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 935FB20A5E2; Fri, 11 Oct 2024 08:56:37 +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=1728636999; cv=none; b=q6r6AARwAuHdg8pWhkf+3G1uJO/5VT8HAhJt11FpP5nroY+qzXwDZJyjzv1C0ysbSRyze1g/95egvi9jQkTUe+WS4p4NdNPHcIXc4oWLBt+JcMfYhsWXFv3sGzcIBE9MR1gRStB/7ZF/V970gmlY1yxgxc6srT28imNN4nl9hJM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728636999; c=relaxed/simple; bh=3aK2GFXaB51o5dyRuGxLEUmOb2CRwQ0mXANQpLb2hNI=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=M/UEBIg7KepTQrm17lWOuwsa4ZFtmS/yWHXpyRJYbSxlV60PaZ0PhZ71nLFBgQ87IDNr4wx+haMXYrneexvPBUxHtgjgyM0KgTjMvQbf5f2BMkeviyKnwvvWyiKeII53pIvv8E+Tp+rQRs9Ln8U4p/UNjoItiR9Nlc5dMcwjO3o= 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 A1AE1227AB3; Fri, 11 Oct 2024 10:56:31 +0200 (CEST) Date: Fri, 11 Oct 2024 10:56:31 +0200 From: Christoph Hellwig To: Javier Gonzalez Cc: Christoph Hellwig , Hans Holmberg , Jens Axboe , "Martin K. Petersen" , Keith Busch , 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: <20241011085631.GA4039@lst.de> References: <20241004065233.oc5gqcq3lyaxzjhz@ArmHalley.local> <20241004123027.GA19168@lst.de> <20241007101011.boufh3tipewgvuao@ArmHalley.local> <97bd78a896b748b18e21e14511e8e0f4@CAMSVWEXC02.scsc.local> <20241010071327.rnh2wsuqdvcu2tx4@ArmHalley.local> <20241010092010.GC9287@lst.de> <20241010122232.r2omntepzkmtmx7p@ArmHalley.local> Precedence: bulk X-Mailing-List: linux-fsdevel@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: <20241010122232.r2omntepzkmtmx7p@ArmHalley.local> User-Agent: Mutt/1.5.17 (2007-11-01) On Thu, Oct 10, 2024 at 02:22:32PM +0200, Javier Gonzalez wrote: > Passthru is great for prototyping and getting insights on end-to-end > applicability. We see though that it is difficult to get a full solution > based on it, unless people implement a use-space layer tailored to their > use-case (e.g., a version SPDK's bdev). After the POC phase, most folks > that can use passthru prefer to move to block - with a validated > use-case it should be easier to get things upstream. > > This is exactly where we are now. That's a lot of marketing babble :) What exact thing is missing from the passthrough interface when using say spdx over io_uring? > If you saw the comments from Christian on the inode space, there are a > few plumbing challenges. Do you have any patches we could look at? I'm not sure what you refer to here.