From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from verein.lst.de (verein.lst.de [213.95.11.211]) (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 83D101D0BBE; Wed, 2 Oct 2024 15:13:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=213.95.11.211 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727882040; cv=none; b=HRMXEW1eNF6W1q0XU6+HmDeSEXATW+p53cuVR+t74wBt25E8K8eDO9E9t1nTgfoqH3IjzhhibXYGZIJ6YDC2YQckqUrBr4fFaxsbG4Z4xWL4tQWEA7YtN0vKnyH5qtwC7BeWoePvN/pZfFbG/AvqgAUkYL7kD1T5XqAT17Q5QbY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727882040; c=relaxed/simple; bh=whVvvacyysEOjUYvVSNXCF2AXIsxHb9DQEhAh4XDOpc=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=ryyO7F2wOl0j00NjHk5dCwyji8BbieeVzRr5YoVC9VremD8p7W4RpKc+2EhCsc5xfFWd3B5V8V1PPaeBMBvd3FWf+8z32WNjaQO4WyAeU/3gMkWwYBj4GT7KI3P+7P7Mh/YSnHzqp7l9kmgGuRiiiqO2QpIZupP7Y4qSdyQp6/4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de; spf=pass smtp.mailfrom=lst.de; arc=none smtp.client-ip=213.95.11.211 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=lst.de Received: by verein.lst.de (Postfix, from userid 2407) id C558B227AB1; Wed, 2 Oct 2024 17:13:44 +0200 (CEST) Date: Wed, 2 Oct 2024 17:13:44 +0200 From: Christoph Hellwig To: Jens Axboe Cc: Christoph Hellwig , Kanchan Joshi , kbusch@kernel.org, hare@suse.de, sagi@grimberg.me, martin.petersen@oracle.com, 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, javier.gonz@samsung.com Subject: Re: [PATCH v7 0/3] FDP and per-io hints Message-ID: <20241002151344.GA20364@lst.de> References: <20240930181305.17286-1-joshi.k@samsung.com> <20241001092047.GA23730@lst.de> <99c95f26-d6fb-4354-822d-eac94fdba765@kernel.dk> <20241002075140.GB20819@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: User-Agent: Mutt/1.5.17 (2007-11-01) On Wed, Oct 02, 2024 at 09:03:22AM -0600, Jens Axboe wrote: > > The previous stream separation approach made total sense, but just > > needed a fair amount of work. But it closely matches how things work > > at the hardware and file system level, so it was the right approach. > > What am I missing that makes this effort that different from streams? > Both are a lifetime hint. A stream has a lot less strings attached. But hey, don't make me argue for streams - you pushed the API in despite reservations back then, and we've learned a lot since. > > Suddenly dropping that and ignoring all comments really feels like > > someone urgently needs to pull a marketing stunt here. > > I think someone is just trying to finally get this feature in, so it > can get used by customers, after many months of fairly unproductive > discussion. Well, he finally started on the right approach and gave it up after the first round of feedback. That's just a bit weird.