11:49:28 +0000 Received: by verein.lst.de (Postfix, from userid 2407) id 09616227A88; Mon, 28 Oct 2024 12:49:16 +0100 (CET) Date: Mon, 28 Oct 2024 12:49:14 +0100 From: Christoph Hellwig To: Keith Busch Cc: linux-block@vger.kernel.org, linux-nvme@lists.infradead.org, linux-scsi@vger.kernel.org, io-uring@vger.kernel.org, linux-fsdevel@vger.kernel.org, hch@lst.de, joshi.k@samsung.com, javier.gonz@samsung.com, bvanassche@acm.org, Keith Busch Subject: Re: [PATCHv9 0/7] write hints with nvme fdp, scsi streams Message-ID: <20241028114913.GA8517@lst.de> References: <20241025213645.3464331-1-kbusch@meta.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20241025213645.3464331-1-kbusch@meta.com> 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-20241028_044927_209713_F6D4D2DC X-CRM114-Status: GOOD ( 10.33 ) 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 Fri, Oct 25, 2024 at 02:36:38PM -0700, Keith Busch wrote: > Upfront, I really didn't get the feedback about setting different flags > for stream vs. temperature support. Who wants to use it, and where and > how is that information used? The SBC permanent streams have a 'relative lifetime' associated with them. So if you expose them as plain write streams you violate the contract with the device.