From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 954811E1C38; Wed, 9 Oct 2024 15:06:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728486389; cv=none; b=BKMVd3EbeRbfR8Wls9gOw2SMP1/bo+5KJAfJE7sMOsZ5VKh+zyCoWUFkMfgMIJbg4yrHy6NoJ0R/w7oGSbk1JA2dAIf2LD1qVWRnDk1MWd6UKYUtH8GoEXg72qnMI1mkTRSRcT4ouY8QR7SpMyHciBgRn7iAYDx+LVTOUMWqoA0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728486389; c=relaxed/simple; bh=GOfOzG0fD+GRAJQcUGGAR2F6juLmVMJ1gpAQWILv1vI=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=Ip8HIGSA2n6S/URgbKbkwOaWDQNJ6A9tWfTIqvOQsEG5cyMjqEDU3sh4IStbHlZDfWr2rOCbLzK/gf0StIFbQrv2qMgIAib8jc6ECKYkArQecwPwLTqC/fkXPSws6mo/VGrGy+9eWa798n4CsPzQefWdtCyEK7FSgT2tA8/A+K8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=dHgBTrUv; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="dHgBTrUv" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9E87CC4CEC5; Wed, 9 Oct 2024 15:06:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1728486389; bh=GOfOzG0fD+GRAJQcUGGAR2F6juLmVMJ1gpAQWILv1vI=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=dHgBTrUv1SJ4J1xPqWa86y8KnZRku+OSTxa1E7iRUFfjrpSn5XA3sMXPrT/3ISx2Q LsvrdcVswPRIAFyxqIG7C/PYfRNYO8iQ2WyLuY3vzpyYTJB+UlZMqCzfHd/OP9mGMf I2fToIWXK1w5UqrOT4KtRx8bnsg7o0bfKbabdTOIxH96Kaff/cifh/w//w1SEIlELG 70bscEQ9TTwSqI38JRrGuy3s9VawyMk+j8Aq5e2zoxoOTG7kLarXza1YD4otS1LrzE N6z+y7zDxoQZvcNjcODDpymOYqROIB+dJwJXyfK4WhpBkwmSbaCv07J+IxtDyrRY5w XCipjlUVQSNLg== Date: Wed, 9 Oct 2024 09:06:25 -0600 From: Keith Busch To: Christoph Hellwig Cc: Javier =?iso-8859-1?Q?Gonz=E1lez?= , Jens Axboe , "Martin K. Petersen" , Kanchan Joshi , hare@suse.de, sagi@grimberg.me, brauner@kernel.org, viro@zeniv.linux.org.uk, jack@suse.cz, jaegeuk@kernel.org, bcrl@kvack.org, dhowells@redhat.com, bvanassche@acm.org, asml.silence@gmail.com, linux-nvme@lists.infradead.org, linux-fsdevel@vger.kernel.org, io-uring@vger.kernel.org, linux-block@vger.kernel.org, linux-aio@kvack.org, gost.dev@samsung.com, vishak.g@samsung.com Subject: Re: [PATCH v7 0/3] FDP and per-io hints Message-ID: References: <20241004053121.GB14265@lst.de> <20241004061811.hxhzj4n2juqaws7d@ArmHalley.local> <20241004062733.GB14876@lst.de> <20241004065233.oc5gqcq3lyaxzjhz@ArmHalley.local> <20241004123027.GA19168@lst.de> <20241007101011.boufh3tipewgvuao@ArmHalley.local> <20241008122535.GA29639@lst.de> <20241009092828.GA18118@lst.de> Precedence: bulk X-Mailing-List: io-uring@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20241009092828.GA18118@lst.de> On Wed, Oct 09, 2024 at 11:28:28AM +0200, Christoph Hellwig wrote: > On Tue, Oct 08, 2024 at 08:44:28AM -0600, Keith Busch wrote: > > Then let's just continue with patches 1 and 2. They introduce no new > > user or kernel APIs, and people have already reported improvements using > > it. > > They are still not any way actually exposing the FDP functionality > in the standard though. How is your application going to align > anything to the reclaim unit? Or is this another of the cases where > as a hyperscaler you just "know" from the data sheet? As far as I know, this is an inconsequential spec detail that is not being considered by any applications testing this. And yet, the expected imrpovements are still there, so I don't see a point holding this up for that reason.