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 81AFA2BAE3; Wed, 12 Jun 2024 05:03:47 +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=1718168628; cv=none; b=hT+pgGcqJo6qy9QSXGWxUgLnkwFc3kZprB8FiEabIL0WDzY6/IjWJ69O01n760Arbd+GGYUSSeNtA/He5gRJ1HQqT3ILp3fYZkX1o0ZI83pWZc8bkCx7kXSkQndx+iZKI11mj7ss3gDx4g3Cqyy9QrIH0rsYjGlFJvAmkP2h/G0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718168628; c=relaxed/simple; bh=yideDWBgYhb8gdrUDek21Tjymn+mofyCK/oOHbACXbQ=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=OyQEHCkrJ/aNq7QiFnqHXJ+vJy+MCBbnrUmj0UvvbgGUaivx9S6U7pdXMuG2EbEb0oonhD7Jf9XY7JJo9tYJ2A2JrXcZ+EPg6eFD6YKfh/XLvNsf9G0+UsM6KoAIoZd0VQxPBxXA+BDctoo7bGlrS8iKuaTQLgy+ppZnfFzCHvU= 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 0069168C4E; Wed, 12 Jun 2024 07:03:41 +0200 (CEST) Date: Wed, 12 Jun 2024 07:03:41 +0200 From: Christoph Hellwig To: Damien Le Moal Cc: Christoph Hellwig , Jens Axboe , Geert Uytterhoeven , Richard Weinberger , Philipp Reisner , Lars Ellenberg , Christoph =?iso-8859-1?Q?B=F6hmwalder?= , Josef Bacik , Ming Lei , "Michael S. Tsirkin" , Jason Wang , Roger Pau =?iso-8859-1?Q?Monn=E9?= , Alasdair Kergon , Mike Snitzer , Mikulas Patocka , Song Liu , Yu Kuai , Vineeth Vijayan , "Martin K. Petersen" , linux-m68k@lists.linux-m68k.org, linux-um@lists.infradead.org, drbd-dev@lists.linbit.com, nbd@other.debian.org, linuxppc-dev@lists.ozlabs.org, ceph-devel@vger.kernel.org, virtualization@lists.linux.dev, xen-devel@lists.xenproject.org, linux-bcache@vger.kernel.org, dm-devel@lists.linux.dev, linux-raid@vger.kernel.org, linux-mmc@vger.kernel.org, linux-mtd@lists.infradead.org, nvdimm@lists.linux.dev, linux-nvme@lists.infradead.org, linux-s390@vger.kernel.org, linux-scsi@vger.kernel.org, linux-block@vger.kernel.org Subject: Re: [PATCH 21/26] block: move the poll flag to queue_limits Message-ID: <20240612050341.GA27049@lst.de> References: <20240611051929.513387-1-hch@lst.de> <20240611051929.513387-22-hch@lst.de> Precedence: bulk X-Mailing-List: linux-bcache@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 Tue, Jun 11, 2024 at 05:21:07PM +0900, Damien Le Moal wrote: > Kind of the same remark as for io_stat about this not really being a device > feature. But I guess seeing "features" as a queue feature rather than just a > device feature makes it OK to have poll (and io_stat) as a feature rather than > a flag. So unlike io_stat this very much is a feature and a feature only as we don't even allow changing it. It purely exposes a device (or rather driver) capability.